fix: review fixes for MCP and API key feature

- Remove spurious ALTER TABLE client_targets DROP DEFAULT from migration
  (Prisma schema drift side-effect unrelated to this PR)
- Surface revoke errors in ApiKeysPage UI via deleteApiKey.isError
- Fix UpdateProjectInput.color type to allow null, removing unsafe cast
  in the update_project MCP tool handler

AGENTS.md

@@ -0,0 +1,126 @@
+# AGENTS.md — Codebase Guide for AI Coding Agents
+
+This document describes the structure, conventions, and commands for the `vibe_coding_timetracker` monorepo. Read it in full before making changes.
+
+## Repository Structure
+
+```text
+/
+├── frontend/          # React SPA (Vite + TypeScript + Tailwind)
+│   └── src/
+│       ├── api/       # Axios API client modules
+│       ├── components/# Shared UI components (PascalCase .tsx)
+│       ├── contexts/  # React Context providers
+│       ├── hooks/     # TanStack React Query hooks (useXxx.ts)
+│       ├── pages/     # Route-level page components
+│       ├── types/     # TypeScript interfaces (index.ts)
+│       └── utils/     # Pure utility functions
+├── backend/           # Express REST API (TypeScript + Prisma + PostgreSQL)
+│   └── src/
+│       ├── auth/      # OIDC + JWT logic
+│       ├── errors/    # AppError subclasses
+│       ├── middleware/# Express middlewares
+│       ├── prisma/    # Prisma client singleton
+│       ├── routes/    # Express routers (xxx.routes.ts)
+│       ├── schemas/   # Zod validation schemas
+│       └── services/  # Business logic classes (xxx.service.ts)
+├── ios/               # Native iOS app (Swift/Xcode)
+├── timetracker-chart/ # Helm chart for Kubernetes deployment
+└── docker-compose.yml
+```
+
+## Build, Lint, and Dev Commands
+
+### Frontend (`frontend/`)
+- **Dev Server:** `npm run dev` (port 5173)
+- **Build:** `npm run build` (tsc & vite build)
+- **Lint:** `npm run lint` (ESLint, zero warnings allowed)
+- **Preview:** `npm run preview`
+
+### Backend (`backend/`)
+- **Dev Server:** `npm run dev` (tsx watch)
+- **Build:** `npm run build` (tsc to dist/)
+- **Start:** `npm run start` (node dist/index.js)
+- **Database:**
+  - `npm run db:migrate` (Run migrations)
+  - `npm run db:generate` (Regenerate client)
+  - `npm run db:seed` (Seed database)
+
+### Full Stack (Root)
+- **Run all:** `docker-compose up`
+
+### Testing
+**No test framework is currently configured.** No test runner (`jest`, `vitest`) is installed and no `.spec.ts` or `.test.ts` files exist.
+- When adding tests, set up **Vitest** (aligned with Vite).
+- Add a `test` script to `package.json`.
+- **To run a single test file with Vitest once installed:**
+  ```bash
+  npx vitest run src/path/to/file.test.ts
+  ```
+
+## Code Style Guidelines
+
+### Imports & Exports
+- Use `@/` for all internal frontend imports: `import { useAuth } from "@/contexts/AuthContext"`
+- Use `import type { ... }` for type-only imports. Order external libraries first.
+- Named exports are standard. Avoid default exports (except in `App.tsx`).
+
+### Formatting
+- 2-space indentation. No Prettier config exists; maintain consistency with surrounding code.
+- Prefer double quotes. Trailing commas in multi-line objects/arrays.
+
+### Types & Naming Conventions
+- Define shared types as `interface` in `types/index.ts`.
+- Suffix input types: `CreateClientInput`.
+- Use `?` for optional fields, `string | null` for nullable fields (not `undefined`).
+- **Components:** `PascalCase.tsx` (`DashboardPage.tsx`)
+- **Hooks/Utils/API:** `camelCase.ts` (`useTimeEntries.ts`, `dateUtils.ts`)
+- **Backend Routes/Services:** `camelCase.routes.ts`, `camelCase.service.ts`
+- **Backend Schemas:** Zod schemas in `backend/src/schemas/index.ts` (e.g., `CreateClientSchema`).
+
+### React Components
+- Use named function declarations: `export function DashboardPage() { ... }`
+- Context hooks throw an error if called outside their provider.
+
+### State Management
+- **Server state:** TanStack React Query. Never use `useState` for server data.
+  - Use `mutateAsync` so callers can await and handle errors.
+  - Invalidate related queries after mutations: `queryClient.invalidateQueries`.
+- **Shared client state:** React Context.
+- **Local UI state:** `useState`.
+- **NO Redux or Zustand.**
+
+### Error Handling
+- **Frontend:**
+  ```typescript
+  try {
+    await someAsyncOperation()
+  } catch (err) {
+    setError(err instanceof Error ? err.message : "An error occurred")
+  }
+  ```
+  Store errors in local state and render inline as red text. No global error boundary exists.
+- **Backend:** Throw `AppError` subclasses from services.
+  ```typescript
+  router.get("/:id", async (req, res, next) => {
+    try {
+      res.json(await service.getById(req.params.id))
+    } catch (error) {
+      next(error) // Always forward to errorHandler middleware
+    }
+  })
+  ```
+
+### Styling
+- **Tailwind CSS v3** only. No CSS modules or styled-components.
+- Use `clsx` + `tailwind-merge` for class merging. Icons from `lucide-react` only.
+
+### Backend Validation & Database
+- Validate all incoming request data with Zod schemas in middleware.
+- Prisma v6 with PostgreSQL. Use the Prisma client singleton from `backend/src/prisma/`.
+- DB columns are `snake_case`, mapped to `camelCase` TypeScript via `@map`.
+
+## Key Architectural Decisions
+- Frontend communicates with Backend exclusively via typed Axios modules in `frontend/src/api/`.
+- iOS app shares no code with the web frontend.
+- Backend routes only handle HTTP concerns (parsing, validation, formatting); business logic belongs purely in services.

backend/package-lock.json

@@ -8,7 +8,9 @@
       "name": "timetracker-backend",
       "version": "1.0.0",
       "dependencies": {
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         "@prisma/client": "^6.19.2",
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         "cors": "^2.8.5",
         "dotenv": "^17.3.1",
         "express": "^4.18.2",
@@ -470,6 +472,388 @@
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       }
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+      "integrity": "sha512-sr6GbP+4edBwFndLbM60gf07z0FQ79gaExpnsjMGePXqFcSSb7t6iscpjk9DhFhwd+mTEQrzNafGP8/iGGFYaA==",
+      "license": "MIT",
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+        "ajv": "^8.17.1",
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+        "eventsource": "^3.0.2",
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+        "express": "^5.2.1",
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+        "zod-to-json-schema": "^3.25.1"
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+    "node_modules/type-fest": {
+      "version": "5.4.4",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-5.4.4.tgz",
+      "integrity": "sha512-JnTrzGu+zPV3aXIUhnyWJj4z/wigMsdYajGLIYakqyOW1nPllzXEJee0QQbHj+CTIQtXGlAjuK0UY+2xTyjVAw==",
+      "license": "(MIT OR CC0-1.0)",
+      "dependencies": {
+        "tagged-tag": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/type-is": {
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
@@ -2245,6 +2939,27 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/which": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "license": "ISC",
+      "dependencies": {
+        "isexe": "^2.0.0"
+      },
+      "bin": {
+        "node-which": "bin/node-which"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+      "license": "ISC"
+    },
     "node_modules/yallist": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
@@ -2259,6 +2974,15 @@
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
+    },
+    "node_modules/zod-to-json-schema": {
+      "version": "3.25.1",
+      "resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.25.1.tgz",
+      "integrity": "sha512-pM/SU9d3YAggzi6MtR4h7ruuQlqKtad8e9S0fmxcMi+ueAK5Korys/aWcV9LIIHTVbj01NdzxcnXSN+O74ZIVA==",
+      "license": "ISC",
+      "peerDependencies": {
+        "zod": "^3.25 || ^4"
+      }
     }
   }
 }

backend/package.json

@@ -10,7 +10,9 @@
     "db:seed": "tsx prisma/seed.ts"
   },
   "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.27.1",
     "@prisma/client": "^6.19.2",
+    "@quixo3/prisma-session-store": "^3.1.19",
     "cors": "^2.8.5",
     "dotenv": "^17.3.1",
     "express": "^4.18.2",

backend/prisma/migrations/20260223103350_add_session_model/migration.sql

@@ -0,0 +1,12 @@
+-- CreateTable
+CREATE TABLE "sessions" (
+    "id" TEXT NOT NULL,
+    "sid" TEXT NOT NULL,
+    "data" TEXT NOT NULL,
+    "expires_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "sessions_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "sessions_sid_key" ON "sessions"("sid");

backend/prisma/migrations/20260223123527_add_break_minutes/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "time_entries" ADD COLUMN "break_minutes" INTEGER NOT NULL DEFAULT 0;

backend/prisma/migrations/20260223200000_add_soft_delete/migration.sql

@@ -0,0 +1,8 @@
+-- AlterTable: add deleted_at column to clients
+ALTER TABLE "clients" ADD COLUMN "deleted_at" TIMESTAMP(3);
+
+-- AlterTable: add deleted_at column to projects
+ALTER TABLE "projects" ADD COLUMN "deleted_at" TIMESTAMP(3);
+
+-- AlterTable: add deleted_at column to time_entries
+ALTER TABLE "time_entries" ADD COLUMN "deleted_at" TIMESTAMP(3);

backend/prisma/migrations/20260223210000_add_soft_delete_targets_corrections/migration.sql

@@ -0,0 +1,5 @@
+-- AlterTable: add deleted_at column to client_targets
+ALTER TABLE "client_targets" ADD COLUMN "deleted_at" TIMESTAMP(3);
+
+-- AlterTable: add deleted_at column to balance_corrections
+ALTER TABLE "balance_corrections" ADD COLUMN "deleted_at" TIMESTAMP(3);

backend/prisma/migrations/20260224000000_client_targets_v2/migration.sql

@@ -0,0 +1,10 @@
+-- CreateEnum
+CREATE TYPE "PeriodType" AS ENUM ('WEEKLY', 'MONTHLY');
+
+-- AlterTable: rename weekly_hours -> target_hours, add period_type, add working_days
+ALTER TABLE "client_targets"
+  RENAME COLUMN "weekly_hours" TO "target_hours";
+
+ALTER TABLE "client_targets"
+  ADD COLUMN "period_type" "PeriodType" NOT NULL DEFAULT 'WEEKLY',
+  ADD COLUMN "working_days" TEXT[] NOT NULL DEFAULT ARRAY['MON','TUE','WED','THU','FRI']::TEXT[];

backend/prisma/migrations/20260316103132_add_api_keys/migration.sql

@@ -0,0 +1,21 @@
+-- CreateTable
+CREATE TABLE "api_keys" (
+    "id" TEXT NOT NULL,
+    "name" VARCHAR(255) NOT NULL,
+    "key_hash" VARCHAR(64) NOT NULL,
+    "prefix" VARCHAR(16) NOT NULL,
+    "last_used_at" TIMESTAMP(3),
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "user_id" VARCHAR(255) NOT NULL,
+
+    CONSTRAINT "api_keys_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "api_keys_key_hash_key" ON "api_keys"("key_hash");
+
+-- CreateIndex
+CREATE INDEX "api_keys_user_id_idx" ON "api_keys"("user_id");
+
+-- AddForeignKey
+ALTER TABLE "api_keys" ADD CONSTRAINT "api_keys_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;

backend/prisma/schema.prisma

@@ -10,7 +10,7 @@ datasource db {
 model User {
   id        String   @id @db.VarChar(255)
   username  String   @db.VarChar(255)
-  fullName  String?  @db.VarChar(255) @map("full_name")
+  fullName  String?  @map("full_name") @db.VarChar(255)
   email     String   @db.VarChar(255)
   createdAt DateTime @default(now()) @map("created_at")
   updatedAt DateTime @updatedAt @map("updated_at")
@@ -20,20 +20,22 @@ model User {
   timeEntries   TimeEntry[]
   ongoingTimer  OngoingTimer?
   clientTargets ClientTarget[]
+  apiKeys       ApiKey[]
 
   @@map("users")
 }
 
 model Client {
-  id          String   @id @default(uuid())
-  name        String   @db.VarChar(255)
-  description String?  @db.Text
-  createdAt   DateTime @default(now()) @map("created_at")
-  updatedAt   DateTime @updatedAt @map("updated_at")
+  id          String    @id @default(uuid())
+  name        String    @db.VarChar(255)
+  description String?   @db.Text
+  createdAt   DateTime  @default(now()) @map("created_at")
+  updatedAt   DateTime  @updatedAt @map("updated_at")
+  deletedAt   DateTime? @map("deleted_at")
 
-  userId   String @map("user_id") @db.VarChar(255)
-  user     User   @relation(fields: [userId], references: [id], onDelete: Cascade)
-  projects Project[]
+  userId        String         @map("user_id") @db.VarChar(255)
+  user          User           @relation(fields: [userId], references: [id], onDelete: Cascade)
+  projects      Project[]
   clientTargets ClientTarget[]
 
   @@index([userId])
@@ -41,19 +43,20 @@ model Client {
 }
 
 model Project {
-  id          String  @id @default(uuid())
-  name        String  @db.VarChar(255)
-  description String? @db.Text
-  color       String? @db.VarChar(7) // Hex color code
-  createdAt   DateTime @default(now()) @map("created_at")
-  updatedAt   DateTime @updatedAt @map("updated_at")
+  id          String    @id @default(uuid())
+  name        String    @db.VarChar(255)
+  description String?   @db.Text
+  color       String?   @db.VarChar(7) // Hex color code
+  createdAt   DateTime  @default(now()) @map("created_at")
+  updatedAt   DateTime  @updatedAt @map("updated_at")
+  deletedAt   DateTime? @map("deleted_at")
 
   userId   String @map("user_id") @db.VarChar(255)
   user     User   @relation(fields: [userId], references: [id], onDelete: Cascade)
   clientId String @map("client_id")
   client   Client @relation(fields: [clientId], references: [id], onDelete: Cascade)
 
-  timeEntries  TimeEntry[]
+  timeEntries   TimeEntry[]
   ongoingTimers OngoingTimer[]
 
   @@index([userId])
@@ -62,16 +65,18 @@ model Project {
 }
 
 model TimeEntry {
-  id          String   @id @default(uuid())
-  startTime   DateTime @map("start_time") @db.Timestamptz()
-  endTime     DateTime @map("end_time") @db.Timestamptz()
-  description String?  @db.Text
-  createdAt   DateTime @default(now()) @map("created_at")
-  updatedAt   DateTime @updatedAt @map("updated_at")
+  id           String    @id @default(uuid())
+  startTime    DateTime  @map("start_time") @db.Timestamptz()
+  endTime      DateTime  @map("end_time") @db.Timestamptz()
+  breakMinutes Int       @default(0) @map("break_minutes")
+  description  String?   @db.Text
+  createdAt    DateTime  @default(now()) @map("created_at")
+  updatedAt    DateTime  @updatedAt @map("updated_at")
+  deletedAt    DateTime? @map("deleted_at")
 
-  userId    String @map("user_id") @db.VarChar(255)
-  user      User   @relation(fields: [userId], references: [id], onDelete: Cascade)
-  projectId String @map("project_id")
+  userId    String  @map("user_id") @db.VarChar(255)
+  user      User    @relation(fields: [userId], references: [id], onDelete: Cascade)
+  projectId String  @map("project_id")
   project   Project @relation(fields: [projectId], references: [id], onDelete: Cascade)
 
   @@index([userId])
@@ -86,21 +91,29 @@ model OngoingTimer {
   createdAt DateTime @default(now()) @map("created_at")
   updatedAt DateTime @updatedAt @map("updated_at")
 
-  userId    String  @map("user_id") @db.VarChar(255) @unique
-  user      User    @relation(fields: [userId], references: [id], onDelete: Cascade)
-  projectId String? @map("project_id")
+  userId    String   @unique @map("user_id") @db.VarChar(255)
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  projectId String?  @map("project_id")
   project   Project? @relation(fields: [projectId], references: [id], onDelete: SetNull)
 
   @@index([userId])
   @@map("ongoing_timers")
 }
 
+enum PeriodType {
+  WEEKLY
+  MONTHLY
+}
+
 model ClientTarget {
-  id           String   @id @default(uuid())
-  weeklyHours  Float    @map("weekly_hours")
-  startDate    DateTime @map("start_date") @db.Date // Always a Monday
-  createdAt    DateTime @default(now()) @map("created_at")
-  updatedAt    DateTime @updatedAt @map("updated_at")
+  id          String     @id @default(uuid())
+  targetHours Float      @map("target_hours")
+  periodType  PeriodType @default(WEEKLY) @map("period_type")
+  workingDays String[]   @map("working_days") // e.g. ["MON","WED","FRI"]
+  startDate   DateTime   @map("start_date") @db.Date
+  createdAt   DateTime   @default(now()) @map("created_at")
+  updatedAt   DateTime   @updatedAt @map("updated_at")
+  deletedAt   DateTime?  @map("deleted_at")
 
   userId   String @map("user_id") @db.VarChar(255)
   user     User   @relation(fields: [userId], references: [id], onDelete: Cascade)
@@ -116,16 +129,41 @@ model ClientTarget {
 }
 
 model BalanceCorrection {
-  id          String   @id @default(uuid())
-  date        DateTime @map("date") @db.Date
+  id          String    @id @default(uuid())
+  date        DateTime  @map("date") @db.Date
   hours       Float
-  description String?  @db.VarChar(255)
-  createdAt   DateTime @default(now()) @map("created_at")
-  updatedAt   DateTime @updatedAt @map("updated_at")
+  description String?   @db.VarChar(255)
+  createdAt   DateTime  @default(now()) @map("created_at")
+  updatedAt   DateTime  @updatedAt @map("updated_at")
+  deletedAt   DateTime? @map("deleted_at")
 
   clientTargetId String       @map("client_target_id")
   clientTarget   ClientTarget @relation(fields: [clientTargetId], references: [id], onDelete: Cascade)
 
   @@index([clientTargetId])
   @@map("balance_corrections")
-}
+}
+
+model Session {
+  id        String   @id
+  sid       String   @unique
+  data      String   @db.Text
+  expiresAt DateTime @map("expires_at")
+
+  @@map("sessions")
+}
+
+model ApiKey {
+  id         String    @id @default(uuid())
+  name       String    @db.VarChar(255)
+  keyHash    String    @unique @map("key_hash") @db.VarChar(64) // SHA-256 hex
+  prefix     String    @db.VarChar(16) // first chars of raw key for display
+  lastUsedAt DateTime? @map("last_used_at")
+  createdAt  DateTime  @default(now()) @map("created_at")
+
+  userId String @map("user_id") @db.VarChar(255)
+  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@index([userId])
+  @@map("api_keys")
+}

backend/src/index.ts

@@ -1,8 +1,9 @@
 import express from "express";
 import cors from "cors";
 import session from "express-session";
+import { PrismaSessionStore } from "@quixo3/prisma-session-store";
 import { config, validateConfig } from "./config";
-import { connectDatabase } from "./prisma/client";
+import { connectDatabase, prisma } from "./prisma/client";
 import { errorHandler, notFoundHandler } from "./middleware/errorHandler";
 
 // Import routes
@@ -12,6 +13,8 @@ import projectRoutes from "./routes/project.routes";
 import timeEntryRoutes from "./routes/timeEntry.routes";
 import timerRoutes from "./routes/timer.routes";
 import clientTargetRoutes from "./routes/clientTarget.routes";
+import apiKeyRoutes from "./routes/apiKey.routes";
+import mcpRoutes from "./routes/mcp.routes";
 
 async function main() {
   // Validate configuration
@@ -43,6 +46,11 @@ async function main() {
       resave: false,
       saveUninitialized: false,
       name: "sessionId",
+      store: new PrismaSessionStore(prisma, {
+        checkPeriod: 2 * 60 * 1000, // ms
+        dbRecordIdIsSessionId: true,
+        dbRecordIdFunction: undefined,
+      }),
       cookie: {
         secure: config.nodeEnv === "production",
         httpOnly: true,
@@ -64,6 +72,8 @@ async function main() {
   app.use("/time-entries", timeEntryRoutes);
   app.use("/timer", timerRoutes);
   app.use("/client-targets", clientTargetRoutes);
+  app.use("/api-keys", apiKeyRoutes);
+  app.use("/mcp", mcpRoutes);
 
   // Error handling
   app.use(notFoundHandler);

backend/src/middleware/auth.ts

@@ -2,6 +2,9 @@ import { Request, Response, NextFunction } from 'express';
 import { prisma } from '../prisma/client';
 import type { AuthenticatedRequest, AuthenticatedUser } from '../types';
 import { verifyBackendJwt } from '../auth/jwt';
+import { ApiKeyService } from '../services/apiKey.service';
+
+const apiKeyService = new ApiKeyService();
 
 export async function requireAuth(
   req: AuthenticatedRequest,
@@ -17,11 +20,33 @@ export async function requireAuth(
     return next();
   }
 
-  // 2. Bearer JWT auth (iOS / native clients)
+  // 2. Bearer token auth (JWT or API key)
   const authHeader = req.headers.authorization;
   if (authHeader?.startsWith('Bearer ')) {
     const token = authHeader.slice(7);
     console.log(`${tag} -> Bearer token present (first 20 chars: ${token.slice(0, 20)}…)`);
+
+    // 2a. API key — detected by the "sk_" prefix
+    if (token.startsWith('sk_')) {
+      try {
+        const user = await apiKeyService.verify(token);
+        if (!user) {
+          console.warn(`${tag} -> API key verification failed: key not found`);
+          res.status(401).json({ error: 'Unauthorized: invalid API key' });
+          return;
+        }
+        req.user = user;
+        console.log(`${tag} -> API key auth OK (user: ${req.user.id})`);
+        return next();
+      } catch (err) {
+        const message = err instanceof Error ? err.message : String(err);
+        console.warn(`${tag} -> API key verification error: ${message}`);
+        res.status(401).json({ error: `Unauthorized: ${message}` });
+        return;
+      }
+    }
+
+    // 2b. JWT (iOS / native clients)
     try {
       req.user = verifyBackendJwt(token);
       console.log(`${tag} -> JWT auth OK (user: ${req.user.id})`);

backend/src/routes/apiKey.routes.ts

@@ -0,0 +1,51 @@
+import { Router } from 'express';
+import { requireAuth } from '../middleware/auth';
+import { validateBody, validateParams } from '../middleware/validation';
+import { ApiKeyService } from '../services/apiKey.service';
+import { CreateApiKeySchema, IdSchema } from '../schemas';
+import type { AuthenticatedRequest } from '../types';
+
+const router = Router();
+const apiKeyService = new ApiKeyService();
+
+// GET /api-keys - List user's API keys
+router.get('/', requireAuth, async (req: AuthenticatedRequest, res, next) => {
+  try {
+    const keys = await apiKeyService.list(req.user!.id);
+    res.json(keys);
+  } catch (error) {
+    next(error);
+  }
+});
+
+// POST /api-keys - Create a new API key
+router.post(
+  '/',
+  requireAuth,
+  validateBody(CreateApiKeySchema),
+  async (req: AuthenticatedRequest, res, next) => {
+    try {
+      const created = await apiKeyService.create(req.user!.id, req.body.name);
+      res.status(201).json(created);
+    } catch (error) {
+      next(error);
+    }
+  }
+);
+
+// DELETE /api-keys/:id - Revoke an API key
+router.delete(
+  '/:id',
+  requireAuth,
+  validateParams(IdSchema),
+  async (req: AuthenticatedRequest, res, next) => {
+    try {
+      await apiKeyService.delete(req.params.id, req.user!.id);
+      res.status(204).send();
+    } catch (error) {
+      next(error);
+    }
+  }
+);
+
+export default router;

backend/src/routes/mcp.routes.ts

@@ -0,0 +1,455 @@
+import { Router, Request, Response } from 'express';
+import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { StreamableHTTPServerTransport } from '@modelcontextprotocol/sdk/server/streamableHttp.js';
+import { z } from 'zod';
+import { requireAuth } from '../middleware/auth';
+import type { AuthenticatedRequest, AuthenticatedUser } from '../types';
+import { ClientService } from '../services/client.service';
+import { ProjectService } from '../services/project.service';
+import { TimeEntryService } from '../services/timeEntry.service';
+import { TimerService } from '../services/timer.service';
+import { ClientTargetService } from '../services/clientTarget.service';
+
+const router = Router();
+
+// Service instances — shared, stateless
+const clientService = new ClientService();
+const projectService = new ProjectService();
+const timeEntryService = new TimeEntryService();
+const timerService = new TimerService();
+const clientTargetService = new ClientTargetService();
+
+/**
+ * Build and return a fresh stateless McpServer pre-populated with all tools
+ * scoped to the given authenticated user.
+ */
+function buildMcpServer(user: AuthenticatedUser): McpServer {
+  const server = new McpServer({
+    name: 'timetracker',
+    version: '1.0.0',
+  });
+
+  const userId = user.id;
+
+  // -------------------------------------------------------------------------
+  // Clients
+  // -------------------------------------------------------------------------
+
+  server.registerTool(
+    'list_clients',
+    {
+      description: 'List all clients for the authenticated user.',
+      inputSchema: {},
+    },
+    async () => {
+      const clients = await clientService.findAll(userId);
+      return { content: [{ type: 'text', text: JSON.stringify(clients, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'create_client',
+    {
+      description: 'Create a new client.',
+      inputSchema: {
+        name: z.string().min(1).max(255).describe('Client name'),
+        description: z.string().max(1000).optional().describe('Optional description'),
+      },
+    },
+    async ({ name, description }) => {
+      const client = await clientService.create(userId, { name, description });
+      return { content: [{ type: 'text', text: JSON.stringify(client, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'update_client',
+    {
+      description: 'Update an existing client.',
+      inputSchema: {
+        id: z.string().uuid().describe('Client ID'),
+        name: z.string().min(1).max(255).optional().describe('New name'),
+        description: z.string().max(1000).optional().describe('New description'),
+      },
+    },
+    async ({ id, name, description }) => {
+      const client = await clientService.update(id, userId, { name, description });
+      return { content: [{ type: 'text', text: JSON.stringify(client, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'delete_client',
+    {
+      description: 'Soft-delete a client (and its projects).',
+      inputSchema: {
+        id: z.string().uuid().describe('Client ID'),
+      },
+    },
+    async ({ id }) => {
+      await clientService.delete(id, userId);
+      return { content: [{ type: 'text', text: `Client ${id} deleted.` }] };
+    }
+  );
+
+  // -------------------------------------------------------------------------
+  // Projects
+  // -------------------------------------------------------------------------
+
+  server.registerTool(
+    'list_projects',
+    {
+      description: 'List all projects, optionally filtered by clientId.',
+      inputSchema: {
+        clientId: z.string().uuid().optional().describe('Filter by client ID'),
+      },
+    },
+    async ({ clientId }) => {
+      const projects = await projectService.findAll(userId, clientId);
+      return { content: [{ type: 'text', text: JSON.stringify(projects, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'create_project',
+    {
+      description: 'Create a new project under a client.',
+      inputSchema: {
+        name: z.string().min(1).max(255).describe('Project name'),
+        clientId: z.string().uuid().describe('Client ID the project belongs to'),
+        description: z.string().max(1000).optional().describe('Optional description'),
+        color: z.string().regex(/^#[0-9A-Fa-f]{6}$/).optional().describe('Hex color code, e.g. #FF5733'),
+      },
+    },
+    async ({ name, clientId, description, color }) => {
+      const project = await projectService.create(userId, { name, clientId, description, color });
+      return { content: [{ type: 'text', text: JSON.stringify(project, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'update_project',
+    {
+      description: 'Update an existing project.',
+      inputSchema: {
+        id: z.string().uuid().describe('Project ID'),
+        name: z.string().min(1).max(255).optional().describe('New name'),
+        description: z.string().max(1000).optional().describe('New description'),
+        color: z.string().regex(/^#[0-9A-Fa-f]{6}$/).nullable().optional().describe('Hex color or null to clear'),
+        clientId: z.string().uuid().optional().describe('Move project to a different client'),
+      },
+    },
+    async ({ id, name, description, color, clientId }) => {
+      const project = await projectService.update(id, userId, { name, description, color, clientId });
+      return { content: [{ type: 'text', text: JSON.stringify(project, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'delete_project',
+    {
+      description: 'Soft-delete a project.',
+      inputSchema: {
+        id: z.string().uuid().describe('Project ID'),
+      },
+    },
+    async ({ id }) => {
+      await projectService.delete(id, userId);
+      return { content: [{ type: 'text', text: `Project ${id} deleted.` }] };
+    }
+  );
+
+  // -------------------------------------------------------------------------
+  // Time entries
+  // -------------------------------------------------------------------------
+
+  server.registerTool(
+    'list_time_entries',
+    {
+      description: 'List time entries with optional filters. Returns paginated results.',
+      inputSchema: {
+        startDate: z.string().datetime().optional().describe('Filter entries starting at or after this ISO datetime'),
+        endDate: z.string().datetime().optional().describe('Filter entries starting at or before this ISO datetime'),
+        projectId: z.string().uuid().optional().describe('Filter by project ID'),
+        clientId: z.string().uuid().optional().describe('Filter by client ID'),
+        page: z.number().int().min(1).optional().default(1).describe('Page number (default 1)'),
+        limit: z.number().int().min(1).max(100).optional().default(50).describe('Results per page (max 100, default 50)'),
+      },
+    },
+    async (filters) => {
+      const result = await timeEntryService.findAll(userId, filters);
+      return { content: [{ type: 'text', text: JSON.stringify(result, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'create_time_entry',
+    {
+      description: 'Create a manual time entry.',
+      inputSchema: {
+        projectId: z.string().uuid().describe('Project ID'),
+        startTime: z.string().datetime().describe('Start time as ISO datetime string'),
+        endTime: z.string().datetime().describe('End time as ISO datetime string'),
+        breakMinutes: z.number().int().min(0).optional().describe('Break duration in minutes (default 0)'),
+        description: z.string().max(1000).optional().describe('Optional description'),
+      },
+    },
+    async ({ projectId, startTime, endTime, breakMinutes, description }) => {
+      const entry = await timeEntryService.create(userId, { projectId, startTime, endTime, breakMinutes, description });
+      return { content: [{ type: 'text', text: JSON.stringify(entry, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'update_time_entry',
+    {
+      description: 'Update an existing time entry.',
+      inputSchema: {
+        id: z.string().uuid().describe('Time entry ID'),
+        startTime: z.string().datetime().optional().describe('New start time'),
+        endTime: z.string().datetime().optional().describe('New end time'),
+        breakMinutes: z.number().int().min(0).optional().describe('New break duration in minutes'),
+        description: z.string().max(1000).optional().describe('New description'),
+        projectId: z.string().uuid().optional().describe('Move to a different project'),
+      },
+    },
+    async ({ id, ...data }) => {
+      const entry = await timeEntryService.update(id, userId, data);
+      return { content: [{ type: 'text', text: JSON.stringify(entry, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'delete_time_entry',
+    {
+      description: 'Delete a time entry.',
+      inputSchema: {
+        id: z.string().uuid().describe('Time entry ID'),
+      },
+    },
+    async ({ id }) => {
+      await timeEntryService.delete(id, userId);
+      return { content: [{ type: 'text', text: `Time entry ${id} deleted.` }] };
+    }
+  );
+
+  server.registerTool(
+    'get_statistics',
+    {
+      description: 'Get aggregated time-tracking statistics, grouped by project and client.',
+      inputSchema: {
+        startDate: z.string().datetime().optional().describe('Filter from this ISO datetime'),
+        endDate: z.string().datetime().optional().describe('Filter until this ISO datetime'),
+        projectId: z.string().uuid().optional().describe('Filter by project ID'),
+        clientId: z.string().uuid().optional().describe('Filter by client ID'),
+      },
+    },
+    async (filters) => {
+      const stats = await timeEntryService.getStatistics(userId, filters);
+      return { content: [{ type: 'text', text: JSON.stringify(stats, null, 2) }] };
+    }
+  );
+
+  // -------------------------------------------------------------------------
+  // Timer
+  // -------------------------------------------------------------------------
+
+  server.registerTool(
+    'get_timer',
+    {
+      description: 'Get the current running timer, or null if none is active.',
+      inputSchema: {},
+    },
+    async () => {
+      const timer = await timerService.getOngoingTimer(userId);
+      return { content: [{ type: 'text', text: JSON.stringify(timer, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'start_timer',
+    {
+      description: 'Start a new timer. Fails if a timer is already running.',
+      inputSchema: {
+        projectId: z.string().uuid().optional().describe('Assign the timer to a project (can be set later)'),
+      },
+    },
+    async ({ projectId }) => {
+      const timer = await timerService.start(userId, { projectId });
+      return { content: [{ type: 'text', text: JSON.stringify(timer, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'stop_timer',
+    {
+      description: 'Stop the running timer and save it as a time entry. A project must be assigned.',
+      inputSchema: {
+        projectId: z.string().uuid().optional().describe('Assign/override the project before stopping'),
+      },
+    },
+    async ({ projectId }) => {
+      const entry = await timerService.stop(userId, { projectId });
+      return { content: [{ type: 'text', text: JSON.stringify(entry, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'cancel_timer',
+    {
+      description: 'Cancel the running timer without saving a time entry.',
+      inputSchema: {},
+    },
+    async () => {
+      await timerService.cancel(userId);
+      return { content: [{ type: 'text', text: 'Timer cancelled.' }] };
+    }
+  );
+
+  // -------------------------------------------------------------------------
+  // Client targets
+  // -------------------------------------------------------------------------
+
+  server.registerTool(
+    'list_client_targets',
+    {
+      description: 'List all client hour targets with computed balance for each period.',
+      inputSchema: {},
+    },
+    async () => {
+      const targets = await clientTargetService.findAll(userId);
+      return { content: [{ type: 'text', text: JSON.stringify(targets, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'create_client_target',
+    {
+      description: 'Create a new hour target for a client.',
+      inputSchema: {
+        clientId: z.string().uuid().describe('Client ID'),
+        targetHours: z.number().positive().max(168).describe('Target hours per period'),
+        periodType: z.enum(['weekly', 'monthly']).describe('Period type: weekly or monthly'),
+        workingDays: z.array(z.enum(['MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT', 'SUN'])).min(1).describe('Working days, e.g. ["MON","TUE","WED","THU","FRI"]'),
+        startDate: z.string().regex(/^\d{4}-\d{2}-\d{2}$/).describe('Start date in YYYY-MM-DD format'),
+      },
+    },
+    async (data) => {
+      const target = await clientTargetService.create(userId, data);
+      return { content: [{ type: 'text', text: JSON.stringify(target, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'update_client_target',
+    {
+      description: 'Update an existing client hour target.',
+      inputSchema: {
+        id: z.string().uuid().describe('Target ID'),
+        targetHours: z.number().positive().max(168).optional().describe('New target hours per period'),
+        periodType: z.enum(['weekly', 'monthly']).optional().describe('New period type'),
+        workingDays: z.array(z.enum(['MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT', 'SUN'])).min(1).optional().describe('New working days'),
+        startDate: z.string().regex(/^\d{4}-\d{2}-\d{2}$/).optional().describe('New start date in YYYY-MM-DD'),
+      },
+    },
+    async ({ id, ...data }) => {
+      const target = await clientTargetService.update(id, userId, data);
+      return { content: [{ type: 'text', text: JSON.stringify(target, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'delete_client_target',
+    {
+      description: 'Delete a client hour target.',
+      inputSchema: {
+        id: z.string().uuid().describe('Target ID'),
+      },
+    },
+    async ({ id }) => {
+      await clientTargetService.delete(id, userId);
+      return { content: [{ type: 'text', text: `Client target ${id} deleted.` }] };
+    }
+  );
+
+  server.registerTool(
+    'add_target_correction',
+    {
+      description: 'Add a manual hour correction to a client target (e.g. for holidays or overtime carry-over).',
+      inputSchema: {
+        targetId: z.string().uuid().describe('Client target ID'),
+        date: z.string().regex(/^\d{4}-\d{2}-\d{2}$/).describe('Date of correction in YYYY-MM-DD format'),
+        hours: z.number().min(-1000).max(1000).describe('Hours to add (negative to deduct)'),
+        description: z.string().max(255).optional().describe('Optional reason for the correction'),
+      },
+    },
+    async ({ targetId, date, hours, description }) => {
+      const correction = await clientTargetService.addCorrection(targetId, userId, { date, hours, description });
+      return { content: [{ type: 'text', text: JSON.stringify(correction, null, 2) }] };
+    }
+  );
+
+  server.registerTool(
+    'delete_target_correction',
+    {
+      description: 'Delete a manual hour correction from a client target.',
+      inputSchema: {
+        targetId: z.string().uuid().describe('Client target ID'),
+        correctionId: z.string().uuid().describe('Correction ID'),
+      },
+    },
+    async ({ targetId, correctionId }) => {
+      await clientTargetService.deleteCorrection(targetId, correctionId, userId);
+      return { content: [{ type: 'text', text: `Correction ${correctionId} deleted.` }] };
+    }
+  );
+
+  return server;
+}
+
+// ---------------------------------------------------------------------------
+// Route handler — one fresh McpServer + transport per request (stateless)
+// ---------------------------------------------------------------------------
+
+async function handleMcpRequest(req: AuthenticatedRequest, res: Response): Promise<void> {
+  const user = req.user!;
+
+  const transport = new StreamableHTTPServerTransport({ sessionIdGenerator: undefined });
+  const mcpServer = buildMcpServer(user);
+
+  // Ensure the server is cleaned up when the response finishes
+  res.on('close', () => {
+    transport.close().catch(() => undefined);
+    mcpServer.close().catch(() => undefined);
+  });
+
+  await mcpServer.connect(transport);
+  await transport.handleRequest(req as unknown as Request, res, req.body);
+}
+
+// GET /mcp — SSE stream for server-initiated messages
+router.get('/', requireAuth, (req: AuthenticatedRequest, res: Response) => {
+  handleMcpRequest(req, res).catch((err) => {
+    console.error('[MCP] GET error:', err);
+    if (!res.headersSent) {
+      res.status(500).json({ error: 'Internal server error' });
+    }
+  });
+});
+
+// POST /mcp — JSON-RPC requests
+router.post('/', requireAuth, (req: AuthenticatedRequest, res: Response) => {
+  handleMcpRequest(req, res).catch((err) => {
+    console.error('[MCP] POST error:', err);
+    if (!res.headersSent) {
+      res.status(500).json({ error: 'Internal server error' });
+    }
+  });
+});
+
+// DELETE /mcp — session termination (stateless: always 405)
+router.delete('/', (_req, res: Response) => {
+  res.status(405).json({ error: 'Sessions are not supported (stateless mode)' });
+});
+
+export default router;

backend/src/routes/timer.routes.ts

@@ -48,6 +48,16 @@ router.put(
   }
 );
 
+// DELETE /api/timer - Cancel (discard) the ongoing timer without creating a time entry
+router.delete('/', requireAuth, async (req: AuthenticatedRequest, res, next) => {
+  try {
+    await timerService.cancel(req.user!.id);
+    res.status(204).send();
+  } catch (error) {
+    next(error);
+  }
+});
+
 // POST /api/timer/stop - Stop timer
 router.post(
   '/stop',

backend/src/schemas/index.ts

@@ -31,6 +31,7 @@ export const UpdateProjectSchema = z.object({
 export const CreateTimeEntrySchema = z.object({
   startTime: z.string().datetime(),
   endTime: z.string().datetime(),
+  breakMinutes: z.number().int().min(0).optional(),
   description: z.string().max(1000).optional(),
   projectId: z.string().uuid(),
 });
@@ -38,6 +39,7 @@ export const CreateTimeEntrySchema = z.object({
 export const UpdateTimeEntrySchema = z.object({
   startTime: z.string().datetime().optional(),
   endTime: z.string().datetime().optional(),
+  breakMinutes: z.number().int().min(0).optional(),
   description: z.string().max(1000).optional(),
   projectId: z.string().uuid().optional(),
 });
@@ -64,20 +66,27 @@ export const StartTimerSchema = z.object({
 
 export const UpdateTimerSchema = z.object({
   projectId: z.string().uuid().optional().nullable(),
+  startTime: z.string().datetime().optional(),
 });
 
 export const StopTimerSchema = z.object({
   projectId: z.string().uuid().optional(),
 });
 
+const WorkingDayEnum = z.enum(['MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT', 'SUN']);
+
 export const CreateClientTargetSchema = z.object({
   clientId: z.string().uuid(),
-  weeklyHours: z.number().positive().max(168),
+  targetHours: z.number().positive().max(168),
+  periodType: z.enum(['weekly', 'monthly']),
+  workingDays: z.array(WorkingDayEnum).min(1, 'At least one working day is required'),
   startDate: z.string().regex(/^\d{4}-\d{2}-\d{2}$/, 'startDate must be a date in YYYY-MM-DD format'),
 });
 
 export const UpdateClientTargetSchema = z.object({
-  weeklyHours: z.number().positive().max(168).optional(),
+  targetHours: z.number().positive().max(168).optional(),
+  periodType: z.enum(['weekly', 'monthly']).optional(),
+  workingDays: z.array(WorkingDayEnum).min(1, 'At least one working day is required').optional(),
   startDate: z.string().regex(/^\d{4}-\d{2}-\d{2}$/, 'startDate must be a date in YYYY-MM-DD format').optional(),
 });
 
@@ -86,3 +95,7 @@ export const CreateCorrectionSchema = z.object({
   hours: z.number().min(-1000).max(1000),
   description: z.string().max(255).optional(),
 });
+
+export const CreateApiKeySchema = z.object({
+  name: z.string().min(1).max(255),
+});

backend/src/services/apiKey.service.ts

@@ -0,0 +1,99 @@
+import { createHash, randomUUID } from 'crypto';
+import { prisma } from '../prisma/client';
+import { NotFoundError } from '../errors/AppError';
+import type { AuthenticatedUser } from '../types';
+
+const KEY_PREFIX_LENGTH = 12; // chars shown in UI
+
+function hashKey(rawKey: string): string {
+  return createHash('sha256').update(rawKey).digest('hex');
+}
+
+function generateRawKey(): string {
+  return `sk_${randomUUID().replace(/-/g, '')}`;
+}
+
+export interface ApiKeyListItem {
+  id: string;
+  name: string;
+  prefix: string;
+  createdAt: string;
+  lastUsedAt: string | null;
+}
+
+export interface CreatedApiKey {
+  id: string;
+  name: string;
+  prefix: string;
+  rawKey: string; // returned once only
+  createdAt: string;
+}
+
+export class ApiKeyService {
+  async create(userId: string, name: string): Promise<CreatedApiKey> {
+    const rawKey = generateRawKey();
+    const keyHash = hashKey(rawKey);
+    const prefix = rawKey.slice(0, KEY_PREFIX_LENGTH);
+
+    const record = await prisma.apiKey.create({
+      data: { userId, name, keyHash, prefix },
+    });
+
+    return {
+      id: record.id,
+      name: record.name,
+      prefix: record.prefix,
+      rawKey,
+      createdAt: record.createdAt.toISOString(),
+    };
+  }
+
+  async list(userId: string): Promise<ApiKeyListItem[]> {
+    const keys = await prisma.apiKey.findMany({
+      where: { userId },
+      orderBy: { createdAt: 'desc' },
+    });
+
+    return keys.map((k) => ({
+      id: k.id,
+      name: k.name,
+      prefix: k.prefix,
+      createdAt: k.createdAt.toISOString(),
+      lastUsedAt: k.lastUsedAt ? k.lastUsedAt.toISOString() : null,
+    }));
+  }
+
+  async delete(id: string, userId: string): Promise<void> {
+    const existing = await prisma.apiKey.findFirst({ where: { id, userId } });
+    if (!existing) {
+      throw new NotFoundError('API key not found');
+    }
+    await prisma.apiKey.delete({ where: { id } });
+  }
+
+  /**
+   * Verify a raw API key string. Returns the owning user or null.
+   * Updates lastUsedAt on success.
+   */
+  async verify(rawKey: string): Promise<AuthenticatedUser | null> {
+    const keyHash = hashKey(rawKey);
+    const record = await prisma.apiKey.findUnique({
+      where: { keyHash },
+      include: { user: true },
+    });
+
+    if (!record) return null;
+
+    // Update lastUsedAt in the background — don't await to keep latency low
+    prisma.apiKey
+      .update({ where: { id: record.id }, data: { lastUsedAt: new Date() } })
+      .catch(() => undefined);
+
+    return {
+      id: record.user.id,
+      username: record.user.username,
+      fullName: record.user.fullName,
+      email: record.user.email,
+    };
+  }
+}

backend/src/services/client.service.ts

@@ -5,14 +5,14 @@ import type { CreateClientInput, UpdateClientInput } from "../types";
 export class ClientService {
   async findAll(userId: string) {
     return prisma.client.findMany({
-      where: { userId },
+      where: { userId, deletedAt: null },
       orderBy: { name: "asc" },
     });
   }
 
   async findById(id: string, userId: string) {
     return prisma.client.findFirst({
-      where: { id, userId },
+      where: { id, userId, deletedAt: null },
     });
   }
 
@@ -43,8 +43,9 @@ export class ClientService {
       throw new NotFoundError("Client not found");
     }
 
-    await prisma.client.delete({
+    await prisma.client.update({
       where: { id },
+      data: { deletedAt: new Date() },
     });
   }
 }

backend/src/services/clientTarget.service.ts

@@ -3,44 +3,191 @@ import { NotFoundError, BadRequestError } from '../errors/AppError';
 import type { CreateClientTargetInput, UpdateClientTargetInput, CreateCorrectionInput } from '../types';
 import { Prisma } from '@prisma/client';
 
-// Returns the Monday of the week containing the given date
-function getMondayOfWeek(date: Date): Date {
-  const d = new Date(date);
-  const day = d.getUTCDay(); // 0 = Sunday, 1 = Monday, ...
+// ---------------------------------------------------------------------------
+// Day-of-week helpers
+// ---------------------------------------------------------------------------
+
+const DAY_NAMES = ['SUN', 'MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT'] as const;
+
+/** Returns the UTC day index (0=Sun … 6=Sat) for a YYYY-MM-DD string. */
+function dayIndex(dateStr: string): number {
+  return new Date(dateStr + 'T00:00:00Z').getUTCDay();
+}
+
+/** Checks whether a day-name string (e.g. "MON") is in the working-days array. */
+function isWorkingDay(dateStr: string, workingDays: string[]): boolean {
+  return workingDays.includes(DAY_NAMES[dayIndex(dateStr)]);
+}
+
+/** Adds `n` calendar days to a YYYY-MM-DD string and returns a new YYYY-MM-DD. */
+function addDays(dateStr: string, n: number): string {
+  const d = new Date(dateStr + 'T00:00:00Z');
+  d.setUTCDate(d.getUTCDate() + n);
+  return d.toISOString().split('T')[0];
+}
+
+/** Returns the Monday of the ISO week that contains the given date string. */
+function getMondayOfWeek(dateStr: string): string {
+  const d = new Date(dateStr + 'T00:00:00Z');
+  const day = d.getUTCDay(); // 0=Sun
   const diff = day === 0 ? -6 : 1 - day;
   d.setUTCDate(d.getUTCDate() + diff);
-  d.setUTCHours(0, 0, 0, 0);
-  return d;
+  return d.toISOString().split('T')[0];
 }
 
-// Returns the Sunday (end of week) for a given Monday
-function getSundayOfWeek(monday: Date): Date {
-  const d = new Date(monday);
-  d.setUTCDate(d.getUTCDate() + 6);
-  d.setUTCHours(23, 59, 59, 999);
-  return d;
+/** Returns the Sunday of the ISO week given its Monday date string. */
+function getSundayOfWeek(monday: string): string {
+  return addDays(monday, 6);
 }
 
-// Returns all Mondays from startDate up to and including the current week's Monday
-function getWeekMondays(startDate: Date): Date[] {
-  const mondays: Date[] = [];
-  const currentMonday = getMondayOfWeek(new Date());
-  let cursor = new Date(startDate);
-  cursor.setUTCHours(0, 0, 0, 0);
-  while (cursor <= currentMonday) {
-    mondays.push(new Date(cursor));
-    cursor.setUTCDate(cursor.getUTCDate() + 7);
+/** Returns the first day of the month for a given date string. */
+function getMonthStart(dateStr: string): string {
+  return dateStr.slice(0, 7) + '-01';
+}
+
+/** Returns the last day of the month for a given date string. */
+function getMonthEnd(dateStr: string): string {
+  const d = new Date(dateStr + 'T00:00:00Z');
+  // Set to first day of next month then subtract 1 day
+  const last = new Date(Date.UTC(d.getUTCFullYear(), d.getUTCMonth() + 1, 0));
+  return last.toISOString().split('T')[0];
+}
+
+/** Total calendar days in the month containing dateStr. */
+function daysInMonth(dateStr: string): number {
+  const d = new Date(dateStr + 'T00:00:00Z');
+  return new Date(Date.UTC(d.getUTCFullYear(), d.getUTCMonth() + 1, 0)).getUTCDate();
+}
+
+/** Compare two YYYY-MM-DD strings. Returns negative, 0, or positive. */
+function cmpDate(a: string, b: string): number {
+  return a < b ? -1 : a > b ? 1 : 0;
+}
+
+// ---------------------------------------------------------------------------
+// Period enumeration
+// ---------------------------------------------------------------------------
+
+interface Period {
+  start: string; // YYYY-MM-DD
+  end: string;   // YYYY-MM-DD
+}
+
+/**
+ * Returns the period (start + end) that contains the given date.
+ * For weekly: Mon–Sun.
+ * For monthly: 1st–last day of month.
+ */
+function getPeriodForDate(dateStr: string, periodType: 'weekly' | 'monthly'): Period {
+  if (periodType === 'weekly') {
+    const monday = getMondayOfWeek(dateStr);
+    return { start: monday, end: getSundayOfWeek(monday) };
+  } else {
+    return { start: getMonthStart(dateStr), end: getMonthEnd(dateStr) };
   }
-  return mondays;
 }
 
-interface WeekBalance {
-  weekStart: string; // ISO date string (Monday)
-  weekEnd: string;   // ISO date string (Sunday)
+/**
+ * Returns the start of the NEXT period after `currentPeriodEnd`.
+ */
+function nextPeriodStart(currentPeriodEnd: string, periodType: 'weekly' | 'monthly'): string {
+  if (periodType === 'weekly') {
+    return addDays(currentPeriodEnd, 1); // Monday of next week
+  } else {
+    // First day of next month
+    const d = new Date(currentPeriodEnd + 'T00:00:00Z');
+    const next = new Date(Date.UTC(d.getUTCFullYear(), d.getUTCMonth() + 1, 1));
+    return next.toISOString().split('T')[0];
+  }
+}
+
+/**
+ * Enumerates all periods from startDate's period through today's period (inclusive).
+ */
+function enumeratePeriods(startDate: string, periodType: 'weekly' | 'monthly'): Period[] {
+  const today = new Date().toISOString().split('T')[0];
+  const periods: Period[] = [];
+
+  const firstPeriod = getPeriodForDate(startDate, periodType);
+  let cursor = firstPeriod;
+
+  while (cmpDate(cursor.start, today) <= 0) {
+    periods.push(cursor);
+    const ns = nextPeriodStart(cursor.end, periodType);
+    cursor = getPeriodForDate(ns, periodType);
+  }
+
+  return periods;
+}
+
+// ---------------------------------------------------------------------------
+// Working-day counting
+// ---------------------------------------------------------------------------
+
+/**
+ * Counts working days in [from, to] (both inclusive) matching the given pattern.
+ */
+function countWorkingDays(from: string, to: string, workingDays: string[]): number {
+  if (cmpDate(from, to) > 0) return 0;
+  let count = 0;
+  let cur = from;
+  while (cmpDate(cur, to) <= 0) {
+    if (isWorkingDay(cur, workingDays)) count++;
+    cur = addDays(cur, 1);
+  }
+  return count;
+}
+
+// ---------------------------------------------------------------------------
+// Pro-ration helpers
+// ---------------------------------------------------------------------------
+
+/**
+ * Returns the pro-rated target hours for the first period, applying §5 of the spec.
+ * If startDate falls on the natural first day of the period, no pro-ration occurs.
+ */
+function computePeriodTargetHours(
+  period: Period,
+  startDate: string,
+  targetHours: number,
+  periodType: 'weekly' | 'monthly',
+): number {
+  const naturalStart = period.start;
+  if (cmpDate(startDate, naturalStart) <= 0) {
+    // startDate is at or before the natural period start — no pro-ration needed
+    return targetHours;
+  }
+
+  // startDate is inside the period → pro-rate by calendar days
+  const fullDays = periodType === 'weekly' ? 7 : daysInMonth(period.start);
+  const remainingDays = daysBetween(startDate, period.end); // inclusive both ends
+  return (remainingDays / fullDays) * targetHours;
+}
+
+/** Calendar days between two dates (both inclusive). */
+function daysBetween(from: string, to: string): number {
+  const a = new Date(from + 'T00:00:00Z').getTime();
+  const b = new Date(to + 'T00:00:00Z').getTime();
+  return Math.round((b - a) / 86400000) + 1;
+}
+
+// ---------------------------------------------------------------------------
+// Response types
+// ---------------------------------------------------------------------------
+
+export interface PeriodBalance {
+  periodStart: string;
+  periodEnd: string;
+  targetHours: number;
   trackedSeconds: number;
-  targetSeconds: number;
   correctionHours: number;
-  balanceSeconds: number; // positive = overtime, negative = undertime
+  balanceSeconds: number;
+  isOngoing: boolean;
+  // only when isOngoing = true
+  dailyRateHours?: number;
+  workingDaysInPeriod?: number;
+  elapsedWorkingDays?: number;
+  expectedHours?: number;
 }
 
 export interface ClientTargetWithBalance {
@@ -48,7 +195,9 @@ export interface ClientTargetWithBalance {
   clientId: string;
   clientName: string;
   userId: string;
-  weeklyHours: number;
+  periodType: 'weekly' | 'monthly';
+  targetHours: number;
+  workingDays: string[];
   startDate: string;
   createdAt: string;
   updatedAt: string;
@@ -59,53 +208,91 @@ export interface ClientTargetWithBalance {
     description: string | null;
     createdAt: string;
   }>;
-  totalBalanceSeconds: number; // running total across all weeks
-  currentWeekTrackedSeconds: number;
-  currentWeekTargetSeconds: number;
-  weeks: WeekBalance[];
+  totalBalanceSeconds: number;
+  currentPeriodTrackedSeconds: number;
+  currentPeriodTargetSeconds: number;
+  periods: PeriodBalance[];
+  /** True when an active timer is running for a project belonging to this client. */
+  hasOngoingTimer: boolean;
 }
 
+// ---------------------------------------------------------------------------
+// Prisma record shape accepted by computeBalance
+// ---------------------------------------------------------------------------
+
+type TargetRecord = {
+  id: string;
+  clientId: string;
+  userId: string;
+  targetHours: number;
+  periodType: 'WEEKLY' | 'MONTHLY';
+  workingDays: string[];
+  startDate: Date;
+  createdAt: Date;
+  updatedAt: Date;
+  client: { id: string; name: string };
+  corrections: Array<{ id: string; date: Date; hours: number; description: string | null; createdAt: Date }>;
+};
+
+// ---------------------------------------------------------------------------
+// Service
+// ---------------------------------------------------------------------------
+
 export class ClientTargetService {
   async findAll(userId: string): Promise<ClientTargetWithBalance[]> {
     const targets = await prisma.clientTarget.findMany({
-      where: { userId },
+      where: { userId, deletedAt: null, client: { deletedAt: null } },
       include: {
         client: { select: { id: true, name: true } },
-        corrections: { orderBy: { date: 'asc' } },
+        corrections: { where: { deletedAt: null }, orderBy: { date: 'asc' } },
       },
       orderBy: { client: { name: 'asc' } },
     });
 
-    return Promise.all(targets.map(t => this.computeBalance(t)));
+    return Promise.all(targets.map(t => this.computeBalance(t as unknown as TargetRecord)));
   }
 
   async findById(id: string, userId: string) {
     return prisma.clientTarget.findFirst({
-      where: { id, userId },
+      where: { id, userId, deletedAt: null, client: { deletedAt: null } },
       include: {
         client: { select: { id: true, name: true } },
-        corrections: { orderBy: { date: 'asc' } },
+        corrections: { where: { deletedAt: null }, orderBy: { date: 'asc' } },
       },
     });
   }
 
   async create(userId: string, data: CreateClientTargetInput): Promise<ClientTargetWithBalance> {
-    // Validate startDate is a Monday
-    const startDate = new Date(data.startDate + 'T00:00:00Z');
-    const dayOfWeek = startDate.getUTCDay();
-    if (dayOfWeek !== 1) {
-      throw new BadRequestError('startDate must be a Monday');
-    }
-
-    // Ensure the client belongs to this user
-    const client = await prisma.client.findFirst({ where: { id: data.clientId, userId } });
+    // Ensure the client belongs to this user and is not soft-deleted
+    const client = await prisma.client.findFirst({ where: { id: data.clientId, userId, deletedAt: null } });
     if (!client) {
       throw new NotFoundError('Client not found');
     }
 
+    const startDate = new Date(data.startDate + 'T00:00:00Z');
+    const periodType = data.periodType.toUpperCase() as 'WEEKLY' | 'MONTHLY';
+
     // Check for existing target (unique per user+client)
     const existing = await prisma.clientTarget.findFirst({ where: { userId, clientId: data.clientId } });
     if (existing) {
+      if (existing.deletedAt !== null) {
+        // Reactivate the soft-deleted target with the new settings
+        const reactivated = await prisma.clientTarget.update({
+          where: { id: existing.id },
+          data: {
+            deletedAt: null,
+            targetHours: data.targetHours,
+            periodType,
+            workingDays: data.workingDays,
+            startDate,
+          },
+          include: {
+            client: { select: { id: true, name: true } },
+            corrections: { where: { deletedAt: null }, orderBy: { date: 'asc' } },
+          },
+        });
+        return this.computeBalance(reactivated as unknown as TargetRecord);
+      }
       throw new BadRequestError('A target already exists for this client. Delete the existing one first or update it.');
     }
 
@@ -113,52 +300,55 @@ export class ClientTargetService {
       data: {
         userId,
         clientId: data.clientId,
-        weeklyHours: data.weeklyHours,
+        targetHours: data.targetHours,
+        periodType,
+        workingDays: data.workingDays,
         startDate,
       },
       include: {
         client: { select: { id: true, name: true } },
-        corrections: { orderBy: { date: 'asc' } },
+        corrections: { where: { deletedAt: null }, orderBy: { date: 'asc' } },
       },
     });
 
-    return this.computeBalance(target);
+    return this.computeBalance(target as unknown as TargetRecord);
   }
 
   async update(id: string, userId: string, data: UpdateClientTargetInput): Promise<ClientTargetWithBalance> {
     const existing = await this.findById(id, userId);
     if (!existing) throw new NotFoundError('Client target not found');
 
-    const updateData: { weeklyHours?: number; startDate?: Date } = {};
+    const updateData: {
+      targetHours?: number;
+      periodType?: 'WEEKLY' | 'MONTHLY';
+      workingDays?: string[];
+      startDate?: Date;
+    } = {};
 
-    if (data.weeklyHours !== undefined) {
-      updateData.weeklyHours = data.weeklyHours;
-    }
-
-    if (data.startDate !== undefined) {
-      const startDate = new Date(data.startDate + 'T00:00:00Z');
-      if (startDate.getUTCDay() !== 1) {
-        throw new BadRequestError('startDate must be a Monday');
-      }
-      updateData.startDate = startDate;
-    }
+    if (data.targetHours !== undefined) updateData.targetHours = data.targetHours;
+    if (data.periodType !== undefined) updateData.periodType = data.periodType.toUpperCase() as 'WEEKLY' | 'MONTHLY';
+    if (data.workingDays !== undefined) updateData.workingDays = data.workingDays;
+    if (data.startDate !== undefined) updateData.startDate = new Date(data.startDate + 'T00:00:00Z');
 
     const updated = await prisma.clientTarget.update({
       where: { id },
       data: updateData,
       include: {
         client: { select: { id: true, name: true } },
-        corrections: { orderBy: { date: 'asc' } },
+        corrections: { where: { deletedAt: null }, orderBy: { date: 'asc' } },
       },
     });
 
-    return this.computeBalance(updated);
+    return this.computeBalance(updated as unknown as TargetRecord);
   }
 
   async delete(id: string, userId: string): Promise<void> {
     const existing = await this.findById(id, userId);
     if (!existing) throw new NotFoundError('Client target not found');
-    await prisma.clientTarget.delete({ where: { id } });
+    await prisma.clientTarget.update({
+      where: { id },
+      data: { deletedAt: new Date() },
+    });
   }
 
   async addCorrection(targetId: string, userId: string, data: CreateCorrectionInput) {
@@ -188,99 +378,221 @@ export class ClientTargetService {
     if (!target) throw new NotFoundError('Client target not found');
 
     const correction = await prisma.balanceCorrection.findFirst({
-      where: { id: correctionId, clientTargetId: targetId },
+      where: { id: correctionId, clientTargetId: targetId, deletedAt: null },
     });
     if (!correction) throw new NotFoundError('Correction not found');
 
-    await prisma.balanceCorrection.delete({ where: { id: correctionId } });
+    await prisma.balanceCorrection.update({
+      where: { id: correctionId },
+      data: { deletedAt: new Date() },
+    });
   }
 
-  private async computeBalance(target: {
-    id: string;
-    clientId: string;
-    userId: string;
-    weeklyHours: number;
-    startDate: Date;
-    createdAt: Date;
-    updatedAt: Date;
-    client: { id: string; name: string };
-    corrections: Array<{ id: string; date: Date; hours: number; description: string | null; createdAt: Date }>;
-  }): Promise<ClientTargetWithBalance> {
-    const mondays = getWeekMondays(target.startDate);
+  // ---------------------------------------------------------------------------
+  // Balance computation
+  // ---------------------------------------------------------------------------
 
-    if (mondays.length === 0) {
-      return this.emptyBalance(target);
+  private async computeBalance(target: TargetRecord): Promise<ClientTargetWithBalance> {
+    const startDateStr = target.startDate.toISOString().split('T')[0];
+    const periodType = target.periodType.toLowerCase() as 'weekly' | 'monthly';
+    const workingDays = target.workingDays;
+
+    const periods = enumeratePeriods(startDateStr, periodType);
+
+    if (periods.length === 0) {
+      return this.emptyBalance(target, periodType);
     }
 
-    // Fetch all tracked time for this user on this client's projects in one query
-    // covering startDate to end of current week
-    const periodStart = mondays[0];
-    const periodEnd = getSundayOfWeek(mondays[mondays.length - 1]);
+    const overallStart = periods[0].start;
+    const overallEnd = periods[periods.length - 1].end;
+    const today = new Date().toISOString().split('T')[0];
 
-    type TrackedRow = { week_start: Date; tracked_seconds: bigint };
+    // Fetch active timer for this user (if any) and check if it belongs to this client
+    const ongoingTimer = await prisma.ongoingTimer.findUnique({
+      where: { userId: target.userId },
+      include: { project: { select: { clientId: true } } },
+    });
 
-    const rows = await prisma.$queryRaw<TrackedRow[]>(Prisma.sql`
-      SELECT
-        DATE_TRUNC('week', te.start_time AT TIME ZONE 'UTC') AS week_start,
-        COALESCE(SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time))), 0)::bigint AS tracked_seconds
-      FROM time_entries te
-      JOIN projects p ON p.id = te.project_id
-      WHERE te.user_id = ${target.userId}
-        AND p.client_id = ${target.clientId}
-        AND te.start_time >= ${periodStart}
-        AND te.start_time <= ${periodEnd}
-      GROUP BY DATE_TRUNC('week', te.start_time AT TIME ZONE 'UTC')
-    `);
+    // Elapsed seconds from the active timer attributed to this client target.
+    // We only count it if the timer has a project assigned and that project
+    // belongs to the same client as this target.
+    let ongoingTimerSeconds = 0;
+    let ongoingTimerPeriodStart: string | null = null;
 
-    // Index tracked seconds by week start (ISO Monday string)
-    const trackedByWeek = new Map<string, number>();
-    for (const row of rows) {
-      // DATE_TRUNC with 'week' gives Monday in Postgres (ISO week)
-      const monday = getMondayOfWeek(new Date(row.week_start));
-      const key = monday.toISOString().split('T')[0];
-      trackedByWeek.set(key, Number(row.tracked_seconds));
+    if (
+      ongoingTimer &&
+      ongoingTimer.projectId !== null &&
+      ongoingTimer.project?.clientId === target.clientId
+    ) {
+      ongoingTimerSeconds = Math.floor(
+        (Date.now() - ongoingTimer.startTime.getTime()) / 1000,
+      );
+      // Determine which period the timer's start time falls into
+      const timerDateStr = ongoingTimer.startTime.toISOString().split('T')[0];
+      const timerPeriod = getPeriodForDate(timerDateStr, periodType);
+      ongoingTimerPeriodStart = timerPeriod.start;
     }
 
-    // Index corrections by week
-    const correctionsByWeek = new Map<string, number>();
+    // Fetch all time tracked for this client across the full range in one query
+    type TrackedRow = { period_start: string; tracked_seconds: bigint };
+
+    let trackedRows: TrackedRow[];
+    if (periodType === 'weekly') {
+      trackedRows = await prisma.$queryRaw<TrackedRow[]>(Prisma.sql`
+        SELECT
+          TO_CHAR(
+            DATE_TRUNC('week', te.start_time AT TIME ZONE 'UTC'),
+            'YYYY-MM-DD'
+          ) AS period_start,
+          COALESCE(
+            SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time)) - (te.break_minutes * 60)),
+            0
+          )::bigint AS tracked_seconds
+        FROM time_entries te
+        JOIN projects p ON p.id = te.project_id
+        WHERE te.user_id = ${target.userId}
+          AND p.client_id = ${target.clientId}
+          AND te.start_time >= ${new Date(overallStart + 'T00:00:00Z')}
+          AND te.start_time <= ${new Date(overallEnd + 'T23:59:59Z')}
+          AND te.deleted_at IS NULL
+          AND p.deleted_at IS NULL
+        GROUP BY DATE_TRUNC('week', te.start_time AT TIME ZONE 'UTC')
+      `);
+    } else {
+      trackedRows = await prisma.$queryRaw<TrackedRow[]>(Prisma.sql`
+        SELECT
+          TO_CHAR(
+            DATE_TRUNC('month', te.start_time AT TIME ZONE 'UTC'),
+            'YYYY-MM-DD'
+          ) AS period_start,
+          COALESCE(
+            SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time)) - (te.break_minutes * 60)),
+            0
+          )::bigint AS tracked_seconds
+        FROM time_entries te
+        JOIN projects p ON p.id = te.project_id
+        WHERE te.user_id = ${target.userId}
+          AND p.client_id = ${target.clientId}
+          AND te.start_time >= ${new Date(overallStart + 'T00:00:00Z')}
+          AND te.start_time <= ${new Date(overallEnd + 'T23:59:59Z')}
+          AND te.deleted_at IS NULL
+          AND p.deleted_at IS NULL
+        GROUP BY DATE_TRUNC('month', te.start_time AT TIME ZONE 'UTC')
+      `);
+    }
+
+    // Map tracked seconds by period start date string
+    const trackedByPeriod = new Map<string, number>();
+    for (const row of trackedRows) {
+      // Normalise: for weekly, Postgres DATE_TRUNC('week') already gives Monday
+      const key = typeof row.period_start === 'string'
+        ? row.period_start
+        : (row.period_start as Date).toISOString().split('T')[0];
+      trackedByPeriod.set(key, Number(row.tracked_seconds));
+    }
+
+    // Index corrections by period start date
+    const correctionsByPeriod = new Map<string, number>();
     for (const c of target.corrections) {
-      const monday = getMondayOfWeek(new Date(c.date));
-      const key = monday.toISOString().split('T')[0];
-      correctionsByWeek.set(key, (correctionsByWeek.get(key) ?? 0) + c.hours);
+      const corrDateStr = c.date.toISOString().split('T')[0];
+      const period = getPeriodForDate(corrDateStr, periodType);
+      const key = period.start;
+      correctionsByPeriod.set(key, (correctionsByPeriod.get(key) ?? 0) + c.hours);
     }
 
-    const targetSecondsPerWeek = target.weeklyHours * 3600;
-    const weeks: WeekBalance[] = [];
+    const periodBalances: PeriodBalance[] = [];
     let totalBalanceSeconds = 0;
+    const isFirstPeriod = (i: number) => i === 0;
+
+    for (let i = 0; i < periods.length; i++) {
+      const period = periods[i];
+
+      // Effective start for this period (clamped to startDate for first period)
+      const effectiveStart = isFirstPeriod(i) && cmpDate(startDateStr, period.start) > 0
+        ? startDateStr
+        : period.start;
+
+      // Period target hours (with possible pro-ration on the first period)
+      const periodTargetHours = isFirstPeriod(i)
+        ? computePeriodTargetHours(period, startDateStr, target.targetHours, periodType)
+        : target.targetHours;
+
+      // Add ongoing timer seconds to the period it started in (if it belongs to this client)
+      const timerContribution =
+        ongoingTimerPeriodStart !== null && period.start === ongoingTimerPeriodStart
+          ? ongoingTimerSeconds
+          : 0;
+
+      const trackedSeconds = (trackedByPeriod.get(period.start) ?? 0) + timerContribution;
+      const correctionHours = correctionsByPeriod.get(period.start) ?? 0;
+
+      const isOngoing = cmpDate(period.start, today) <= 0 && cmpDate(today, period.end) <= 0;
+
+      let balanceSeconds: number;
+      let extra: Partial<PeriodBalance> = {};
+
+      if (isOngoing) {
+        // §6: ongoing period — expected hours based on elapsed working days
+        const workingDaysInPeriod = countWorkingDays(effectiveStart, period.end, workingDays);
+        const dailyRateHours = workingDaysInPeriod > 0 ? periodTargetHours / workingDaysInPeriod : 0;
+
+        const elapsedEnd = today < period.end ? today : period.end;
+        const elapsedWorkingDays = countWorkingDays(effectiveStart, elapsedEnd, workingDays);
+        const expectedHours = elapsedWorkingDays * dailyRateHours;
+
+        // Only count corrections up to and including today — future corrections
+        // within the ongoing period must not be counted until those days have elapsed,
+        // otherwise a +8h correction for tomorrow inflates the balance immediately.
+        const correctionHoursToDate = target.corrections.reduce((sum, c) => {
+          const d = c.date.toISOString().split('T')[0];
+          if (cmpDate(d, effectiveStart) >= 0 && cmpDate(d, today) <= 0) {
+            return sum + c.hours;
+          }
+          return sum;
+        }, 0);
+
+        balanceSeconds = Math.round(
+          (trackedSeconds + correctionHoursToDate * 3600) - expectedHours * 3600,
+        );
+
+        extra = {
+          dailyRateHours,
+          workingDaysInPeriod,
+          elapsedWorkingDays,
+          expectedHours,
+        };
+      } else {
+        // §4: completed period — simple formula
+        balanceSeconds = Math.round(
+          (trackedSeconds + correctionHours * 3600) - periodTargetHours * 3600,
+        );
+      }
 
-    for (const monday of mondays) {
-      const key = monday.toISOString().split('T')[0];
-      const sunday = getSundayOfWeek(monday);
-      const trackedSeconds = trackedByWeek.get(key) ?? 0;
-      const correctionHours = correctionsByWeek.get(key) ?? 0;
-      const effectiveTargetSeconds = targetSecondsPerWeek - correctionHours * 3600;
-      const balanceSeconds = trackedSeconds - effectiveTargetSeconds;
       totalBalanceSeconds += balanceSeconds;
 
-      weeks.push({
-        weekStart: key,
-        weekEnd: sunday.toISOString().split('T')[0],
+      periodBalances.push({
+        periodStart: period.start,
+        periodEnd: period.end,
+        targetHours: periodTargetHours,
         trackedSeconds,
-        targetSeconds: effectiveTargetSeconds,
         correctionHours,
         balanceSeconds,
+        isOngoing,
+        ...extra,
       });
     }
 
-    const currentWeek = weeks[weeks.length - 1];
+    const currentPeriod = periodBalances.find(p => p.isOngoing) ?? periodBalances[periodBalances.length - 1];
 
     return {
       id: target.id,
       clientId: target.clientId,
       clientName: target.client.name,
       userId: target.userId,
-      weeklyHours: target.weeklyHours,
-      startDate: target.startDate.toISOString().split('T')[0],
+      periodType,
+      targetHours: target.targetHours,
+      workingDays,
+      startDate: startDateStr,
       createdAt: target.createdAt.toISOString(),
       updatedAt: target.updatedAt.toISOString(),
       corrections: target.corrections.map(c => ({
@@ -291,37 +603,33 @@ export class ClientTargetService {
         createdAt: c.createdAt.toISOString(),
       })),
       totalBalanceSeconds,
-      currentWeekTrackedSeconds: currentWeek?.trackedSeconds ?? 0,
-      currentWeekTargetSeconds: currentWeek?.targetSeconds ?? targetSecondsPerWeek,
-      weeks,
+      currentPeriodTrackedSeconds: currentPeriod?.trackedSeconds ?? 0,
+      currentPeriodTargetSeconds: currentPeriod
+        ? Math.round(currentPeriod.targetHours * 3600)
+        : Math.round(target.targetHours * 3600),
+      periods: periodBalances,
+      hasOngoingTimer: ongoingTimerSeconds > 0,
     };
   }
 
-  private emptyBalance(target: {
-    id: string;
-    clientId: string;
-    userId: string;
-    weeklyHours: number;
-    startDate: Date;
-    createdAt: Date;
-    updatedAt: Date;
-    client: { id: string; name: string };
-    corrections: Array<{ id: string; date: Date; hours: number; description: string | null; createdAt: Date }>;
-  }): ClientTargetWithBalance {
+  private emptyBalance(target: TargetRecord, periodType: 'weekly' | 'monthly'): ClientTargetWithBalance {
     return {
       id: target.id,
       clientId: target.clientId,
       clientName: target.client.name,
       userId: target.userId,
-      weeklyHours: target.weeklyHours,
+      periodType,
+      targetHours: target.targetHours,
+      workingDays: target.workingDays,
       startDate: target.startDate.toISOString().split('T')[0],
       createdAt: target.createdAt.toISOString(),
       updatedAt: target.updatedAt.toISOString(),
       corrections: [],
       totalBalanceSeconds: 0,
-      currentWeekTrackedSeconds: 0,
-      currentWeekTargetSeconds: target.weeklyHours * 3600,
-      weeks: [],
+      currentPeriodTrackedSeconds: 0,
+      currentPeriodTargetSeconds: Math.round(target.targetHours * 3600),
+      periods: [],
+      hasOngoingTimer: false,
     };
   }
 }

backend/src/services/project.service.ts

@@ -7,6 +7,8 @@ export class ProjectService {
     return prisma.project.findMany({
       where: {
         userId,
+        deletedAt: null,
+        client: { deletedAt: null },
         ...(clientId && { clientId }),
       },
       orderBy: { name: "asc" },
@@ -23,7 +25,12 @@ export class ProjectService {
 
   async findById(id: string, userId: string) {
     return prisma.project.findFirst({
-      where: { id, userId },
+      where: {
+        id,
+        userId,
+        deletedAt: null,
+        client: { deletedAt: null },
+      },
       include: {
         client: {
           select: {
@@ -36,9 +43,9 @@ export class ProjectService {
   }
 
   async create(userId: string, data: CreateProjectInput) {
-    // Verify the client belongs to the user
+    // Verify the client belongs to the user and is not soft-deleted
     const client = await prisma.client.findFirst({
-      where: { id: data.clientId, userId },
+      where: { id: data.clientId, userId, deletedAt: null },
     });
 
     if (!client) {
@@ -70,10 +77,10 @@ export class ProjectService {
       throw new NotFoundError("Project not found");
     }
 
-    // If clientId is being updated, verify it belongs to the user
+    // If clientId is being updated, verify it belongs to the user and is not soft-deleted
     if (data.clientId) {
       const client = await prisma.client.findFirst({
-        where: { id: data.clientId, userId },
+        where: { id: data.clientId, userId, deletedAt: null },
       });
 
       if (!client) {
@@ -108,8 +115,9 @@ export class ProjectService {
       throw new NotFoundError("Project not found");
     }
 
-    await prisma.project.delete({
+    await prisma.project.update({
       where: { id },
+      data: { deletedAt: new Date() },
     });
   }
 }

backend/src/services/timeEntry.service.ts

@@ -42,11 +42,15 @@ export class TimeEntryService {
           p.id   AS project_id,
           p.name AS project_name,
           p.color AS project_color,
-          COALESCE(SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time))), 0)::bigint AS total_seconds,
+          COALESCE(SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time)) - (te.break_minutes * 60)), 0)::bigint AS total_seconds,
           COUNT(te.id)::bigint AS entry_count
         FROM time_entries te
         JOIN projects p ON p.id = te.project_id
+        JOIN clients  c ON c.id = p.client_id
         WHERE te.user_id = ${userId}
+          AND te.deleted_at IS NULL
+          AND p.deleted_at IS NULL
+          AND c.deleted_at IS NULL
         ${filterClause}
         GROUP BY p.id, p.name, p.color
         ORDER BY total_seconds DESC
@@ -63,12 +67,15 @@ export class TimeEntryService {
         SELECT
           c.id   AS client_id,
           c.name AS client_name,
-          COALESCE(SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time))), 0)::bigint AS total_seconds,
+          COALESCE(SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time)) - (te.break_minutes * 60)), 0)::bigint AS total_seconds,
           COUNT(te.id)::bigint AS entry_count
         FROM time_entries te
         JOIN projects p ON p.id = te.project_id
         JOIN clients  c ON c.id = p.client_id
         WHERE te.user_id = ${userId}
+          AND te.deleted_at IS NULL
+          AND p.deleted_at IS NULL
+          AND c.deleted_at IS NULL
         ${filterClause}
         GROUP BY c.id, c.name
         ORDER BY total_seconds DESC
@@ -77,11 +84,15 @@ export class TimeEntryService {
       prisma.$queryRaw<{ total_seconds: bigint; entry_count: bigint }[]>(
         Prisma.sql`
           SELECT
-            COALESCE(SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time))), 0)::bigint AS total_seconds,
+            COALESCE(SUM(EXTRACT(EPOCH FROM (te.end_time - te.start_time)) - (te.break_minutes * 60)), 0)::bigint AS total_seconds,
             COUNT(te.id)::bigint AS entry_count
           FROM time_entries te
           JOIN projects p ON p.id = te.project_id
+          JOIN clients  c ON c.id = p.client_id
           WHERE te.user_id = ${userId}
+            AND te.deleted_at IS NULL
+            AND p.deleted_at IS NULL
+            AND c.deleted_at IS NULL
           ${filterClause}
         `,
       ),
@@ -125,10 +136,11 @@ export class TimeEntryService {
 
     const where: {
       userId: string;
+      deletedAt: null;
       startTime?: { gte?: Date; lte?: Date };
       projectId?: string;
-      project?: { clientId?: string };
-    } = { userId };
+      project?: { deletedAt: null; clientId?: string; client: { deletedAt: null } };
+    } = { userId, deletedAt: null };
 
     if (startDate || endDate) {
       where.startTime = {};
@@ -140,9 +152,13 @@ export class TimeEntryService {
       where.projectId = projectId;
     }
 
-    if (clientId) {
-      where.project = { clientId };
-    }
+    // Always filter out entries whose project or client is soft-deleted,
+    // merging the optional clientId filter into the project relation filter.
+    where.project = {
+      deletedAt: null,
+      client: { deletedAt: null },
+      ...(clientId && { clientId }),
+    };
 
     const [entries, total] = await Promise.all([
       prisma.timeEntry.findMany({
@@ -182,7 +198,12 @@ export class TimeEntryService {
 
   async findById(id: string, userId: string) {
     return prisma.timeEntry.findFirst({
-      where: { id, userId },
+      where: {
+        id,
+        userId,
+        deletedAt: null,
+        project: { deletedAt: null, client: { deletedAt: null } },
+      },
       include: {
         project: {
           select: {
@@ -204,15 +225,22 @@ export class TimeEntryService {
   async create(userId: string, data: CreateTimeEntryInput) {
     const startTime = new Date(data.startTime);
     const endTime = new Date(data.endTime);
+    const breakMinutes = data.breakMinutes ?? 0;
 
     // Validate end time is after start time
     if (endTime <= startTime) {
       throw new BadRequestError("End time must be after start time");
     }
 
-    // Verify the project belongs to the user
+    // Validate break time doesn't exceed duration
+    const durationMinutes = (endTime.getTime() - startTime.getTime()) / 60000;
+    if (breakMinutes > durationMinutes) {
+      throw new BadRequestError("Break time cannot exceed total duration");
+    }
+
+    // Verify the project belongs to the user and is not soft-deleted (nor its client)
     const project = await prisma.project.findFirst({
-      where: { id: data.projectId, userId },
+      where: { id: data.projectId, userId, deletedAt: null, client: { deletedAt: null } },
     });
 
     if (!project) {
@@ -235,6 +263,7 @@ export class TimeEntryService {
       data: {
         startTime,
         endTime,
+        breakMinutes,
         description: data.description,
         userId,
         projectId: data.projectId,
@@ -267,16 +296,23 @@ export class TimeEntryService {
       ? new Date(data.startTime)
       : entry.startTime;
     const endTime = data.endTime ? new Date(data.endTime) : entry.endTime;
+    const breakMinutes = data.breakMinutes ?? entry.breakMinutes;
 
     // Validate end time is after start time
     if (endTime <= startTime) {
       throw new BadRequestError("End time must be after start time");
     }
 
-    // If project changed, verify it belongs to the user
+    // Validate break time doesn't exceed duration
+    const durationMinutes = (endTime.getTime() - startTime.getTime()) / 60000;
+    if (breakMinutes > durationMinutes) {
+      throw new BadRequestError("Break time cannot exceed total duration");
+    }
+
+    // If project changed, verify it belongs to the user and is not soft-deleted
     if (data.projectId && data.projectId !== entry.projectId) {
       const project = await prisma.project.findFirst({
-        where: { id: data.projectId, userId },
+        where: { id: data.projectId, userId, deletedAt: null, client: { deletedAt: null } },
       });
 
       if (!project) {
@@ -302,6 +338,7 @@ export class TimeEntryService {
       data: {
         startTime,
         endTime,
+        breakMinutes,
         description: data.description,
         projectId: data.projectId,
       },
@@ -329,8 +366,9 @@ export class TimeEntryService {
       throw new NotFoundError("Time entry not found");
     }
 
-    await prisma.timeEntry.delete({
+    await prisma.timeEntry.update({
       where: { id },
+      data: { deletedAt: new Date() },
     });
   }
 }

backend/src/services/timer.service.ts

@@ -102,9 +102,24 @@ export class TimerService {
       projectId = data.projectId;
     }
 
+    // Validate startTime if provided
+    let startTime: Date | undefined = undefined;
+    if (data.startTime) {
+      const parsed = new Date(data.startTime);
+      const now = new Date();
+      if (parsed >= now) {
+        throw new BadRequestError("Start time must be in the past");
+      }
+      startTime = parsed;
+    }
+
+    const updateData: Record<string, unknown> = {};
+    if (projectId !== undefined) updateData.projectId = projectId;
+    if (startTime !== undefined) updateData.startTime = startTime;
+
     return prisma.ongoingTimer.update({
       where: { userId },
-      data: projectId !== undefined ? { projectId } : {},
+      data: updateData,
       include: {
         project: {
           select: {
@@ -123,6 +138,15 @@ export class TimerService {
     });
   }
 
+  async cancel(userId: string) {
+    const timer = await this.getOngoingTimer(userId);
+    if (!timer) {
+      throw new NotFoundError("No timer is running");
+    }
+
+    await prisma.ongoingTimer.delete({ where: { userId } });
+  }
+
   async stop(userId: string, data?: StopTimerInput) {
     const timer = await this.getOngoingTimer(userId);
     if (!timer) {

backend/src/types/index.ts

@@ -31,13 +31,14 @@ export interface CreateProjectInput {
 export interface UpdateProjectInput {
   name?: string;
   description?: string;
-  color?: string;
+  color?: string | null;
   clientId?: string;
 }
 
 export interface CreateTimeEntryInput {
   startTime: string;
   endTime: string;
+  breakMinutes?: number;
   description?: string;
   projectId: string;
 }
@@ -45,6 +46,7 @@ export interface CreateTimeEntryInput {
 export interface UpdateTimeEntryInput {
   startTime?: string;
   endTime?: string;
+  breakMinutes?: number;
   description?: string;
   projectId?: string;
 }
@@ -71,6 +73,7 @@ export interface StartTimerInput {
 
 export interface UpdateTimerInput {
   projectId?: string | null;
+  startTime?: string;
 }
 
 export interface StopTimerInput {
@@ -79,13 +82,17 @@ export interface StopTimerInput {
 
 export interface CreateClientTargetInput {
   clientId: string;
-  weeklyHours: number;
-  startDate: string; // YYYY-MM-DD, always a Monday
+  targetHours: number;
+  periodType: 'weekly' | 'monthly';
+  workingDays: string[]; // e.g. ["MON","WED","FRI"]
+  startDate: string; // YYYY-MM-DD
 }
 
 export interface UpdateClientTargetInput {
-  weeklyHours?: number;
-  startDate?: string; // YYYY-MM-DD, always a Monday
+  targetHours?: number;
+  periodType?: 'weekly' | 'monthly';
+  workingDays?: string[];
+  startDate?: string; // YYYY-MM-DD
 }
 
 export interface CreateCorrectionInput {

backend/src/utils/timeUtils.ts

@@ -19,6 +19,7 @@ export async function hasOverlappingEntries(
   const count = await prisma.timeEntry.count({
     where: {
       userId,
+      deletedAt: null,
       ...(excludeId ? { id: { not: excludeId } } : {}),
       // An entry overlaps when it starts before our end AND ends after our start.
       startTime: { lt: endTime },

docs/client-targets-v2-requirements.md

@@ -0,0 +1,285 @@
+# Client Targets v2 — Feature Requirements
+
+## Overview
+
+This document defines the requirements for the second iteration of the Client Targets feature. The main additions are:
+
+- Targets can be set on a **weekly or monthly** period.
+- Each target defines a **fixed weekly working-day pattern** (e.g. Mon + Wed).
+- The balance for the **current period** is calculated proportionally based on elapsed working days, so the user can see at any point in time whether they are ahead or behind.
+- The **start date** can be any calendar day (no longer restricted to Mondays).
+- Manual **balance corrections** are preserved and continue to work as before.
+
+---
+
+## 1. Target Configuration
+
+| Field | Type | Constraints |
+|---|---|---|
+| `periodType` | `WEEKLY \| MONTHLY` | Required |
+| `weeklyOrMonthlyHours` | positive float, ≤ 168 | Required; represents hours per week or per month |
+| `workingDays` | array of day names | At least one of `MON TUE WED THU FRI SAT SUN`; fixed repeating pattern |
+| `startDate` | `YYYY-MM-DD` | Any calendar day; no longer restricted to Mondays |
+| `clientId` | UUID | Must belong to the authenticated user |
+
+**One active target per client** — the unique `(userId, clientId)` constraint is preserved. To change period type, hours, or working days the user creates a new target with a new `startDate`; the old target is soft-deleted. History from the old target is retained as-is and is no longer recalculated.
+
+---
+
+## 2. Period Definitions
+
+| `periodType` | Period start | Period end |
+|---|---|---|
+| `WEEKLY` | Monday 00:00 of the calendar week | Sunday 23:59 of that same calendar week |
+| `MONTHLY` | 1st of the calendar month 00:00 | Last day of the calendar month 23:59 |
+
+---
+
+## 3. Balance Calculation — Overview
+
+The total balance is the **sum of individual period balances** from the period containing `startDate` up to and including the **current period** (the period that contains today).
+
+Each period is classified as either **completed** or **ongoing**.
+
+```
+total_balance_seconds = SUM( balance_seconds ) over all periods
+```
+
+Positive = overtime. Negative = undertime.
+
+---
+
+## 4. Completed Period Balance
+
+A period is **completed** when its end date is strictly before today.
+
+```
+balance = tracked_hours + correction_hours - period_target_hours
+```
+
+- `period_target_hours` — see §5 (pro-ration) for the first period; full `weeklyOrMonthlyHours` for all subsequent periods.
+- `tracked_hours` — sum of all time entries for this client whose date falls within `[period_start, period_end]`.
+- `correction_hours` — sum of manual corrections whose `date` falls within `[period_start, period_end]`.
+
+No working-day logic is applied to completed periods. The target is simply the (optionally pro-rated) hours for that period.
+
+---
+
+## 5. First Period Pro-ration
+
+If `startDate` does not fall on the natural first day of a period (Monday for weekly, 1st for monthly), the target hours for that first period are pro-rated by calendar days.
+
+### Monthly
+
+```
+full_period_days      = total calendar days in that month
+remaining_days        = (last day of month) − startDate + 1   // inclusive
+period_target_hours   = (remaining_days / full_period_days) × weeklyOrMonthlyHours
+```
+
+**Example:** startDate = Jan 25, target = 40 h/month, January has 31 days.
+`remaining_days = 7`, `period_target_hours = (7 / 31) × 40 = 9.032 h`
+
+### Weekly
+
+```
+full_period_days      = 7
+remaining_days        = Sunday of that calendar week − startDate + 1   // inclusive
+period_target_hours   = (remaining_days / 7) × weeklyOrMonthlyHours
+```
+
+**Example:** startDate = Wednesday, target = 40 h/week.
+`remaining_days = 5 (Wed–Sun)`, `period_target_hours = (5 / 7) × 40 = 28.571 h`
+
+All periods after the first use the full `weeklyOrMonthlyHours`.
+
+---
+
+## 6. Ongoing Period Balance (Current Period)
+
+The current period is **ongoing** when today falls within it. The balance reflects how the user is doing *so far* — future working days within the current period are not considered.
+
+### Step 1 — Period target hours
+
+Apply §5 if this is the first period; otherwise use full `weeklyOrMonthlyHours`.
+
+### Step 2 — Daily rate
+
+```
+working_days_in_period = COUNT of days in [period_start, period_end]
+                         that match the working day pattern
+daily_rate_hours       = period_target_hours / working_days_in_period
+```
+
+The rate is fixed at the start of the period and does not change as time passes.
+
+### Step 3 — Elapsed working days
+
+```
+elapsed_working_days = COUNT of days in [period_start, TODAY] (both inclusive)
+                       that match the working day pattern
+```
+
+- If today matches the working day pattern, it is counted as a **full** elapsed working day.
+- If today does not match the working day pattern, it is not counted.
+
+### Step 4 — Expected hours so far
+
+```
+expected_hours = elapsed_working_days × daily_rate_hours
+```
+
+### Step 5 — Balance
+
+```
+tracked_hours    = SUM of time entries for this client in [period_start, today]
+correction_hours = SUM of manual corrections whose date ∈ [period_start, today]
+balance          = tracked_hours + correction_hours − expected_hours
+```
+
+### Worked example
+
+> Target: 40 h/month. Working days: Mon + Wed.
+> Current month has 4 Mondays and 4 Wednesdays → `working_days_in_period = 8`.
+> `daily_rate_hours = 40 / 8 = 5 h`.
+> 3 working days have elapsed → `expected_hours = 15 h`.
+> Tracked so far: 13 h, no corrections.
+> `balance = 13 − 15 = −2 h` (2 hours behind).
+
+---
+
+## 7. Manual Balance Corrections
+
+| Field | Type | Constraints |
+|---|---|---|
+| `date` | `YYYY-MM-DD` | Must be ≥ `startDate`; not more than one period in the future |
+| `hours` | signed float | Positive = extra credit (reduces deficit). Negative = reduces tracked credit |
+| `description` | string | Optional, max 255 chars |
+
+- The system automatically assigns a correction to the period that contains its `date`.
+- Corrections in **completed periods** are included in the completed period formula (§4).
+- Corrections in the **ongoing period** are included in the ongoing balance formula (§6).
+- Corrections in a **future period** (not yet started) are stored and will be applied when that period becomes active.
+- A correction whose `date` is before `startDate` is rejected with a validation error.
+
+---
+
+## 8. Edge Cases
+
+| Scenario | Behaviour |
+|---|---|
+| `startDate` = 1st of month / Monday | No pro-ration; `period_target_hours = weeklyOrMonthlyHours` |
+| `startDate` = last day of period | `remaining_days = 1`; target is heavily reduced (e.g. 1/31 × hours) |
+| Working pattern has no matches in the partial first period | `elapsed_working_days = 0`; `expected_hours = 0`; balance = `tracked + corrections` |
+| Current period has zero elapsed working days | `expected_hours = 0`; balance = `tracked + corrections` (cannot divide by zero — guard required) |
+| `working_days_in_period = 0` | Impossible by validation (at least one day required), but system must guard: treat as `daily_rate_hours = 0` |
+| Today is not a working day | `elapsed_working_days` does not include today |
+| Correction date before `startDate` | Rejected with a validation error |
+| Correction date in future period | Accepted and stored; applied when that period is ongoing or completed |
+| User changes working days or period type | Must create a new target with a new `startDate`; old target history is frozen |
+| Two periods with the same client exist (old soft-deleted, new active) | Only the active target's periods contribute to the displayed balance |
+| A month with only partial working day coverage (e.g. all Mondays are public holidays) | No automatic holiday handling; user adds manual corrections to compensate |
+
+---
+
+## 9. Data Model Changes
+
+### `ClientTarget` table — additions / changes
+
+| Column | Change | Notes |
+|---|---|---|
+| `period_type` | **Add** | Enum: `WEEKLY`, `MONTHLY` |
+| `working_days` | **Add** | Array/bitmask of day names: `MON TUE WED THU FRI SAT SUN` |
+| `start_date` | **Modify** | Remove "must be Monday" validation constraint |
+| `weekly_hours` | **Rename** | → `target_hours` (represents hours per week or per month depending on `period_type`) |
+
+### `BalanceCorrection` table — no structural changes
+
+Date-to-period assignment is computed at query time, not stored.
+
+---
+
+## 10. API Changes
+
+### `ClientTargetWithBalance` response shape
+
+```typescript
+interface ClientTargetWithBalance {
+  id: string
+  clientId: string
+  clientName: string
+  userId: string
+  periodType: "weekly" | "monthly"
+  targetHours: number                     // renamed from weeklyHours
+  workingDays: string[]                   // e.g. ["MON", "WED"]
+  startDate: string                       // YYYY-MM-DD
+  createdAt: string
+  updatedAt: string
+  corrections: BalanceCorrection[]
+  totalBalanceSeconds: number             // running total across all periods
+  currentPeriodTrackedSeconds: number     // replaces currentWeekTrackedSeconds
+  currentPeriodTargetSeconds: number      // replaces currentWeekTargetSeconds
+  periods: PeriodBalance[]                // replaces weeks[]
+}
+
+interface PeriodBalance {
+  periodStart: string                     // YYYY-MM-DD (Monday or 1st of month)
+  periodEnd: string                       // YYYY-MM-DD (Sunday or last of month)
+  targetHours: number                     // pro-rated for first period
+  trackedSeconds: number
+  correctionHours: number
+  balanceSeconds: number
+  isOngoing: boolean
+  // only present when isOngoing = true
+  dailyRateHours?: number
+  workingDaysInPeriod?: number
+  elapsedWorkingDays?: number
+  expectedHours?: number
+}
+```
+
+### Endpoint changes
+
+| Method | Path | Change |
+|---|---|---|
+| `POST /client-targets` | Create | Accepts `periodType`, `workingDays`, `targetHours`; `startDate` unconstrained |
+| `PUT /client-targets/:id` | Update | Accepts same new fields |
+| `GET /client-targets` | List | Returns updated `ClientTargetWithBalance` shape |
+| `POST /client-targets/:id/corrections` | Add correction | No change to signature |
+| `DELETE /client-targets/:id/corrections/:corrId` | Delete correction | No change |
+
+### Zod schema changes
+
+- `CreateClientTargetSchema` / `UpdateClientTargetSchema`:
+  - Add `periodType: z.enum(["weekly", "monthly"])`
+  - Add `workingDays: z.array(z.enum(["MON","TUE","WED","THU","FRI","SAT","SUN"])).min(1)`
+  - Rename `weeklyHours` → `targetHours`
+  - Remove Monday-only regex constraint from `startDate`
+
+---
+
+## 11. Frontend Changes
+
+### Types (`frontend/src/types/index.ts`)
+- `ClientTargetWithBalance` — add `periodType`, `workingDays`, `targetHours`; replace `weeks` → `periods: PeriodBalance[]`; replace `currentWeek*` → `currentPeriod*`
+- Add `PeriodBalance` interface
+- `CreateClientTargetInput` / `UpdateClientTargetInput` — same field additions
+
+### Hook (`frontend/src/hooks/useClientTargets.ts`)
+- No structural changes; mutations pass through new fields
+
+### API client (`frontend/src/api/clientTargets.ts`)
+- No structural changes; payload shapes updated
+
+### `ClientsPage` — `ClientTargetPanel`
+- Working day selector (checkboxes: Mon–Sun, at least one required)
+- Period type selector (Weekly / Monthly)
+- Label for hours input updates dynamically: "Hours/week" or "Hours/month"
+- Start date picker: free date input (no week-picker)
+- Balance display: label changes from "this week" to "this week" or "this month" based on `periodType`
+- Expanded period list replaces the expanded week list
+
+### `DashboardPage`
+- "Weekly Targets" widget renamed to "Targets"
+- "This week" label becomes "This week" / "This month" dynamically
+- `currentWeek*` fields replaced with `currentPeriod*`

frontend/index.html

@@ -2,7 +2,7 @@
 <html lang="en">
   <head>
     <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>TimeTracker</title>
   </head>

frontend/public/favicon.svg

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated by Pixelmator Pro 4.0 -->
+<svg width="416" height="416" viewBox="0 0 416 416" xmlns="http://www.w3.org/2000/svg">
+    <linearGradient id="linearGradient1" x1="0" y1="0" x2="416" y2="416" gradientUnits="userSpaceOnUse">
+        <stop offset="1e-05" stop-color="#818cf8" stop-opacity="1"/>
+        <stop offset="1" stop-color="#4f46e5" stop-opacity="1"/>
+    </linearGradient>
+    <path id="Path" fill="url(#linearGradient1)" stroke="none" d="M 96 0 L 320 0 C 373.019348 0 416 42.980652 416 96 L 416 320 C 416 373.019348 373.019348 416 320 416 L 96 416 C 42.980667 416 0 373.019348 0 320 L 0 96 C 0 42.980652 42.980667 0 96 0 Z"/>
+    <g id="Group">
+        <path id="path1" fill="none" stroke="#ffffff" stroke-width="28" stroke-linecap="round" stroke-linejoin="round" d="M 208 48 L 208 92"/>
+        <path id="path2" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 176 40 L 240 40"/>
+        <path id="path3" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 304 128 L 328 104"/>
+        <path id="path4" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 314 90 L 342 118"/>
+        <path id="path5" fill="none" stroke="#ffffff" stroke-width="28" stroke-linecap="round" stroke-linejoin="round" d="M 340 224 C 340 296.901581 280.901581 356 208 356 C 135.098419 356 76 296.901581 76 224 C 76 151.098419 135.098419 92 208 92 C 280.901581 92 340 151.098419 340 224 Z"/>
+        <path id="path6" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 208 136 L 208 224"/>
+        <path id="path7" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 208 224 L 256 256"/>
+        <g id="g1" opacity="0.6">
+            <path id="path8" fill="none" stroke="#ffffff" stroke-width="12" stroke-linecap="round" stroke-linejoin="round" d="M 208 308 L 208 324"/>
+            <path id="path9" fill="none" stroke="#ffffff" stroke-width="12" stroke-linecap="round" stroke-linejoin="round" d="M 124 224 L 140 224"/>
+            <path id="path10" fill="none" stroke="#ffffff" stroke-width="12" stroke-linecap="round" stroke-linejoin="round" d="M 292 224 L 276 224"/>
+        </g>
+    </g>
+</svg>

frontend/public/icon.svg

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated by Pixelmator Pro 4.0 -->
+<svg width="512" height="512" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg">
+    <linearGradient id="linearGradient1" x1="48" y1="48" x2="464" y2="464" gradientUnits="userSpaceOnUse">
+        <stop offset="1e-05" stop-color="#818cf8" stop-opacity="1"/>
+        <stop offset="1" stop-color="#4f46e5" stop-opacity="1"/>
+    </linearGradient>
+    <filter id="filter1" x="0" y="0" width="512" height="512" filterUnits="userSpaceOnUse" primitiveUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
+        <feGaussianBlur stdDeviation="16"/>
+        <feOffset dx="0" dy="12" result="offsetblur"/>
+        <feFlood flood-color="#4f46e5" flood-opacity="0.4"/>
+        <feComposite in2="offsetblur" operator="in"/>
+        <feMerge>
+            <feMergeNode/>
+            <feMergeNode in="SourceGraphic"/>
+        </feMerge>
+    </filter>
+    <path id="Path" fill="url(#linearGradient1)" stroke="none" filter="url(#filter1)" d="M 144 48 L 368 48 C 421.019348 48 464 90.980652 464 144 L 464 368 C 464 421.019348 421.019348 464 368 464 L 144 464 C 90.980667 464 48 421.019348 48 368 L 48 144 C 48 90.980652 90.980667 48 144 48 Z"/>
+    <g id="Group">
+        <path id="path1" fill="none" stroke="#ffffff" stroke-width="28" stroke-linecap="round" stroke-linejoin="round" d="M 256 96 L 256 140"/>
+        <path id="path2" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 224 88 L 288 88"/>
+        <path id="path3" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 352 176 L 376 152"/>
+        <path id="path4" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 362 138 L 390 166"/>
+        <path id="path5" fill="none" stroke="#ffffff" stroke-width="28" stroke-linecap="round" stroke-linejoin="round" d="M 388 272 C 388 344.901581 328.901581 404 256 404 C 183.098419 404 124 344.901581 124 272 C 124 199.098419 183.098419 140 256 140 C 328.901581 140 388 199.098419 388 272 Z"/>
+        <path id="path6" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 256 184 L 256 272"/>
+        <path id="path7" fill="none" stroke="#ffffff" stroke-width="24" stroke-linecap="round" stroke-linejoin="round" d="M 256 272 L 304 304"/>
+        <g id="g1" opacity="0.6">
+            <path id="path8" fill="none" stroke="#ffffff" stroke-width="12" stroke-linecap="round" stroke-linejoin="round" d="M 256 356 L 256 372"/>
+            <path id="path9" fill="none" stroke="#ffffff" stroke-width="12" stroke-linecap="round" stroke-linejoin="round" d="M 172 272 L 188 272"/>
+            <path id="path10" fill="none" stroke="#ffffff" stroke-width="12" stroke-linecap="round" stroke-linejoin="round" d="M 340 272 L 324 272"/>
+        </g>
+    </g>
+</svg>

frontend/src/App.tsx

@@ -10,6 +10,7 @@ import { TimeEntriesPage } from "./pages/TimeEntriesPage";
 import { ClientsPage } from "./pages/ClientsPage";
 import { ProjectsPage } from "./pages/ProjectsPage";
 import { StatisticsPage } from "./pages/StatisticsPage";
+import { ApiKeysPage } from "./pages/ApiKeysPage";
 
 function App() {
   return (
@@ -33,6 +34,7 @@ function App() {
           <Route path="clients" element={<ClientsPage />} />
           <Route path="projects" element={<ProjectsPage />} />
           <Route path="statistics" element={<StatisticsPage />} />
+          <Route path="api-keys" element={<ApiKeysPage />} />
         </Route>
       </Routes>
     </AuthProvider>

frontend/src/api/apiKeys.ts

@@ -0,0 +1,18 @@
+import apiClient from './client';
+import type { ApiKey, CreatedApiKey, CreateApiKeyInput } from '@/types';
+
+export const apiKeysApi = {
+  getAll: async (): Promise<ApiKey[]> => {
+    const { data } = await apiClient.get<ApiKey[]>('/api-keys');
+    return data;
+  },
+
+  create: async (input: CreateApiKeyInput): Promise<CreatedApiKey> => {
+    const { data } = await apiClient.post<CreatedApiKey>('/api-keys', input);
+    return data;
+  },
+
+  delete: async (id: string): Promise<void> => {
+    await apiClient.delete(`/api-keys/${id}`);
+  },
+};

frontend/src/api/timer.ts

@@ -1,6 +1,11 @@
 import apiClient from './client';
 import type { OngoingTimer, TimeEntry } from '@/types';
 
+export interface UpdateTimerPayload {
+  projectId?: string | null;
+  startTime?: string;
+}
+
 export const timerApi = {
   getOngoing: async (): Promise<OngoingTimer | null> => {
     const { data } = await apiClient.get<OngoingTimer | null>('/timer');
@@ -14,10 +19,8 @@ export const timerApi = {
     return data;
   },
 
-  update: async (projectId?: string | null): Promise<OngoingTimer> => {
-    const { data } = await apiClient.put<OngoingTimer>('/timer', {
-      projectId,
-    });
+  update: async (payload: UpdateTimerPayload): Promise<OngoingTimer> => {
+    const { data } = await apiClient.put<OngoingTimer>('/timer', payload);
     return data;
   },
 
@@ -27,4 +30,8 @@ export const timerApi = {
     });
     return data;
   },
+
+  cancel: async (): Promise<void> => {
+    await apiClient.delete('/timer');
+  },
 };

frontend/src/components/Layout.tsx

@@ -4,9 +4,9 @@ import { TimerWidget } from './TimerWidget';
 
 export function Layout() {
   return (
-    <div className="min-h-screen bg-gray-50">
+    <div className="h-[100vh] w-[100vw] flex flex-col bg-gray-50">
       <Navbar />
-      <main className="pt-4 pb-24">
+      <main className="pt-4 pb-8 grow overflow-auto">
         <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
           <Outlet />
         </div>

frontend/src/components/Navbar.tsx

@@ -8,6 +8,7 @@ import {
   LogOut,
   ChevronDown,
   Settings,
+  Key,
 } from "lucide-react";
 import { useAuth } from "@/contexts/AuthContext";
 import { useState, useRef, useEffect } from "react";
@@ -40,6 +41,7 @@ export function Navbar() {
   const managementItems = [
     { to: "/clients", label: "Clients", icon: Briefcase },
     { to: "/projects", label: "Projects", icon: FolderOpen },
+    { to: "/api-keys", label: "API Keys", icon: Key },
   ];
 
   return (
@@ -47,20 +49,27 @@ export function Navbar() {
       <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
         <div className="flex justify-between h-16">
           <div className="flex">
-            <div className="flex-shrink-0 flex items-center">
-              <Clock className="h-8 w-8 text-primary-600" />
+            <NavLink
+              className="flex-shrink-0 flex items-center"
+              to={"/dashboard"}
+            >
+              <img
+                src="/icon.svg"
+                alt="TimeTracker Logo"
+                className="h-8 w-8 drop-shadow-sm"
+              />
               <span className="ml-2 text-xl font-bold text-gray-900">
                 TimeTracker
               </span>
-            </div>
-            <div className="hidden sm:ml-8 sm:flex sm:space-x-4">
+            </NavLink>
+            <div className="hidden sm:ml-8 sm:flex sm:space-x-4 items-center">
               {/* Main Navigation Items */}
               {mainNavItems.map((item) => (
                 <NavLink
                   key={item.to}
                   to={item.to}
                   className={({ isActive }) =>
-                    `inline-flex items-center px-3 py-2 text-sm font-medium rounded-md transition-colors ${
+                    `inline-flex items-center px-3 py-2 text-sm font-medium rounded-md transition-colors h-min ${
                       isActive
                         ? "text-primary-600 bg-primary-50"
                         : "text-gray-600 hover:text-gray-900 hover:bg-gray-50"

frontend/src/components/StatCard.tsx

@@ -3,25 +3,35 @@ interface StatCardProps {
   label: string;
   value: string;
   color: 'blue' | 'green' | 'purple' | 'orange';
+  /** When true, renders a pulsing green dot to signal a live/active state. */
+  indicator?: boolean;
 }
 
-const colorClasses: Record<StatCardProps['color'], string> = {
+const colorClasses: Record<NonNullable<StatCardProps['color']>, string> = {
   blue: 'bg-blue-50 text-blue-600',
   green: 'bg-green-50 text-green-600',
   purple: 'bg-purple-50 text-purple-600',
   orange: 'bg-orange-50 text-orange-600',
 };
 
-export function StatCard({ icon: Icon, label, value, color }: StatCardProps) {
+export function StatCard({ icon: Icon, label, value, color, indicator }: StatCardProps) {
   return (
     <div className="card p-4">
       <div className="flex items-center">
         <div className={`p-3 rounded-lg ${colorClasses[color]}`}>
           <Icon className="h-6 w-6" />
         </div>
-        <div className="ml-4">
+        <div className="ml-4 flex-1">
           <p className="text-sm font-medium text-gray-600">{label}</p>
-          <p className="text-2xl font-bold text-gray-900">{value}</p>
+          <div className="flex items-center gap-2">
+            {indicator && (
+              <span
+                className="inline-block h-2.5 w-2.5 rounded-full bg-red-500 animate-pulse"
+                title="Timer running"
+              />
+            )}
+            <p className="text-2xl font-bold text-gray-900">{value}</p>
+          </div>
         </div>
       </div>
     </div>

frontend/src/components/TimeEntryFormModal.tsx

@@ -20,6 +20,7 @@ export function TimeEntryFormModal({ entry, onClose, createTimeEntry, updateTime
       return {
         startTime: getLocalISOString(new Date(entry.startTime)),
         endTime: getLocalISOString(new Date(entry.endTime)),
+        breakMinutes: entry.breakMinutes,
         description: entry.description || '',
         projectId: entry.projectId,
       };
@@ -29,6 +30,7 @@ export function TimeEntryFormModal({ entry, onClose, createTimeEntry, updateTime
     return {
       startTime: getLocalISOString(oneHourAgo),
       endTime: getLocalISOString(now),
+      breakMinutes: 0,
       description: '',
       projectId: projects?.[0]?.id || '',
     };
@@ -97,6 +99,16 @@ export function TimeEntryFormModal({ entry, onClose, createTimeEntry, updateTime
             />
           </div>
         </div>
+        <div>
+          <label className="label">Break (minutes)</label>
+          <input
+            type="number"
+            min="0"
+            value={formData.breakMinutes ?? 0}
+            onChange={(e) => setFormData({ ...formData, breakMinutes: parseInt(e.target.value) || 0 })}
+            className="input"
+          />
+        </div>
         <div>
           <label className="label">Description</label>
           <textarea

frontend/src/components/TimerWidget.tsx

@@ -1,5 +1,5 @@
-import { useState } from "react";
-import { Play, Square, ChevronDown } from "lucide-react";
+import { useState, useRef } from "react";
+import { Play, Square, ChevronDown, Pencil, Check, X, Trash2 } from "lucide-react";
 import { useTimer } from "@/contexts/TimerContext";
 import { useProjects } from "@/hooks/useProjects";
 import { ProjectColorDot } from "@/components/ProjectColorDot";
@@ -27,6 +27,21 @@ function TimerDisplay({ totalSeconds }: { totalSeconds: number }) {
   );
 }
 
+/** Converts a HH:mm string to an ISO datetime, inferring the correct date.
+ *  If the resulting time would be in the future, it is assumed to belong to the previous day.
+ */
+function timeInputToIso(timeValue: string): string {
+  const [hours, minutes] = timeValue.split(":").map(Number);
+  const now = new Date();
+  const candidate = new Date(now);
+  candidate.setHours(hours, minutes, 0, 0);
+  // If the candidate is in the future, roll back one day
+  if (candidate > now) {
+    candidate.setDate(candidate.getDate() - 1);
+  }
+  return candidate.toISOString();
+}
+
 export function TimerWidget() {
   const {
     ongoingTimer,
@@ -34,12 +49,19 @@ export function TimerWidget() {
     elapsedSeconds,
     startTimer,
     stopTimer,
+    cancelTimer,
     updateTimerProject,
+    updateTimerStartTime,
   } = useTimer();
   const { projects } = useProjects();
   const [showProjectSelect, setShowProjectSelect] = useState(false);
   const [error, setError] = useState<string | null>(null);
 
+  // Start time editing state
+  const [editingStartTime, setEditingStartTime] = useState(false);
+  const [startTimeInput, setStartTimeInput] = useState("");
+  const startTimeInputRef = useRef<HTMLInputElement>(null);
+
   const handleStart = async () => {
     setError(null);
     try {
@@ -58,6 +80,15 @@ export function TimerWidget() {
     }
   };
 
+  const handleCancelTimer = async () => {
+    setError(null);
+    try {
+      await cancelTimer();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to cancel timer");
+    }
+  };
+
   const handleProjectChange = async (projectId: string) => {
     setError(null);
     try {
@@ -78,9 +109,45 @@ export function TimerWidget() {
     }
   };
 
+  const handleStartEditStartTime = () => {
+    if (!ongoingTimer) return;
+    const start = new Date(ongoingTimer.startTime);
+    const hh = start.getHours().toString().padStart(2, "0");
+    const mm = start.getMinutes().toString().padStart(2, "0");
+    setStartTimeInput(`${hh}:${mm}`);
+    setEditingStartTime(true);
+    // Focus the input on next render
+    setTimeout(() => startTimeInputRef.current?.focus(), 0);
+  };
+
+  const handleCancelEditStartTime = () => {
+    setEditingStartTime(false);
+    setError(null);
+  };
+
+  const handleConfirmStartTime = async () => {
+    if (!startTimeInput) return;
+    setError(null);
+    try {
+      const iso = timeInputToIso(startTimeInput);
+      await updateTimerStartTime(iso);
+      setEditingStartTime(false);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Failed to update start time");
+    }
+  };
+
+  const handleStartTimeKeyDown = (e: React.KeyboardEvent<HTMLInputElement>) => {
+    if (e.key === "Enter") {
+      void handleConfirmStartTime();
+    } else if (e.key === "Escape") {
+      handleCancelEditStartTime();
+    }
+  };
+
   if (isLoading) {
     return (
-      <div className="fixed bottom-0 left-0 right-0 bg-white border-t border-gray-200 py-4 shadow-lg">
+      <div className="bg-white border-t border-gray-200 py-4 shadow-lg">
         <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 flex items-center justify-center">
           <div className="animate-spin rounded-full h-6 w-6 border-b-2 border-primary-600"></div>
         </div>
@@ -89,26 +156,74 @@ export function TimerWidget() {
   }
 
   return (
-    <div className="fixed bottom-0 left-0 right-0 bg-white border-t border-gray-200 py-4 shadow-lg z-50">
+    <div className="bg-white border-t border-gray-200 py-4 shadow-lg">
       <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 flex flex-wrap sm:flex-nowrap items-center gap-2 sm:justify-between">
         {ongoingTimer ? (
           <>
             {/* Row 1 (mobile): timer + stop side by side. On sm+ dissolves into the parent flex row via contents. */}
             <div className="flex items-center justify-between w-full sm:contents">
-              {/* Timer Display */}
+              {/* Timer Display + Start Time Editor */}
               <div className="flex items-center space-x-2 shrink-0">
                 <div className="w-3 h-3 bg-red-500 rounded-full animate-pulse"></div>
-                <TimerDisplay totalSeconds={elapsedSeconds} />
+                {editingStartTime ? (
+                  <div className="flex items-center space-x-1">
+                    <span className="text-xs text-gray-500 mr-1">Started at</span>
+                    <input
+                      ref={startTimeInputRef}
+                      type="time"
+                      value={startTimeInput}
+                      onChange={(e) => setStartTimeInput(e.target.value)}
+                      onKeyDown={handleStartTimeKeyDown}
+                      className="font-mono text-lg font-bold text-gray-900 border border-primary-400 rounded px-2 py-0.5 focus:outline-none focus:ring-2 focus:ring-primary-500 w-28"
+                    />
+                    <button
+                      onClick={() => void handleConfirmStartTime()}
+                      title="Confirm"
+                      className="p-1 text-green-600 hover:text-green-700 hover:bg-green-50 rounded"
+                    >
+                      <Check className="h-4 w-4" />
+                    </button>
+                    <button
+                      onClick={handleCancelEditStartTime}
+                      title="Cancel"
+                      className="p-1 text-gray-400 hover:text-gray-600 hover:bg-gray-100 rounded"
+                    >
+                      <X className="h-4 w-4" />
+                    </button>
+                  </div>
+                ) : (
+                  <div className="flex items-center space-x-2">
+                    <TimerDisplay totalSeconds={elapsedSeconds} />
+                    <button
+                      onClick={handleStartEditStartTime}
+                      title="Adjust start time"
+                      className="p-1 text-gray-400 hover:text-gray-600 hover:bg-gray-100 rounded transition-colors"
+                    >
+                      <Pencil className="h-3.5 w-3.5" />
+                    </button>
+                  </div>
+                )}
               </div>
 
-              {/* Stop Button */}
-              <button
-                onClick={handleStop}
-                className="flex items-center space-x-2 px-6 py-3 bg-red-600 text-white rounded-lg font-medium hover:bg-red-700 transition-colors shrink-0 sm:order-last"
-              >
-                <Square className="h-5 w-5 fill-current" />
-                <span>Stop</span>
-              </button>
+              {/* Stop + Cancel Buttons */}
+              <div className="flex items-center space-x-2 shrink-0 sm:order-last">
+                <button
+                  onClick={() => void handleCancelTimer()}
+                  title="Discard timer"
+                  className="p-2 text-gray-400 hover:text-gray-600 hover:bg-gray-100 rounded-lg transition-colors"
+                >
+                  <Trash2 className="h-5 w-5" />
+                </button>
+                <button
+                  onClick={handleStop}
+                  disabled={!ongoingTimer.project}
+                  title={!ongoingTimer.project ? "Select a project to stop the timer" : undefined}
+                  className="flex items-center space-x-2 px-6 py-3 bg-red-600 text-white rounded-lg font-medium hover:bg-red-700 transition-colors disabled:opacity-40 disabled:cursor-not-allowed disabled:hover:bg-red-600"
+                >
+                  <Square className="h-5 w-5 fill-current" />
+                  <span>Stop</span>
+                </button>
+              </div>
             </div>
 
             {/* Project Selector — full width on mobile, auto on desktop */}

frontend/src/contexts/TimerContext.tsx

@@ -17,6 +17,8 @@ interface TimerContextType {
   elapsedSeconds: number;
   startTimer: (projectId?: string) => Promise<void>;
   updateTimerProject: (projectId?: string | null) => Promise<void>;
+  updateTimerStartTime: (startTime: string) => Promise<void>;
+  cancelTimer: () => Promise<void>;
   stopTimer: (projectId?: string) => Promise<TimeEntry | null>;
 }
 
@@ -84,6 +86,14 @@ export function TimerProvider({ children }: { children: ReactNode }) {
     },
   });
 
+  // Cancel timer mutation
+  const cancelMutation = useMutation({
+    mutationFn: timerApi.cancel,
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["ongoingTimer"] });
+    },
+  });
+
   // Stop timer mutation
   const stopMutation = useMutation({
     mutationFn: timerApi.stop,
@@ -102,11 +112,22 @@ export function TimerProvider({ children }: { children: ReactNode }) {
 
   const updateTimerProject = useCallback(
     async (projectId?: string | null) => {
-      await updateMutation.mutateAsync(projectId);
+      await updateMutation.mutateAsync({ projectId });
     },
     [updateMutation],
   );
 
+  const updateTimerStartTime = useCallback(
+    async (startTime: string) => {
+      await updateMutation.mutateAsync({ startTime });
+    },
+    [updateMutation],
+  );
+
+  const cancelTimer = useCallback(async () => {
+    await cancelMutation.mutateAsync();
+  }, [cancelMutation]);
+
   const stopTimer = useCallback(
     async (projectId?: string): Promise<TimeEntry | null> => {
       try {
@@ -127,6 +148,8 @@ export function TimerProvider({ children }: { children: ReactNode }) {
         elapsedSeconds,
         startTimer,
         updateTimerProject,
+        updateTimerStartTime,
+        cancelTimer,
         stopTimer,
       }}
     >

frontend/src/hooks/useApiKeys.ts

@@ -0,0 +1,34 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { apiKeysApi } from '@/api/apiKeys';
+import type { CreateApiKeyInput } from '@/types';
+
+export function useApiKeys() {
+  const queryClient = useQueryClient();
+
+  const { data: apiKeys, isLoading, error } = useQuery({
+    queryKey: ['apiKeys'],
+    queryFn: apiKeysApi.getAll,
+  });
+
+  const createApiKey = useMutation({
+    mutationFn: (input: CreateApiKeyInput) => apiKeysApi.create(input),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['apiKeys'] });
+    },
+  });
+
+  const deleteApiKey = useMutation({
+    mutationFn: (id: string) => apiKeysApi.delete(id),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['apiKeys'] });
+    },
+  });
+
+  return {
+    apiKeys,
+    isLoading,
+    error,
+    createApiKey,
+    deleteApiKey,
+  };
+}

frontend/src/hooks/useClientTargets.ts

@@ -1,5 +1,6 @@
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { clientTargetsApi } from '@/api/clientTargets';
+import { useTimer } from '@/contexts/TimerContext';
 import type {
   CreateClientTargetInput,
   UpdateClientTargetInput,
@@ -8,10 +9,13 @@ import type {
 
 export function useClientTargets() {
   const queryClient = useQueryClient();
+  const { ongoingTimer } = useTimer();
 
   const { data: targets, isLoading, error } = useQuery({
     queryKey: ['clientTargets'],
     queryFn: clientTargetsApi.getAll,
+    // Poll every 30 s while a timer is running so the balance stays current
+    refetchInterval: ongoingTimer ? 30_000 : false,
   });
 
   const createTarget = useMutation({

frontend/src/pages/ApiKeysPage.tsx

@@ -0,0 +1,243 @@
+import { useState } from "react";
+import { Key, Plus, Trash2, Copy, Check, AlertTriangle } from "lucide-react";
+import { useApiKeys } from "@/hooks/useApiKeys";
+import type { CreatedApiKey } from "@/types";
+
+export function ApiKeysPage() {
+  const { apiKeys, isLoading, error, createApiKey, deleteApiKey } = useApiKeys();
+
+  const [showCreateModal, setShowCreateModal] = useState(false);
+  const [newKeyName, setNewKeyName] = useState("");
+  const [createError, setCreateError] = useState<string | null>(null);
+  const [createdKey, setCreatedKey] = useState<CreatedApiKey | null>(null);
+  const [copiedKey, setCopiedKey] = useState(false);
+  const [revokeConfirmId, setRevokeConfirmId] = useState<string | null>(null);
+
+  function formatDate(dateStr: string | null) {
+    if (!dateStr) return "Never";
+    return new Date(dateStr).toLocaleString();
+  }
+
+  async function handleCreate() {
+    if (!newKeyName.trim()) return;
+    setCreateError(null);
+    try {
+      const key = await createApiKey.mutateAsync({ name: newKeyName.trim() });
+      setCreatedKey(key);
+      setNewKeyName("");
+    } catch (err) {
+      setCreateError(err instanceof Error ? err.message : "An error occurred");
+    }
+  }
+
+  async function handleCopyKey() {
+    if (!createdKey) return;
+    await navigator.clipboard.writeText(createdKey.rawKey);
+    setCopiedKey(true);
+    setTimeout(() => setCopiedKey(false), 2000);
+  }
+
+  function handleCloseCreateModal() {
+    setShowCreateModal(false);
+    setCreatedKey(null);
+    setNewKeyName("");
+    setCreateError(null);
+    setCopiedKey(false);
+  }
+
+  async function handleRevoke(id: string) {
+    try {
+      await deleteApiKey.mutateAsync(id);
+      setRevokeConfirmId(null);
+    } catch (_err) {
+      // error rendered below the table row via deleteApiKey.error
+    }
+  }
+
+  return (
+    <div className="max-w-4xl mx-auto py-8 px-4">
+      <div className="flex items-center justify-between mb-6">
+        <div className="flex items-center gap-3">
+          <Key className="h-6 w-6 text-gray-600" />
+          <h1 className="text-2xl font-bold text-gray-900">API Keys</h1>
+        </div>
+        <button
+          onClick={() => setShowCreateModal(true)}
+          className="inline-flex items-center gap-2 px-4 py-2 bg-primary-600 text-white text-sm font-medium rounded-lg hover:bg-primary-700 transition-colors"
+        >
+          <Plus className="h-4 w-4" />
+          Create API Key
+        </button>
+      </div>
+
+      <p className="text-sm text-gray-500 mb-6">
+        API keys allow agents and external tools to authenticate with the TimeTracker API and MCP endpoint.
+        The raw key is only shown once at creation time — store it securely.
+      </p>
+
+      {error && (
+        <div className="mb-4 p-3 bg-red-50 border border-red-200 rounded-lg text-red-700 text-sm">
+          {error instanceof Error ? error.message : "Failed to load API keys"}
+        </div>
+      )}
+
+      {deleteApiKey.isError && (
+        <div className="mb-4 p-3 bg-red-50 border border-red-200 rounded-lg text-red-700 text-sm">
+          {deleteApiKey.error instanceof Error
+            ? deleteApiKey.error.message
+            : "Failed to revoke API key"}
+        </div>
+      )}
+
+      {isLoading ? (
+        <div className="text-center py-12 text-gray-400 text-sm">Loading...</div>
+      ) : !apiKeys || apiKeys.length === 0 ? (
+        <div className="text-center py-12 border border-dashed border-gray-300 rounded-lg">
+          <Key className="h-10 w-10 text-gray-300 mx-auto mb-3" />
+          <p className="text-gray-500 text-sm">No API keys yet. Create one to get started.</p>
+        </div>
+      ) : (
+        <div className="border border-gray-200 rounded-lg overflow-hidden">
+          <table className="w-full text-sm">
+            <thead className="bg-gray-50 border-b border-gray-200">
+              <tr>
+                <th className="px-4 py-3 text-left font-medium text-gray-600">Name</th>
+                <th className="px-4 py-3 text-left font-medium text-gray-600">Prefix</th>
+                <th className="px-4 py-3 text-left font-medium text-gray-600">Created</th>
+                <th className="px-4 py-3 text-left font-medium text-gray-600">Last Used</th>
+                <th className="px-4 py-3 text-right font-medium text-gray-600">Actions</th>
+              </tr>
+            </thead>
+            <tbody className="divide-y divide-gray-100">
+              {apiKeys.map((key) => (
+                <tr key={key.id} className="hover:bg-gray-50">
+                  <td className="px-4 py-3 font-medium text-gray-900">{key.name}</td>
+                  <td className="px-4 py-3">
+                    <code className="text-xs bg-gray-100 px-2 py-1 rounded font-mono text-gray-700">
+                      {key.prefix}…
+                    </code>
+                  </td>
+                  <td className="px-4 py-3 text-gray-500">{formatDate(key.createdAt)}</td>
+                  <td className="px-4 py-3 text-gray-500">{formatDate(key.lastUsedAt)}</td>
+                  <td className="px-4 py-3 text-right">
+                    {revokeConfirmId === key.id ? (
+                      <div className="inline-flex items-center gap-2">
+                        <span className="text-xs text-red-600">Revoke?</span>
+                        <button
+                          onClick={() => handleRevoke(key.id)}
+                          disabled={deleteApiKey.isPending}
+                          className="text-xs px-2 py-1 bg-red-600 text-white rounded hover:bg-red-700 transition-colors disabled:opacity-50"
+                        >
+                          Yes
+                        </button>
+                        <button
+                          onClick={() => setRevokeConfirmId(null)}
+                          className="text-xs px-2 py-1 border border-gray-300 rounded hover:bg-gray-50 transition-colors"
+                        >
+                          Cancel
+                        </button>
+                      </div>
+                    ) : (
+                      <button
+                        onClick={() => setRevokeConfirmId(key.id)}
+                        className="inline-flex items-center gap-1 px-2 py-1 text-red-600 hover:text-red-800 hover:bg-red-50 rounded transition-colors"
+                        title="Revoke key"
+                      >
+                        <Trash2 className="h-4 w-4" />
+                        <span>Revoke</span>
+                      </button>
+                    )}
+                  </td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      {/* Create API Key Modal */}
+      {showCreateModal && (
+        <div className="fixed inset-0 bg-black/40 flex items-center justify-center z-50 p-4">
+          <div className="bg-white rounded-xl shadow-xl w-full max-w-md">
+            <div className="px-6 py-4 border-b border-gray-200">
+              <h2 className="text-lg font-semibold text-gray-900">Create API Key</h2>
+            </div>
+
+            <div className="px-6 py-5">
+              {createdKey ? (
+                /* One-time key reveal */
+                <div className="space-y-4">
+                  <div className="flex items-start gap-3 p-3 bg-amber-50 border border-amber-200 rounded-lg">
+                    <AlertTriangle className="h-5 w-5 text-amber-500 flex-shrink-0 mt-0.5" />
+                    <p className="text-sm text-amber-800">
+                      Copy this key now. <strong>It will not be shown again.</strong>
+                    </p>
+                  </div>
+                  <div>
+                    <label className="block text-xs font-medium text-gray-500 mb-1">Your new API key</label>
+                    <div className="flex items-center gap-2">
+                      <code className="flex-1 text-xs bg-gray-100 border border-gray-200 rounded-lg px-3 py-2 font-mono text-gray-900 break-all">
+                        {createdKey.rawKey}
+                      </code>
+                      <button
+                        onClick={handleCopyKey}
+                        className="flex-shrink-0 p-2 border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
+                        title="Copy to clipboard"
+                      >
+                        {copiedKey ? (
+                          <Check className="h-4 w-4 text-green-600" />
+                        ) : (
+                          <Copy className="h-4 w-4 text-gray-500" />
+                        )}
+                      </button>
+                    </div>
+                  </div>
+                </div>
+              ) : (
+                /* Name input form */
+                <div className="space-y-4">
+                  <div>
+                    <label htmlFor="key-name" className="block text-sm font-medium text-gray-700 mb-1">
+                      Key name
+                    </label>
+                    <input
+                      id="key-name"
+                      type="text"
+                      value={newKeyName}
+                      onChange={(e) => setNewKeyName(e.target.value)}
+                      onKeyDown={(e) => e.key === "Enter" && handleCreate()}
+                      placeholder="e.g. My Claude Agent"
+                      className="w-full px-3 py-2 border border-gray-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-primary-500 focus:border-transparent"
+                      autoFocus
+                    />
+                  </div>
+                  {createError && (
+                    <p className="text-red-600 text-sm">{createError}</p>
+                  )}
+                </div>
+              )}
+            </div>
+
+            <div className="px-6 py-4 border-t border-gray-200 flex justify-end gap-3">
+              <button
+                onClick={handleCloseCreateModal}
+                className="px-4 py-2 text-sm font-medium border border-gray-300 rounded-lg hover:bg-gray-50 transition-colors"
+              >
+                {createdKey ? "Done" : "Cancel"}
+              </button>
+              {!createdKey && (
+                <button
+                  onClick={handleCreate}
+                  disabled={!newKeyName.trim() || createApiKey.isPending}
+                  className="px-4 py-2 text-sm font-medium bg-primary-600 text-white rounded-lg hover:bg-primary-700 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
+                >
+                  {createApiKey.isPending ? "Creating..." : "Create"}
+                </button>
+              )}
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/pages/ClientsPage.tsx

@@ -14,33 +14,10 @@ import type {
   CreateCorrectionInput,
 } from '@/types';
 
-// Convert a <input type="week"> value like "2026-W07" to the Monday date "2026-02-16"
-function weekInputToMonday(weekValue: string): string {
-  const [yearStr, weekStr] = weekValue.split('-W');
-  const year = parseInt(yearStr, 10);
-  const week = parseInt(weekStr, 10);
-  // ISO week 1 is the week containing the first Thursday of January
-  const jan4 = new Date(Date.UTC(year, 0, 4));
-  const jan4Day = jan4.getUTCDay() || 7; // Mon=1..Sun=7
-  const monday = new Date(jan4);
-  monday.setUTCDate(jan4.getUTCDate() - jan4Day + 1 + (week - 1) * 7);
-  return monday.toISOString().split('T')[0];
-}
-
-// Convert a YYYY-MM-DD Monday to "YYYY-Www" for the week input
-function mondayToWeekInput(dateStr: string): string {
-  const date = new Date(dateStr + 'T00:00:00Z');
-  // ISO week number calculation
-  const jan4 = new Date(Date.UTC(date.getUTCFullYear(), 0, 4));
-  const jan4Day = jan4.getUTCDay() || 7;
-  const firstMonday = new Date(jan4);
-  firstMonday.setUTCDate(jan4.getUTCDate() - jan4Day + 1);
-  const diff = date.getTime() - firstMonday.getTime();
-  const week = Math.floor(diff / (7 * 24 * 3600 * 1000)) + 1;
-  // Handle year boundary: if week > 52 we might be in week 1 of next year
-  const year = date.getUTCFullYear();
-  return `${year}-W${week.toString().padStart(2, '0')}`;
-}
+const ALL_DAYS = ['MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT', 'SUN'] as const;
+const DAY_LABELS: Record<string, string> = {
+  MON: 'Mon', TUE: 'Tue', WED: 'Wed', THU: 'Thu', FRI: 'Fri', SAT: 'Sat', SUN: 'Sun',
+};
 
 function balanceLabel(seconds: number): { text: string; color: string } {
   if (seconds === 0) return { text: '±0', color: 'text-gray-500' };
@@ -58,7 +35,12 @@ function ClientTargetPanel({
 }: {
   client: Client;
   target: ClientTargetWithBalance | undefined;
-  onCreated: (weeklyHours: number, startDate: string) => Promise<void>;
+  onCreated: (input: {
+    targetHours: number;
+    periodType: 'weekly' | 'monthly';
+    workingDays: string[];
+    startDate: string;
+  }) => Promise<void>;
   onDeleted: () => Promise<void>;
 }) {
   const { addCorrection, deleteCorrection, updateTarget } = useClientTargets();
@@ -69,7 +51,9 @@ function ClientTargetPanel({
 
   // Create/edit form state
   const [formHours, setFormHours] = useState('');
-  const [formWeek, setFormWeek] = useState('');
+  const [formPeriodType, setFormPeriodType] = useState<'weekly' | 'monthly'>('weekly');
+  const [formWorkingDays, setFormWorkingDays] = useState<string[]>(['MON', 'TUE', 'WED', 'THU', 'FRI']);
+  const [formStartDate, setFormStartDate] = useState('');
   const [formError, setFormError] = useState<string | null>(null);
   const [formSaving, setFormSaving] = useState(false);
 
@@ -81,13 +65,13 @@ function ClientTargetPanel({
   const [corrError, setCorrError] = useState<string | null>(null);
   const [corrSaving, setCorrSaving] = useState(false);
 
+  const todayIso = new Date().toISOString().split('T')[0];
+
   const openCreate = () => {
     setFormHours('');
-    const today = new Date();
-    const day = today.getUTCDay() || 7;
-    const monday = new Date(today);
-    monday.setUTCDate(today.getUTCDate() - day + 1);
-    setFormWeek(mondayToWeekInput(monday.toISOString().split('T')[0]));
+    setFormPeriodType('weekly');
+    setFormWorkingDays(['MON', 'TUE', 'WED', 'THU', 'FRI']);
+    setFormStartDate(todayIso);
     setFormError(null);
     setEditing(false);
     setShowForm(true);
@@ -95,32 +79,56 @@ function ClientTargetPanel({
 
   const openEdit = () => {
     if (!target) return;
-    setFormHours(String(target.weeklyHours));
-    setFormWeek(mondayToWeekInput(target.startDate));
+    setFormHours(String(target.targetHours));
+    setFormPeriodType(target.periodType);
+    setFormWorkingDays([...target.workingDays]);
+    setFormStartDate(target.startDate);
     setFormError(null);
     setEditing(true);
     setShowForm(true);
   };
 
+  const toggleDay = (day: string) => {
+    setFormWorkingDays(prev =>
+      prev.includes(day) ? prev.filter(d => d !== day) : [...prev, day],
+    );
+  };
+
   const handleFormSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
     setFormError(null);
     const hours = parseFloat(formHours);
     if (isNaN(hours) || hours <= 0 || hours > 168) {
-      setFormError('Weekly hours must be between 0 and 168');
+      setFormError(`${formPeriodType === 'weekly' ? 'Weekly' : 'Monthly'} hours must be between 0 and 168`);
       return;
     }
-    if (!formWeek) {
-      setFormError('Please select a start week');
+    if (formWorkingDays.length === 0) {
+      setFormError('Select at least one working day');
+      return;
+    }
+    if (!formStartDate) {
+      setFormError('Please select a start date');
       return;
     }
-    const startDate = weekInputToMonday(formWeek);
     setFormSaving(true);
     try {
       if (editing && target) {
-        await updateTarget.mutateAsync({ id: target.id, input: { weeklyHours: hours, startDate } });
+        await updateTarget.mutateAsync({
+          id: target.id,
+          input: {
+            targetHours: hours,
+            periodType: formPeriodType,
+            workingDays: formWorkingDays,
+            startDate: formStartDate,
+          },
+        });
       } else {
-        await onCreated(hours, startDate);
+        await onCreated({
+          targetHours: hours,
+          periodType: formPeriodType,
+          workingDays: formWorkingDays,
+          startDate: formStartDate,
+        });
       }
       setShowForm(false);
     } catch (err) {
@@ -185,23 +193,46 @@ function ClientTargetPanel({
           className="flex items-center gap-1.5 text-xs text-primary-600 hover:text-primary-700 font-medium"
         >
           <Target className="h-3.5 w-3.5" />
-          Set weekly target
+          Set target
         </button>
       </div>
     );
   }
 
   if (showForm) {
+    const hoursLabel = formPeriodType === 'weekly' ? 'Hours/week' : 'Hours/month';
     return (
       <div className="mt-3 pt-3 border-t border-gray-100">
         <p className="text-xs font-medium text-gray-700 mb-2">
-          {editing ? 'Edit target' : 'Set weekly target'}
+          {editing ? 'Edit target' : 'Set target'}
         </p>
         <form onSubmit={handleFormSubmit} className="space-y-2">
           {formError && <p className="text-xs text-red-600">{formError}</p>}
+
+          {/* Period type */}
+          <div>
+            <label className="block text-xs text-gray-500 mb-0.5">Period</label>
+            <div className="flex gap-2">
+              {(['weekly', 'monthly'] as const).map(pt => (
+                <label key={pt} className="flex items-center gap-1 text-xs cursor-pointer">
+                  <input
+                    type="radio"
+                    name="periodType"
+                    value={pt}
+                    checked={formPeriodType === pt}
+                    onChange={() => setFormPeriodType(pt)}
+                    className="accent-primary-600"
+                  />
+                  {pt.charAt(0).toUpperCase() + pt.slice(1)}
+                </label>
+              ))}
+            </div>
+          </div>
+
+          {/* Hours + Start Date */}
           <div className="flex gap-2">
             <div className="flex-1">
-              <label className="block text-xs text-gray-500 mb-0.5">Hours/week</label>
+              <label className="block text-xs text-gray-500 mb-0.5">{hoursLabel}</label>
               <input
                 type="number"
                 value={formHours}
@@ -215,16 +246,41 @@ function ClientTargetPanel({
               />
             </div>
             <div className="flex-1">
-              <label className="block text-xs text-gray-500 mb-0.5">Starting week</label>
+              <label className="block text-xs text-gray-500 mb-0.5">Start date</label>
               <input
-                type="week"
-                value={formWeek}
-                onChange={e => setFormWeek(e.target.value)}
+                type="date"
+                value={formStartDate}
+                onChange={e => setFormStartDate(e.target.value)}
                 className="input text-sm py-1"
                 required
               />
             </div>
           </div>
+
+          {/* Working days */}
+          <div>
+            <label className="block text-xs text-gray-500 mb-0.5">Working days</label>
+            <div className="flex gap-1 flex-wrap">
+              {ALL_DAYS.map(day => {
+                const active = formWorkingDays.includes(day);
+                return (
+                  <button
+                    key={day}
+                    type="button"
+                    onClick={() => toggleDay(day)}
+                    className={`text-xs px-2 py-0.5 rounded border font-medium transition-colors ${
+                      active
+                        ? 'bg-primary-600 border-primary-600 text-white'
+                        : 'bg-white border-gray-300 text-gray-600 hover:border-primary-400'
+                    }`}
+                  >
+                    {DAY_LABELS[day]}
+                  </button>
+                );
+              })}
+            </div>
+          </div>
+
           <div className="flex gap-2 justify-end">
             <button
               type="button"
@@ -248,6 +304,7 @@ function ClientTargetPanel({
 
   // Target exists — show summary + expandable details
   const balance = balanceLabel(target!.totalBalanceSeconds);
+  const periodLabel = target!.periodType === 'weekly' ? 'week' : 'month';
 
   return (
     <div className="mt-3 pt-3 border-t border-gray-100">
@@ -256,9 +313,15 @@ function ClientTargetPanel({
         <div className="flex items-center gap-2">
           <Target className="h-3.5 w-3.5 text-gray-400 shrink-0" />
           <span className="text-xs text-gray-600">
-            <span className="font-medium">{target!.weeklyHours}h</span>/week
+            <span className="font-medium">{target!.targetHours}h</span>/{periodLabel}
           </span>
           <span className={`text-xs font-semibold ${balance.color}`}>{balance.text}</span>
+          {target!.hasOngoingTimer && (
+            <span
+              className="inline-block h-2 w-2 rounded-full bg-green-500 animate-pulse"
+              title="Timer running — balance updates every 30 s"
+            />
+          )}
         </div>
         <div className="flex items-center gap-1">
           <button
@@ -531,8 +594,14 @@ export function ClientsPage() {
                 <ClientTargetPanel
                   client={client}
                   target={target}
-                  onCreated={async (weeklyHours, startDate) => {
-                    await createTarget.mutateAsync({ clientId: client.id, weeklyHours, startDate });
+                  onCreated={async ({ targetHours, periodType, workingDays, startDate }) => {
+                    await createTarget.mutateAsync({
+                      clientId: client.id,
+                      targetHours,
+                      periodType,
+                      workingDays,
+                      startDate,
+                    });
                   }}
                   onDeleted={async () => {
                     if (target) await deleteTarget.mutateAsync(target.id);

frontend/src/pages/DashboardPage.tsx

@@ -3,6 +3,7 @@ import { Link } from "react-router-dom";
 import { Clock, Calendar, Briefcase, TrendingUp, Target, Edit2, Trash2 } from "lucide-react";
 import { useTimeEntries } from "@/hooks/useTimeEntries";
 import { useClientTargets } from "@/hooks/useClientTargets";
+import { useTimer } from "@/contexts/TimerContext";
 import { ProjectColorDot } from "@/components/ProjectColorDot";
 import { StatCard } from "@/components/StatCard";
 import { TimeEntryFormModal } from "@/components/TimeEntryFormModal";
@@ -30,6 +31,7 @@ export function DashboardPage() {
   });
 
   const { targets } = useClientTargets();
+  const { ongoingTimer, elapsedSeconds } = useTimer();
 
   const [isModalOpen, setIsModalOpen] = useState(false);
   const [editingEntry, setEditingEntry] = useState<TimeEntry | null>(null);
@@ -54,12 +56,19 @@ export function DashboardPage() {
     }
   };
 
-  const totalTodaySeconds =
+  const completedTodaySeconds =
     todayEntries?.entries.reduce((total, entry) => {
-      return total + calculateDuration(entry.startTime, entry.endTime);
-    }, 0) || 0;
+      return total + calculateDuration(entry.startTime, entry.endTime, entry.breakMinutes);
+    }, 0) ?? 0;
 
-  const targetsWithData = targets?.filter(t => t.weeks.length > 0) ?? [];
+  // Only add the running timer if it started today (not a timer left running from yesterday)
+  const timerStartedToday =
+    ongoingTimer !== null &&
+    new Date(ongoingTimer.startTime) >= startOfDay(today);
+
+  const totalTodaySeconds = completedTodaySeconds + (timerStartedToday ? elapsedSeconds : 0);
+
+  const targetsWithData = targets?.filter(t => t.periods.length > 0) ?? [];
 
   return (
     <div className="space-y-6">
@@ -78,6 +87,7 @@ export function DashboardPage() {
           label="Today"
           value={formatDurationHoursMinutes(totalTodaySeconds)}
           color="blue"
+          indicator={timerStartedToday}
         />
         <StatCard
           icon={Calendar}
@@ -108,7 +118,7 @@ export function DashboardPage() {
         <div className="card">
           <div className="flex items-center gap-2 mb-4">
             <Target className="h-5 w-5 text-primary-600" />
-            <h2 className="text-lg font-semibold text-gray-900">Weekly Targets</h2>
+            <h2 className="text-lg font-semibold text-gray-900">Targets</h2>
           </div>
           <div className="space-y-3">
             {targetsWithData.map(target => {
@@ -116,8 +126,9 @@ export function DashboardPage() {
               const absBalance = Math.abs(balance);
               const isOver = balance > 0;
               const isEven = balance === 0;
-              const currentWeekTracked = formatDurationHoursMinutes(target.currentWeekTrackedSeconds);
-              const currentWeekTarget = formatDurationHoursMinutes(target.currentWeekTargetSeconds);
+              const currentPeriodTracked = formatDurationHoursMinutes(target.currentPeriodTrackedSeconds);
+              const currentPeriodTarget = formatDurationHoursMinutes(target.currentPeriodTargetSeconds);
+              const periodLabel = target.periodType === 'weekly' ? 'This week' : 'This month';
 
               return (
                 <div
@@ -127,23 +138,31 @@ export function DashboardPage() {
                   <div>
                     <p className="text-sm font-medium text-gray-900">{target.clientName}</p>
                     <p className="text-xs text-gray-500 mt-0.5">
-                      This week: {currentWeekTracked} / {currentWeekTarget}
-                    </p>
+                        {periodLabel}: {currentPeriodTracked} / {currentPeriodTarget}
+                      </p>
                   </div>
                   <div className="text-right">
-                    <p
-                      className={`text-sm font-bold ${
-                        isEven
-                          ? 'text-gray-500'
-                          : isOver
-                          ? 'text-green-600'
-                          : 'text-red-600'
-                      }`}
-                    >
-                      {isEven
-                        ? '±0'
-                        : (isOver ? '+' : '−') + formatDurationHoursMinutes(absBalance)}
-                    </p>
+                    <div className="flex items-center justify-end gap-1.5">
+                      {target.hasOngoingTimer && (
+                        <span
+                          className="inline-block h-2 w-2 rounded-full bg-red-500 animate-pulse"
+                          title="Timer running — balance updates every 30 s"
+                        />
+                      )}
+                      <p
+                        className={`text-sm font-bold ${
+                          isEven
+                            ? 'text-gray-500'
+                            : isOver
+                            ? 'text-green-600'
+                            : 'text-red-600'
+                        }`}
+                      >
+                        {isEven
+                          ? '±0'
+                          : (isOver ? '+' : '−') + formatDurationHoursMinutes(absBalance)}
+                      </p>
+                    </div>
                     <p className="text-xs text-gray-400">running balance</p>
                   </div>
                 </div>
@@ -216,7 +235,10 @@ export function DashboardPage() {
                       <div className="text-xs text-gray-400">{formatTime(entry.startTime)} – {formatTime(entry.endTime)}</div>
                     </td>
                     <td className="px-4 py-3 whitespace-nowrap text-sm text-gray-900 font-mono">
-                      {formatDurationFromDatesHoursMinutes(entry.startTime, entry.endTime)}
+                      {formatDurationFromDatesHoursMinutes(entry.startTime, entry.endTime, entry.breakMinutes)}
+                      {entry.breakMinutes > 0 && (
+                        <span className="text-xs text-gray-400 ml-1">(−{entry.breakMinutes}m break)</span>
+                      )}
                     </td>
                     <td className="px-4 py-3 whitespace-nowrap text-right">
                       <button onClick={() => handleOpenModal(entry)} className="p-1.5 text-gray-400 hover:text-gray-600 mr-1"><Edit2 className="h-4 w-4" /></button>

frontend/src/pages/LoginPage.tsx

@@ -1,4 +1,3 @@
-import { Clock } from 'lucide-react';
 import { useAuth } from '@/contexts/AuthContext';
 
 export function LoginPage() {
@@ -8,8 +7,8 @@ export function LoginPage() {
     <div className="min-h-screen flex items-center justify-center bg-gray-50">
       <div className="max-w-md w-full space-y-8 p-8">
         <div className="text-center">
-          <div className="mx-auto h-16 w-16 bg-primary-100 rounded-full flex items-center justify-center">
-            <Clock className="h-8 w-8 text-primary-600" />
+          <div className="mx-auto h-16 w-16 flex items-center justify-center drop-shadow-sm">
+            <img src="/icon.svg" alt="TimeTracker Logo" className="h-16 w-16" />
           </div>
           <h2 className="mt-6 text-3xl font-bold text-gray-900">TimeTracker</h2>
           <p className="mt-2 text-sm text-gray-600">

frontend/src/pages/TimeEntriesPage.tsx

@@ -78,7 +78,10 @@ export function TimeEntriesPage() {
                   </div>
                 </td>
                 <td className="px-4 py-3 whitespace-nowrap text-sm font-mono text-gray-900">
-                  {formatDurationFromDatesHoursMinutes(entry.startTime, entry.endTime)}
+                  {formatDurationFromDatesHoursMinutes(entry.startTime, entry.endTime, entry.breakMinutes)}
+                  {entry.breakMinutes > 0 && (
+                    <span className="text-xs text-gray-400 ml-1">(−{entry.breakMinutes}m)</span>
+                  )}
                 </td>
                 <td className="px-4 py-3 whitespace-nowrap text-right">
                   <button onClick={() => handleOpenModal(entry)} className="p-1.5 text-gray-400 hover:text-gray-600 mr-1"><Edit2 className="h-4 w-4" /></button>

frontend/src/types/index.ts

@@ -11,6 +11,7 @@ export interface Client {
   description: string | null;
   createdAt: string;
   updatedAt: string;
+  deletedAt: string | null;
 }
 
 export interface Project {
@@ -22,12 +23,14 @@ export interface Project {
   client: Pick<Client, 'id' | 'name'>;
   createdAt: string;
   updatedAt: string;
+  deletedAt: string | null;
 }
 
 export interface TimeEntry {
   id: string;
   startTime: string;
   endTime: string;
+  breakMinutes: number;
   description: string | null;
   projectId: string;
   project: Pick<Project, 'id' | 'name' | 'color'> & {
@@ -35,6 +38,7 @@ export interface TimeEntry {
   };
   createdAt: string;
   updatedAt: string;
+  deletedAt: string | null;
 }
 
 export interface OngoingTimer {
@@ -129,6 +133,7 @@ export interface UpdateProjectInput {
 export interface CreateTimeEntryInput {
   startTime: string;
   endTime: string;
+  breakMinutes?: number;
   description?: string;
   projectId: string;
 }
@@ -136,6 +141,7 @@ export interface CreateTimeEntryInput {
 export interface UpdateTimeEntryInput {
   startTime?: string;
   endTime?: string;
+  breakMinutes?: number;
   description?: string;
   projectId?: string;
 }
@@ -146,15 +152,22 @@ export interface BalanceCorrection {
   hours: number;
   description: string | null;
   createdAt: string;
+  deletedAt: string | null;
 }
 
-export interface WeekBalance {
-  weekStart: string; // YYYY-MM-DD (Monday)
-  weekEnd: string;   // YYYY-MM-DD (Sunday)
+export interface PeriodBalance {
+  periodStart: string;        // YYYY-MM-DD
+  periodEnd: string;          // YYYY-MM-DD
+  targetHours: number;        // pro-rated for first period
   trackedSeconds: number;
-  targetSeconds: number;
   correctionHours: number;
   balanceSeconds: number;
+  isOngoing: boolean;
+  // only present when isOngoing = true
+  dailyRateHours?: number;
+  workingDaysInPeriod?: number;
+  elapsedWorkingDays?: number;
+  expectedHours?: number;
 }
 
 export interface ClientTargetWithBalance {
@@ -162,26 +175,34 @@ export interface ClientTargetWithBalance {
   clientId: string;
   clientName: string;
   userId: string;
-  weeklyHours: number;
-  startDate: string; // YYYY-MM-DD
+  periodType: "weekly" | "monthly";
+  targetHours: number;
+  workingDays: string[];      // e.g. ["MON","WED"]
+  startDate: string;          // YYYY-MM-DD
   createdAt: string;
   updatedAt: string;
   corrections: BalanceCorrection[];
   totalBalanceSeconds: number;
-  currentWeekTrackedSeconds: number;
-  currentWeekTargetSeconds: number;
-  weeks: WeekBalance[];
+  currentPeriodTrackedSeconds: number;
+  currentPeriodTargetSeconds: number;
+  periods: PeriodBalance[];
+  /** True when an active timer for a project belonging to this client is running. */
+  hasOngoingTimer: boolean;
 }
 
 export interface CreateClientTargetInput {
   clientId: string;
-  weeklyHours: number;
-  startDate: string; // YYYY-MM-DD
+  targetHours: number;
+  periodType: "weekly" | "monthly";
+  workingDays: string[];      // e.g. ["MON","WED","FRI"]
+  startDate: string;          // YYYY-MM-DD
 }
 
 export interface UpdateClientTargetInput {
-  weeklyHours?: number;
-  startDate?: string;
+  targetHours?: number;
+  periodType?: "weekly" | "monthly";
+  workingDays?: string[];
+  startDate?: string;         // YYYY-MM-DD
 }
 
 export interface CreateCorrectionInput {
@@ -189,3 +210,19 @@ export interface CreateCorrectionInput {
   hours: number;
   description?: string;
 }
+
+export interface ApiKey {
+  id: string;
+  name: string;
+  prefix: string;
+  createdAt: string;
+  lastUsedAt: string | null;
+}
+
+export interface CreatedApiKey extends ApiKey {
+  rawKey: string; // returned only on creation
+}
+
+export interface CreateApiKeyInput {
+  name: string;
+}

frontend/src/utils/dateUtils.ts

@@ -43,7 +43,14 @@ export function formatDurationHoursMinutes(totalSeconds: number): string {
   return `${hours}h ${minutes}m`;
 }
 
-export function calculateDuration(startTime: string, endTime: string): number {
+export function calculateDuration(startTime: string, endTime: string, breakMinutes: number = 0): number {
+  const start = parseISO(startTime);
+  const end = parseISO(endTime);
+  const totalSeconds = differenceInSeconds(end, start);
+  return totalSeconds - (breakMinutes * 60);
+}
+
+export function calculateGrossDuration(startTime: string, endTime: string): number {
   const start = parseISO(startTime);
   const end = parseISO(endTime);
   return differenceInSeconds(end, start);
@@ -52,16 +59,18 @@ export function calculateDuration(startTime: string, endTime: string): number {
 export function formatDurationFromDates(
   startTime: string,
   endTime: string,
+  breakMinutes: number = 0,
 ): string {
-  const seconds = calculateDuration(startTime, endTime);
+  const seconds = calculateDuration(startTime, endTime, breakMinutes);
   return formatDuration(seconds);
 }
 
 export function formatDurationFromDatesHoursMinutes(
   startTime: string,
   endTime: string,
+  breakMinutes: number = 0,
 ): string {
-  const seconds = calculateDuration(startTime, endTime);
+  const seconds = calculateDuration(startTime, endTime, breakMinutes);
   return formatDurationHoursMinutes(seconds);
 }
 

ios/TimeTracker/TimeTracker/Core/Network/APIEndpoints.swift

@@ -25,6 +25,14 @@ enum APIEndpoint {
     static let timer = "/timer"
     static let timerStart = "/timer/start"
     static let timerStop = "/timer/stop"
+
+    // Client Targets
+    static let clientTargets = "/client-targets"
+    static func clientTarget(id: String) -> String { "/client-targets/\(id)" }
+    static func clientTargetCorrections(targetId: String) -> String { "/client-targets/\(targetId)/corrections" }
+    static func clientTargetCorrection(targetId: String, correctionId: String) -> String {
+        "/client-targets/\(targetId)/corrections/\(correctionId)"
+    }
 }
 
 struct APIEndpoints {

ios/TimeTracker/TimeTracker/Features/Clients/ClientsView.swift

@@ -1,123 +1,3 @@
-import SwiftUI
-
-struct ClientsView: View {
-    @StateObject private var viewModel = ClientsViewModel()
-    @State private var showAddClient = false
-    
-    var body: some View {
-        NavigationStack {
-            Group {
-                if viewModel.isLoading && viewModel.clients.isEmpty {
-                    LoadingView()
-                } else if let error = viewModel.error, viewModel.clients.isEmpty {
-                    ErrorView(message: error) {
-                        Task { await viewModel.loadClients() }
-                    }
-                } else if viewModel.clients.isEmpty {
-                    EmptyView(
-                        icon: "person.2",
-                        title: "No Clients",
-                        message: "Create a client to organize your projects."
-                    )
-                } else {
-                    clientsList
-                }
-            }
-            .navigationTitle("Clients")
-            .toolbar {
-                ToolbarItem(placement: .primaryAction) {
-                    Button {
-                        showAddClient = true
-                    } label: {
-                        Image(systemName: "plus")
-                    }
-                }
-            }
-            .task {
-                await viewModel.loadClients()
-            }
-            .sheet(isPresented: $showAddClient) {
-                ClientFormView(onSave: { name, description in
-                    Task {
-                        await viewModel.createClient(name: name, description: description)
-                    }
-                })
-            }
-        }
-    }
-    
-    private var clientsList: some View {
-        List {
-            ForEach(viewModel.clients) { client in
-                ClientRow(client: client)
-            }
-            .onDelete { indexSet in
-                Task {
-                    for index in indexSet {
-                        await viewModel.deleteClient(viewModel.clients[index])
-                    }
-                }
-            }
-        }
-        .refreshable {
-            await viewModel.loadClients()
-        }
-    }
-}
-
-struct ClientRow: View {
-    let client: Client
-    
-    var body: some View {
-        VStack(alignment: .leading, spacing: 4) {
-            Text(client.name)
-                .font(.headline)
-            if let description = client.description {
-                Text(description)
-                    .font(.subheadline)
-                    .foregroundStyle(.secondary)
-                    .lineLimit(2)
-            }
-        }
-    }
-}
-
-struct ClientFormView: View {
-    @Environment(\.dismiss) private var dismiss
-    
-    let onSave: (String, String?) -> Void
-    
-    @State private var name = ""
-    @State private var description = ""
-    
-    var body: some View {
-        NavigationStack {
-            Form {
-                Section("Name") {
-                    TextField("Client name", text: $name)
-                }
-                
-                Section("Description (Optional)") {
-                    TextField("Description", text: $description, axis: .vertical)
-                        .lineLimit(3...6)
-                }
-            }
-            .navigationTitle("New Client")
-            .navigationBarTitleDisplayMode(.inline)
-            .toolbar {
-                ToolbarItem(placement: .cancellationAction) {
-                    Button("Cancel") {
-                        dismiss()
-                    }
-                }
-                ToolbarItem(placement: .confirmationAction) {
-                    Button("Save") {
-                        onSave(name, description.isEmpty ? nil : description)
-                        dismiss()
-                    }
-                    .disabled(name.isEmpty)
-                }
-            }
-        }
-    }
-}
+// ClientsView.swift — replaced by Features/Settings/ClientsListView.swift
+// This file is intentionally empty; ClientsViewModel is no longer used directly.
+import Foundation

ios/TimeTracker/TimeTracker/Features/Dashboard/DashboardView.swift

@@ -2,94 +2,82 @@ import SwiftUI
 
 struct DashboardView: View {
     @StateObject private var viewModel = DashboardViewModel()
-    
+
     var body: some View {
         NavigationStack {
-            ScrollView {
-                VStack(spacing: 24) {
-                    // Active Timer Card
-                    timerCard
-                    
-                    // Weekly Stats
-                    if let stats = viewModel.statistics {
-                        statsSection(stats)
-                    }
-                    
-                    // Recent Entries
-                    recentEntriesSection
+            Group {
+                if viewModel.isLoading && viewModel.statistics == nil && viewModel.recentEntries.isEmpty {
+                    LoadingView()
+                } else {
+                    scrollContent
                 }
-                .padding()
             }
             .navigationTitle("Dashboard")
-            .refreshable {
-                await viewModel.loadData()
-            }
-            .task {
-                await viewModel.loadData()
-            }
+            .refreshable { await viewModel.loadData() }
+            .task { await viewModel.loadData() }
         }
     }
-    
+
+    // MARK: - Main scroll content
+
+    private var scrollContent: some View {
+        ScrollView {
+            VStack(spacing: 24) {
+                timerCard
+                if let stats = viewModel.statistics { weeklyStatsSection(stats) }
+                if !viewModel.clientTargets.isEmpty { workBalanceSection }
+                recentEntriesSection
+            }
+            .padding()
+        }
+    }
+
+    // MARK: - Active Timer Card
+
     private var timerCard: some View {
-        VStack(spacing: 16) {
-            if let timer = viewModel.activeTimer {
-                HStack {
-                    VStack(alignment: .leading, spacing: 4) {
-                        Text("Timer Running")
-                            .font(.subheadline)
-                            .foregroundStyle(.secondary)
-                        
-                        Text(viewModel.elapsedTime.formattedDuration)
-                            .font(.system(size: 32, weight: .medium, design: .monospaced))
-                        
-                        if let project = timer.project {
-                            ProjectColorBadge(color: project.color, name: project.name)
-                        }
-                    }
-                    
-                    Spacer()
-                    
-                    Image(systemName: "timer")
-                        .font(.title)
-                        .foregroundStyle(.green)
-                }
-            } else {
-                HStack {
-                    VStack(alignment: .leading, spacing: 4) {
-                        Text("No Active Timer")
-                            .font(.subheadline)
-                            .foregroundStyle(.secondary)
-                        
-                        Text("Start tracking to see your time")
-                            .font(.headline)
-                    }
-                    
-                    Spacer()
-                    
-                    Image(systemName: "timer")
-                        .font(.title)
+        HStack {
+            VStack(alignment: .leading, spacing: 4) {
+                if let timer = viewModel.activeTimer {
+                    Text("Timer Running")
+                        .font(.subheadline)
                         .foregroundStyle(.secondary)
+                    Text(viewModel.elapsedTime.formattedDuration)
+                        .font(.system(size: 32, weight: .medium, design: .monospaced))
+                    if let project = timer.project {
+                        ProjectColorBadge(color: project.color, name: project.name)
+                    }
+                } else {
+                    Text("No Active Timer")
+                        .font(.subheadline)
+                        .foregroundStyle(.secondary)
+                    Text("Start tracking to see your time")
+                        .font(.headline)
                 }
             }
+            Spacer()
+            Image(systemName: "timer")
+                .font(.title)
+                .foregroundStyle(viewModel.activeTimer != nil ? .green : .secondary)
         }
         .padding()
         .background(Color(.systemGray6))
         .cornerRadius(12)
     }
-    
-    private func statsSection(_ stats: TimeStatistics) -> some View {
+
+    // MARK: - Weekly Stats
+
+    private func weeklyStatsSection(_ stats: TimeStatistics) -> some View {
         VStack(alignment: .leading, spacing: 12) {
             Text("This Week")
                 .font(.headline)
-            
+
             HStack(spacing: 12) {
                 StatCard(
                     title: "Hours Tracked",
-                    value: TimeInterval(stats.totalSeconds).formattedHours,
+                    value: TimeInterval(stats.totalSeconds).formattedShortDuration,
                     icon: "clock.fill",
                     color: .blue
                 )
-                
                 StatCard(
                     title: "Entries",
                     value: "\(stats.entryCount)",
@@ -97,13 +85,12 @@ struct DashboardView: View {
                     color: .green
                 )
             }
-            
+
             if !stats.byProject.isEmpty {
                 VStack(alignment: .leading, spacing: 8) {
                     Text("By Project")
                         .font(.subheadline)
                         .foregroundStyle(.secondary)
-                    
                     ForEach(stats.byProject.prefix(5)) { projectStat in
                         HStack {
                             if let color = projectStat.projectColor {
@@ -112,21 +99,39 @@ struct DashboardView: View {
                             Text(projectStat.projectName)
                                 .font(.subheadline)
                             Spacer()
-                            Text(TimeInterval(projectStat.totalSeconds).formattedHours)
+                            Text(TimeInterval(projectStat.totalSeconds).formattedShortDuration)
                                 .font(.subheadline)
                                 .foregroundStyle(.secondary)
                         }
                     }
                 }
+                .padding()
+                .background(Color(.systemGray6))
+                .cornerRadius(12)
             }
         }
     }
-    
+
+    // MARK: - Work Balance Section
+
+    private var workBalanceSection: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            Text("Work Time Balance")
+                .font(.headline)
+
+            ForEach(viewModel.clientTargets) { target in
+                WorkBalanceCard(target: target)
+            }
+        }
+    }
+
+    // MARK: - Recent Entries
+
     private var recentEntriesSection: some View {
         VStack(alignment: .leading, spacing: 12) {
             Text("Recent Entries")
                 .font(.headline)
-            
+
             if viewModel.recentEntries.isEmpty {
                 Text("No entries yet")
                     .font(.subheadline)
@@ -134,22 +139,27 @@ struct DashboardView: View {
                     .frame(maxWidth: .infinity, alignment: .center)
                     .padding()
             } else {
-                ForEach(viewModel.recentEntries) { entry in
-                    HStack {
-                        ProjectColorDot(color: entry.project.color, size: 10)
-                        VStack(alignment: .leading, spacing: 2) {
-                            Text(entry.project.name)
+                VStack(spacing: 0) {
+                    ForEach(Array(viewModel.recentEntries.enumerated()), id: \.element.id) { index, entry in
+                        HStack {
+                            ProjectColorDot(color: entry.project.color, size: 10)
+                            VStack(alignment: .leading, spacing: 2) {
+                                Text(entry.project.name)
+                                    .font(.subheadline)
+                                Text(formatDate(entry.startTime))
+                                    .font(.caption)
+                                    .foregroundStyle(.secondary)
+                            }
+                            Spacer()
+                            Text(entry.duration.formattedShortDuration)
                                 .font(.subheadline)
-                            Text(formatDate(entry.startTime))
-                                .font(.caption)
                                 .foregroundStyle(.secondary)
                         }
-                        Spacer()
-                        Text(entry.duration.formattedHours)
-                            .font(.subheadline)
-                            .foregroundStyle(.secondary)
+                        .padding(.vertical, 8)
+                        if index < viewModel.recentEntries.count - 1 {
+                            Divider()
+                        }
                     }
-                    .padding(.vertical, 4)
                 }
             }
         }
@@ -157,9 +167,144 @@ struct DashboardView: View {
         .background(Color(.systemGray6))
         .cornerRadius(12)
     }
-    
+
     private func formatDate(_ isoString: String) -> String {
         guard let date = Date.fromISO8601(isoString) else { return "" }
         return date.formattedDateTime()
     }
 }
+
+// MARK: - Work Balance Card
+
+struct WorkBalanceCard: View {
+    let target: ClientTarget
+    @State private var expanded = false
+
+    private var totalBalance: TimeInterval { TimeInterval(target.totalBalanceSeconds) }
+    private var currentWeekTracked: TimeInterval { TimeInterval(target.currentWeekTrackedSeconds) }
+    private var currentWeekTarget: TimeInterval { TimeInterval(target.currentWeekTargetSeconds) }
+
+    private var balanceColor: Color {
+        if target.totalBalanceSeconds >= 0 { return .green }
+        return .red
+    }
+
+    private var balanceLabel: String {
+        let abs = abs(totalBalance)
+        return target.totalBalanceSeconds >= 0
+            ? "+\(abs.formattedShortDuration) overtime"
+            : "-\(abs.formattedShortDuration) undertime"
+    }
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            // Header row
+            HStack {
+                Text(target.clientName)
+                    .font(.subheadline)
+                    .fontWeight(.semibold)
+                Spacer()
+                Text(balanceLabel)
+                    .font(.subheadline)
+                    .fontWeight(.medium)
+                    .foregroundStyle(balanceColor)
+            }
+
+            // This-week progress
+            VStack(alignment: .leading, spacing: 4) {
+                HStack {
+                    Text("This week")
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                    Spacer()
+                    Text("\(currentWeekTracked.formattedShortDuration) / \(currentWeekTarget.formattedShortDuration)")
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                }
+                if currentWeekTarget > 0 {
+                    ProgressView(value: min(currentWeekTracked / currentWeekTarget, 1.0))
+                        .tint(currentWeekTracked >= currentWeekTarget ? .green : .blue)
+                }
+            }
+
+            // Weekly breakdown (expandable)
+            if !target.weeks.isEmpty {
+                Button {
+                    withAnimation(.easeInOut(duration: 0.2)) { expanded.toggle() }
+                } label: {
+                    HStack(spacing: 4) {
+                        Text(expanded ? "Hide weeks" : "Show weeks")
+                            .font(.caption)
+                        Image(systemName: expanded ? "chevron.up" : "chevron.down")
+                            .font(.caption2)
+                    }
+                    .foregroundStyle(.secondary)
+                }
+                .buttonStyle(.plain)
+
+                if expanded {
+                    VStack(spacing: 6) {
+                        ForEach(target.weeks.suffix(8).reversed()) { week in
+                            WeekBalanceRow(week: week)
+                        }
+                    }
+                    .transition(.opacity.combined(with: .move(edge: .top)))
+                }
+            }
+        }
+        .padding()
+        .background(Color(.systemGray6))
+        .cornerRadius(12)
+    }
+}
+
+// MARK: - Week Balance Row
+
+struct WeekBalanceRow: View {
+    let week: WeekBalance
+
+    private var balance: TimeInterval { TimeInterval(week.balanceSeconds) }
+    private var tracked: TimeInterval { TimeInterval(week.trackedSeconds) }
+    private var target: TimeInterval { TimeInterval(week.targetSeconds) }
+    private var balanceColor: Color { week.balanceSeconds >= 0 ? .green : .red }
+
+    var body: some View {
+        HStack {
+            Text(weekLabel)
+                .font(.caption)
+                .foregroundStyle(.secondary)
+            Spacer()
+            Text(tracked.formattedShortDuration)
+                .font(.caption)
+            Text("/")
+                .font(.caption)
+                .foregroundStyle(.secondary)
+            Text(target.formattedShortDuration)
+                .font(.caption)
+                .foregroundStyle(.secondary)
+            Text(balanceText)
+                .font(.caption)
+                .fontWeight(.medium)
+                .foregroundStyle(balanceColor)
+                .frame(width: 70, alignment: .trailing)
+        }
+    }
+
+    private var weekLabel: String {
+        guard let date = parseDate(week.weekStart) else { return week.weekStart }
+        let formatter = DateFormatter()
+        formatter.dateFormat = "MMM d"
+        return formatter.string(from: date)
+    }
+
+    private var balanceText: String {
+        let abs = Swift.abs(balance)
+        return week.balanceSeconds >= 0 ? "+\(abs.formattedShortDuration)" : "-\(abs.formattedShortDuration)"
+    }
+
+    private func parseDate(_ string: String) -> Date? {
+        let f = DateFormatter()
+        f.dateFormat = "yyyy-MM-dd"
+        return f.date(from: string)
+    }
+}

ios/TimeTracker/TimeTracker/Features/Dashboard/DashboardViewModel.swift

@@ -6,40 +6,42 @@ final class DashboardViewModel: ObservableObject {
     @Published var activeTimer: OngoingTimer?
     @Published var statistics: TimeStatistics?
     @Published var recentEntries: [TimeEntry] = []
+    @Published var clientTargets: [ClientTarget] = []
     @Published var isLoading = false
     @Published var error: String?
     @Published var elapsedTime: TimeInterval = 0
-    
+
     private let apiClient = APIClient()
     private let database = DatabaseService.shared
     private var timerTask: Task<Void, Never>?
-    
+
     init() {
         startElapsedTimeUpdater()
     }
-    
+
     deinit {
         timerTask?.cancel()
     }
-    
+
     func loadData() async {
         isLoading = true
         error = nil
-        
+
         do {
             // Fetch active timer
             activeTimer = try await apiClient.request(
                 endpoint: APIEndpoint.timer,
                 authenticated: true
             )
-            
-            // Get statistics for this week
+
+            // Statistics for this week
             let calendar = Calendar.current
             let today = Date()
-            let startOfWeek = calendar.date(from: calendar.dateComponents([.yearForWeekOfYear, .weekOfYear], from: today))!
+            let startOfWeek = calendar.date(
+                from: calendar.dateComponents([.yearForWeekOfYear, .weekOfYear], from: today)
+            )!
             let endOfWeek = calendar.date(byAdding: .day, value: 6, to: startOfWeek)!
-            
-            let statsInput = StatisticsFiltersInput(startDate: startOfWeek, endDate: endOfWeek)
+
             statistics = try await apiClient.request(
                 endpoint: APIEndpoint.timeEntriesStatistics,
                 queryItems: [
@@ -48,41 +50,43 @@ final class DashboardViewModel: ObservableObject {
                 ],
                 authenticated: true
             )
-            
-            // Fetch recent entries
+
+            // Recent entries (last 5)
             let entriesResponse: TimeEntryListResponse = try await apiClient.request(
                 endpoint: APIEndpoint.timeEntries,
-                queryItems: [
-                    URLQueryItem(name: "limit", value: "5")
-                ],
+                queryItems: [URLQueryItem(name: "limit", value: "5")],
                 authenticated: true
             )
             recentEntries = entriesResponse.entries
-            
+
+            // Client targets (for overtime/undertime)
+            clientTargets = try await apiClient.request(
+                endpoint: APIEndpoint.clientTargets,
+                authenticated: true
+            )
+
             if let timer = activeTimer {
                 elapsedTime = timer.elapsedTime
             }
-            
+
             isLoading = false
         } catch {
             isLoading = false
             self.error = error.localizedDescription
-            
-            // Try to load cached data
+
+            // Fallback to cached timer
             if let cachedTimer = try? await database.getCachedTimer() {
                 activeTimer = cachedTimer
                 elapsedTime = cachedTimer.elapsedTime
             }
         }
     }
-    
+
     private func startElapsedTimeUpdater() {
         timerTask = Task { [weak self] in
             while !Task.isCancelled {
                 try? await Task.sleep(nanoseconds: 1_000_000_000)
-                
                 guard let self = self, self.activeTimer != nil else { continue }
-                
                 await MainActor.run {
                     self.elapsedTime = self.activeTimer?.elapsedTime ?? 0
                 }

ios/TimeTracker/TimeTracker/Features/Projects/ProjectsView.swift

@@ -1,167 +1,3 @@
-import SwiftUI
-
-struct ProjectsView: View {
-    @StateObject private var viewModel = ProjectsViewModel()
-    @State private var showAddProject = false
-    
-    var body: some View {
-        NavigationStack {
-            Group {
-                if viewModel.isLoading && viewModel.projects.isEmpty {
-                    LoadingView()
-                } else if let error = viewModel.error, viewModel.projects.isEmpty {
-                    ErrorView(message: error) {
-                        Task { await viewModel.loadData() }
-                    }
-                } else if viewModel.projects.isEmpty {
-                    EmptyView(
-                        icon: "folder",
-                        title: "No Projects",
-                        message: "Create a project to start tracking time."
-                    )
-                } else {
-                    projectsList
-                }
-            }
-            .navigationTitle("Projects")
-            .toolbar {
-                ToolbarItem(placement: .primaryAction) {
-                    Button {
-                        showAddProject = true
-                    } label: {
-                        Image(systemName: "plus")
-                    }
-                }
-            }
-            .task {
-                await viewModel.loadData()
-            }
-            .sheet(isPresented: $showAddProject) {
-                ProjectFormView(
-                    clients: viewModel.clients,
-                    onSave: { name, description, color, clientId in
-                        Task {
-                            await viewModel.createProject(
-                                name: name,
-                                description: description,
-                                color: color,
-                                clientId: clientId
-                            )
-                        }
-                    }
-                )
-            }
-        }
-    }
-    
-    private var projectsList: some View {
-        List {
-            ForEach(viewModel.projects) { project in
-                ProjectRow(project: project)
-            }
-            .onDelete { indexSet in
-                Task {
-                    for index in indexSet {
-                        await viewModel.deleteProject(viewModel.projects[index])
-                    }
-                }
-            }
-        }
-        .refreshable {
-            await viewModel.loadData()
-        }
-    }
-}
-
-struct ProjectRow: View {
-    let project: Project
-    
-    var body: some View {
-        HStack {
-            ProjectColorDot(color: project.color, size: 16)
-            
-            VStack(alignment: .leading, spacing: 2) {
-                Text(project.name)
-                    .font(.headline)
-                Text(project.client.name)
-                    .font(.subheadline)
-                    .foregroundStyle(.secondary)
-            }
-        }
-    }
-}
-
-struct ProjectFormView: View {
-    @Environment(\.dismiss) private var dismiss
-    
-    let clients: [Client]
-    let onSave: (String, String?, String?, String) -> Void
-    
-    @State private var name = ""
-    @State private var description = ""
-    @State private var selectedColor: String = "#3B82F6"
-    @State private var selectedClient: Client?
-    
-    private let colors = ["#EF4444", "#F97316", "#EAB308", "#22C55E", "#14B8A6", 
-                          "#06B6D4", "#3B82F6", "#6366F1", "#A855F7", "#EC4899"]
-    
-    var body: some View {
-        NavigationStack {
-            Form {
-                Section("Name") {
-                    TextField("Project name", text: $name)
-                }
-                
-                Section("Description (Optional)") {
-                    TextField("Description", text: $description, axis: .vertical)
-                        .lineLimit(3...6)
-                }
-                
-                Section("Color") {
-                    LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: 5), spacing: 16) {
-                        ForEach(colors, id: \.self) { color in
-                            Circle()
-                                .fill(Color(hex: color))
-                                .frame(width: 44, height: 44)
-                                .overlay(
-                                    Circle()
-                                        .strokeBorder(Color.primary, lineWidth: selectedColor == color ? 3 : 0)
-                                )
-                                .onTapGesture {
-                                    selectedColor = color
-                                }
-                        }
-                    }
-                    .padding(.vertical, 8)
-                }
-                
-                Section("Client") {
-                    Picker("Client", selection: $selectedClient) {
-                        Text("Select Client").tag(nil as Client?)
-                        ForEach(clients) { client in
-                            Text(client.name)
-                                .tag(client as Client?)
-                        }
-                    }
-                }
-            }
-            .navigationTitle("New Project")
-            .navigationBarTitleDisplayMode(.inline)
-            .toolbar {
-                ToolbarItem(placement: .cancellationAction) {
-                    Button("Cancel") {
-                        dismiss()
-                    }
-                }
-                ToolbarItem(placement: .confirmationAction) {
-                    Button("Save") {
-                        guard let client = selectedClient else { return }
-                        onSave(name, description.isEmpty ? nil : description, selectedColor, client.id)
-                        dismiss()
-                    }
-                    .disabled(name.isEmpty || selectedClient == nil)
-                }
-            }
-        }
-    }
-}
+// ProjectsView.swift — replaced by Features/Settings/ProjectsListView.swift
+// This file is intentionally empty; ProjectsViewModel is no longer used directly.
+import Foundation

ios/TimeTracker/TimeTracker/Features/Settings/ClientsListView.swift

@@ -0,0 +1,608 @@
+import SwiftUI
+
+// MARK: - Clients List
+
+struct ClientsListView: View {
+    @State private var clients: [Client] = []
+    @State private var isLoading = false
+    @State private var error: String?
+    @State private var showAddClient = false
+    @State private var clientToDelete: Client?
+    @State private var showDeleteConfirmation = false
+
+    private let apiClient = APIClient()
+
+    var body: some View {
+        Group {
+            if isLoading && clients.isEmpty {
+                LoadingView()
+            } else if let err = error, clients.isEmpty {
+                ErrorView(message: err) { Task { await loadClients() } }
+            } else if clients.isEmpty {
+                EmptyView(icon: "person.2", title: "No Clients",
+                          message: "Create a client to organise your projects.")
+            } else {
+                List {
+                    ForEach(clients) { client in
+                        NavigationLink {
+                            ClientDetailView(client: client, onUpdate: { Task { await loadClients() } })
+                        } label: {
+                            ClientRow(client: client)
+                        }
+                    }
+                    .onDelete { indexSet in
+                        if let i = indexSet.first {
+                            clientToDelete = clients[i]
+                            showDeleteConfirmation = true
+                        }
+                    }
+                }
+                .refreshable { await loadClients() }
+            }
+        }
+        .navigationTitle("Clients")
+        .navigationBarTitleDisplayMode(.large)
+        .toolbar {
+            ToolbarItem(placement: .primaryAction) {
+                Button { showAddClient = true } label: { Image(systemName: "plus") }
+            }
+        }
+        .task { await loadClients() }
+        .sheet(isPresented: $showAddClient) {
+            ClientFormSheet(mode: .create) { Task { await loadClients() } }
+        }
+        .alert("Delete Client?", isPresented: $showDeleteConfirmation, presenting: clientToDelete) { client in
+            Button("Cancel", role: .cancel) {}
+            Button("Delete", role: .destructive) { Task { await deleteClient(client) } }
+        } message: { client in
+            Text("Deleting '\(client.name)' will also delete all its projects and time entries. This cannot be undone.")
+        }
+    }
+
+    private func loadClients() async {
+        isLoading = true; error = nil
+        do {
+            clients = try await apiClient.request(endpoint: APIEndpoint.clients, authenticated: true)
+        } catch { self.error = error.localizedDescription }
+        isLoading = false
+    }
+
+    private func deleteClient(_ client: Client) async {
+        do {
+            try await apiClient.requestVoid(endpoint: APIEndpoint.client(id: client.id),
+                                            method: .delete, authenticated: true)
+            clients.removeAll { $0.id == client.id }
+        } catch { self.error = error.localizedDescription }
+    }
+}
+
+struct ClientRow: View {
+    let client: Client
+    var body: some View {
+        VStack(alignment: .leading, spacing: 3) {
+            Text(client.name).font(.headline)
+            if let desc = client.description {
+                Text(desc).font(.subheadline).foregroundStyle(.secondary).lineLimit(2)
+            }
+        }
+        .padding(.vertical, 2)
+    }
+}
+
+// MARK: - Client Detail / Edit + Target Management
+
+struct ClientDetailView: View {
+    let client: Client
+    let onUpdate: () -> Void
+
+    // Edit client fields
+    @State private var name: String
+    @State private var clientDescription: String
+    @State private var isSavingClient = false
+    @State private var clientSaveError: String?
+    @State private var clientSaveSuccess = false
+
+    // Client targets
+    @State private var target: ClientTarget?
+    @State private var isLoadingTarget = false
+    @State private var targetError: String?
+
+    // New target form
+    @State private var showNewTargetForm = false
+    @State private var newWeeklyHours = 40.0
+    @State private var newStartDate = Date().nextMonday()
+    @State private var isSavingTarget = false
+
+    // Edit target inline
+    @State private var editingWeeklyHours: Double?
+    @State private var editingStartDate: Date?
+    @State private var isEditingTarget = false
+
+    // Balance correction
+    @State private var showAddCorrection = false
+    @State private var correctionDate = Date()
+    @State private var correctionHours = 0.0
+    @State private var correctionDescription = ""
+    @State private var isSavingCorrection = false
+    @State private var correctionToDelete: BalanceCorrection?
+    @State private var showDeleteCorrection = false
+
+    private let apiClient = APIClient()
+
+    init(client: Client, onUpdate: @escaping () -> Void) {
+        self.client = client
+        self.onUpdate = onUpdate
+        _name = State(initialValue: client.name)
+        _clientDescription = State(initialValue: client.description ?? "")
+    }
+
+    var body: some View {
+        Form {
+            clientEditSection
+            targetSection
+            if let target { correctionsSection(target) }
+        }
+        .navigationTitle(client.name)
+        .navigationBarTitleDisplayMode(.inline)
+        .task { await loadTarget() }
+        .sheet(isPresented: $showAddCorrection) {
+            addCorrectionSheet
+        }
+    }
+
+    // MARK: - Client edit
+
+    private var clientEditSection: some View {
+        Section("Client Details") {
+            TextField("Name", text: $name)
+            TextField("Description (optional)", text: $clientDescription, axis: .vertical)
+                .lineLimit(2...4)
+
+            if let err = clientSaveError {
+                Text(err).font(.caption).foregroundStyle(.red)
+            }
+            if clientSaveSuccess {
+                Label("Saved", systemImage: "checkmark.circle").foregroundStyle(.green).font(.caption)
+            }
+
+            Button(isSavingClient ? "Saving…" : "Save Client Details") {
+                Task { await saveClient() }
+            }
+            .disabled(name.isEmpty || isSavingClient)
+        }
+    }
+
+    private func saveClient() async {
+        isSavingClient = true; clientSaveError = nil; clientSaveSuccess = false
+        do {
+            let input = UpdateClientInput(
+                name: name,
+                description: clientDescription.isEmpty ? nil : clientDescription
+            )
+            let _: Client = try await apiClient.request(
+                endpoint: APIEndpoint.client(id: client.id),
+                method: .put,
+                body: input,
+                authenticated: true
+            )
+            clientSaveSuccess = true
+            onUpdate()
+        } catch { clientSaveError = error.localizedDescription }
+        isSavingClient = false
+    }
+
+    // MARK: - Target section
+
+    private var targetSection: some View {
+        Section {
+            if isLoadingTarget {
+                HStack { Spacer(); ProgressView(); Spacer() }
+            } else if let err = targetError {
+                Text(err).font(.caption).foregroundStyle(.red)
+            } else if let target {
+                // Show existing target + balance
+                targetSummaryRows(target)
+                if isEditingTarget {
+                    targetEditRows(target)
+                } else {
+                    Button("Edit Target") { startEditingTarget(target) }
+                }
+            } else {
+                // No target yet
+                if showNewTargetForm {
+                    newTargetFormRows
+                } else {
+                    Button("Set Up Work Time Target") { showNewTargetForm = true }
+                }
+            }
+        } header: {
+            Text("Work Time Target")
+        }
+    }
+
+    private func targetSummaryRows(_ t: ClientTarget) -> some View {
+        Group {
+            HStack {
+                Text("Weekly hours")
+                Spacer()
+                Text("\(t.weeklyHours, specifier: "%.1f") h/week")
+                    .foregroundStyle(.secondary)
+            }
+            HStack {
+                Text("Tracking since")
+                Spacer()
+                Text(formatDate(t.startDate))
+                    .foregroundStyle(.secondary)
+            }
+            HStack {
+                Text("This week")
+                Spacer()
+                Text("\(TimeInterval(t.currentWeekTrackedSeconds).formattedShortDuration) / \(TimeInterval(t.currentWeekTargetSeconds).formattedShortDuration)")
+                    .foregroundStyle(.secondary)
+            }
+            HStack {
+                Text("Total balance")
+                Spacer()
+                let balance = TimeInterval(abs(t.totalBalanceSeconds))
+                Text(t.totalBalanceSeconds >= 0 ? "+\(balance.formattedShortDuration)" : "-\(balance.formattedShortDuration)")
+                    .fontWeight(.medium)
+                    .foregroundStyle(t.totalBalanceSeconds >= 0 ? .green : .red)
+            }
+        }
+    }
+
+    private func targetEditRows(_ t: ClientTarget) -> some View {
+        Group {
+            HStack {
+                Text("Weekly hours")
+                Spacer()
+                TextField("Hours", value: Binding(
+                    get: { editingWeeklyHours ?? t.weeklyHours },
+                    set: { editingWeeklyHours = $0 }
+                ), format: .number)
+                .keyboardType(.decimalPad)
+                .multilineTextAlignment(.trailing)
+                .frame(width: 80)
+            }
+
+            DatePicker("Start date (Monday)",
+                       selection: Binding(
+                           get: { editingStartDate ?? parseDate(t.startDate) ?? Date() },
+                           set: { editingStartDate = $0 }
+                       ),
+                       displayedComponents: .date)
+
+            HStack {
+                Button("Cancel") { isEditingTarget = false; editingWeeklyHours = nil; editingStartDate = nil }
+                    .foregroundStyle(.secondary)
+                Spacer()
+                Button(isSavingTarget ? "Saving…" : "Save Target") {
+                    Task { await saveTarget(existingId: t.id) }
+                }
+                .disabled(isSavingTarget)
+            }
+        }
+    }
+
+    private var newTargetFormRows: some View {
+        Group {
+            HStack {
+                Text("Weekly hours")
+                Spacer()
+                TextField("Hours", value: $newWeeklyHours, format: .number)
+                    .keyboardType(.decimalPad)
+                    .multilineTextAlignment(.trailing)
+                    .frame(width: 80)
+            }
+            DatePicker("Start date (Monday)", selection: $newStartDate, displayedComponents: .date)
+
+            HStack {
+                Button("Cancel") { showNewTargetForm = false }
+                    .foregroundStyle(.secondary)
+                Spacer()
+                Button(isSavingTarget ? "Saving…" : "Create Target") {
+                    Task { await createTarget() }
+                }
+                .disabled(newWeeklyHours <= 0 || isSavingTarget)
+            }
+        }
+    }
+
+    private func startEditingTarget(_ t: ClientTarget) {
+        editingWeeklyHours = t.weeklyHours
+        editingStartDate = parseDate(t.startDate)
+        isEditingTarget = true
+    }
+
+    // MARK: - Corrections section
+
+    private func correctionsSection(_ t: ClientTarget) -> some View {
+        Section {
+            if t.corrections.isEmpty {
+                Text("No corrections")
+                    .foregroundStyle(.secondary)
+                    .font(.subheadline)
+            } else {
+                ForEach(t.corrections) { correction in
+                    HStack {
+                        VStack(alignment: .leading, spacing: 2) {
+                            Text(formatDate(correction.date))
+                                .font(.subheadline)
+                            if let desc = correction.description {
+                                Text(desc).font(.caption).foregroundStyle(.secondary)
+                            }
+                        }
+                        Spacer()
+                        Text(correction.hours >= 0 ? "+\(correction.hours, specifier: "%.1f")h" : "\(correction.hours, specifier: "%.1f")h")
+                            .font(.subheadline)
+                            .fontWeight(.medium)
+                            .foregroundStyle(correction.hours >= 0 ? .green : .red)
+                    }
+                }
+                .onDelete { indexSet in
+                    if let i = indexSet.first {
+                        correctionToDelete = t.corrections[i]
+                        showDeleteCorrection = true
+                    }
+                }
+            }
+
+            Button("Add Correction") { showAddCorrection = true }
+        } header: {
+            Text("Balance Corrections")
+        }
+        .alert("Delete Correction?", isPresented: $showDeleteCorrection, presenting: correctionToDelete) { correction in
+            Button("Cancel", role: .cancel) {}
+            Button("Delete", role: .destructive) {
+                Task { await deleteCorrection(correction) }
+            }
+        } message: { correction in
+            Text("Remove the \(correction.hours >= 0 ? "+" : "")\(correction.hours, specifier: "%.1f")h correction on \(formatDate(correction.date))?")
+        }
+    }
+
+    // MARK: - Add correction sheet
+
+    private var addCorrectionSheet: some View {
+        NavigationStack {
+            Form {
+                Section("Date") {
+                    DatePicker("Date", selection: $correctionDate, displayedComponents: .date)
+                }
+                Section("Hours adjustment") {
+                    HStack {
+                        TextField("Hours (positive = bonus, negative = penalty)",
+                                  value: $correctionHours, format: .number)
+                            .keyboardType(.numbersAndPunctuation)
+                        Text("h").foregroundStyle(.secondary)
+                    }
+                    Text("Positive values reduce the weekly target; negative values increase it.")
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                }
+                Section("Description (optional)") {
+                    TextField("Note", text: $correctionDescription)
+                }
+            }
+            .navigationTitle("Add Correction")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Cancel") { showAddCorrection = false }
+                }
+                ToolbarItem(placement: .confirmationAction) {
+                    Button(isSavingCorrection ? "Saving…" : "Add") {
+                        Task { await addCorrection() }
+                    }
+                    .disabled(correctionHours == 0 || isSavingCorrection)
+                }
+            }
+        }
+    }
+
+    // MARK: - API calls
+
+    private func loadTarget() async {
+        isLoadingTarget = true; targetError = nil
+        do {
+            let allTargets: [ClientTarget] = try await apiClient.request(
+                endpoint: APIEndpoint.clientTargets, authenticated: true
+            )
+            target = allTargets.first { $0.clientId == client.id }
+        } catch { targetError = error.localizedDescription }
+        isLoadingTarget = false
+    }
+
+    private func createTarget() async {
+        isSavingTarget = true
+        do {
+            let input = CreateClientTargetInput(
+                clientId: client.id,
+                weeklyHours: newWeeklyHours,
+                startDate: newStartDate.iso8601FullDate
+            )
+            let created: ClientTarget = try await apiClient.request(
+                endpoint: APIEndpoint.clientTargets,
+                method: .post,
+                body: input,
+                authenticated: true
+            )
+            target = created
+            showNewTargetForm = false
+        } catch { targetError = error.localizedDescription }
+        isSavingTarget = false
+    }
+
+    private func saveTarget(existingId: String) async {
+        isSavingTarget = true
+        do {
+            let input = UpdateClientTargetInput(
+                weeklyHours: editingWeeklyHours,
+                startDate: editingStartDate?.iso8601FullDate
+            )
+            let _: ClientTarget = try await apiClient.request(
+                endpoint: APIEndpoint.clientTarget(id: existingId),
+                method: .put,
+                body: input,
+                authenticated: true
+            )
+            isEditingTarget = false
+            editingWeeklyHours = nil
+            editingStartDate = nil
+            await loadTarget()        // reload to get fresh balance
+        } catch { targetError = error.localizedDescription }
+        isSavingTarget = false
+    }
+
+    private func addCorrection() async {
+        guard let t = target else { return }
+        isSavingCorrection = true
+        do {
+            let input = CreateBalanceCorrectionInput(
+                date: correctionDate.iso8601FullDate,
+                hours: correctionHours,
+                description: correctionDescription.isEmpty ? nil : correctionDescription
+            )
+            try await apiClient.requestVoid(
+                endpoint: APIEndpoint.clientTargetCorrections(targetId: t.id),
+                method: .post,
+                body: input,
+                authenticated: true
+            )
+            correctionHours = 0
+            correctionDescription = ""
+            showAddCorrection = false
+            await loadTarget()
+        } catch { targetError = error.localizedDescription }
+        isSavingCorrection = false
+    }
+
+    private func deleteCorrection(_ correction: BalanceCorrection) async {
+        guard let t = target else { return }
+        do {
+            try await apiClient.requestVoid(
+                endpoint: APIEndpoint.clientTargetCorrection(targetId: t.id, correctionId: correction.id),
+                method: .delete,
+                authenticated: true
+            )
+            await loadTarget()
+        } catch { targetError = error.localizedDescription }
+    }
+
+    // MARK: - Helpers
+
+    private func formatDate(_ string: String) -> String {
+        let f = DateFormatter()
+        f.dateFormat = "yyyy-MM-dd"
+        guard let d = f.date(from: string) else { return string }
+        let out = DateFormatter()
+        out.dateStyle = .medium
+        return out.string(from: d)
+    }
+
+    private func parseDate(_ string: String) -> Date? {
+        let f = DateFormatter()
+        f.dateFormat = "yyyy-MM-dd"
+        return f.date(from: string)
+    }
+}
+
+// MARK: - Client Form Sheet (create / edit)
+
+struct ClientFormSheet: View {
+    enum Mode {
+        case create
+        case edit(Client)
+    }
+
+    @Environment(\.dismiss) private var dismiss
+
+    let mode: Mode
+    let onSave: () -> Void
+
+    @State private var name = ""
+    @State private var description = ""
+    @State private var isSaving = false
+    @State private var error: String?
+
+    private let apiClient = APIClient()
+
+    init(mode: Mode, onSave: @escaping () -> Void) {
+        self.mode = mode
+        self.onSave = onSave
+        if case .edit(let client) = mode {
+            _name = State(initialValue: client.name)
+            _description = State(initialValue: client.description ?? "")
+        }
+    }
+
+    var body: some View {
+        NavigationStack {
+            Form {
+                Section("Name") {
+                    TextField("Client name", text: $name)
+                }
+                Section("Description (optional)") {
+                    TextField("Description", text: $description, axis: .vertical)
+                        .lineLimit(3...6)
+                }
+                if let error {
+                    Section { Text(error).font(.caption).foregroundStyle(.red) }
+                }
+            }
+            .navigationTitle(isEditing ? "Edit Client" : "New Client")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Cancel") { dismiss() }
+                }
+                ToolbarItem(placement: .confirmationAction) {
+                    Button(isSaving ? "Saving…" : "Save") {
+                        Task { await save() }
+                    }
+                    .disabled(name.isEmpty || isSaving)
+                }
+            }
+        }
+    }
+
+    private var isEditing: Bool {
+        if case .edit = mode { return true }
+        return false
+    }
+
+    private func save() async {
+        isSaving = true; error = nil
+        do {
+            switch mode {
+            case .create:
+                let input = CreateClientInput(name: name, description: description.isEmpty ? nil : description)
+                let _: Client = try await apiClient.request(
+                    endpoint: APIEndpoint.clients, method: .post, body: input, authenticated: true
+                )
+            case .edit(let client):
+                let input = UpdateClientInput(name: name, description: description.isEmpty ? nil : description)
+                let _: Client = try await apiClient.request(
+                    endpoint: APIEndpoint.client(id: client.id), method: .put, body: input, authenticated: true
+                )
+            }
+            isSaving = false
+            dismiss()
+            onSave()
+        } catch {
+            isSaving = false
+            self.error = error.localizedDescription
+        }
+    }
+}
+
+// MARK: - Date extension
+
+private extension Date {
+    func nextMonday() -> Date {
+        let cal = Calendar.current
+        var comps = DateComponents()
+        comps.weekday = 2 // Monday
+        return cal.nextDate(after: self, matching: comps, matchingPolicy: .nextTime) ?? self
+    }
+}

ios/TimeTracker/TimeTracker/Features/Settings/ProjectsListView.swift

@@ -0,0 +1,335 @@
+import SwiftUI
+
+// MARK: - Projects List (under Settings)
+
+struct ProjectsListView: View {
+    @State private var projects: [Project] = []
+    @State private var clients: [Client] = []
+    @State private var isLoading = false
+    @State private var error: String?
+    @State private var showAddProject = false
+    @State private var projectToDelete: Project?
+    @State private var showDeleteConfirmation = false
+
+    private let apiClient = APIClient()
+
+    var body: some View {
+        Group {
+            if isLoading && projects.isEmpty {
+                LoadingView()
+            } else if let err = error, projects.isEmpty {
+                ErrorView(message: err) { Task { await loadData() } }
+            } else if projects.isEmpty {
+                EmptyView(icon: "folder", title: "No Projects",
+                          message: "Create a project to start tracking time.")
+            } else {
+                projectList
+            }
+        }
+        .navigationTitle("Projects")
+        .navigationBarTitleDisplayMode(.large)
+        .toolbar {
+            ToolbarItem(placement: .primaryAction) {
+                Button { showAddProject = true } label: { Image(systemName: "plus") }
+            }
+        }
+        .task { await loadData() }
+        .sheet(isPresented: $showAddProject) {
+            ProjectFormSheet(mode: .create, clients: clients) {
+                Task { await loadData() }
+            }
+        }
+        .alert("Delete Project?", isPresented: $showDeleteConfirmation, presenting: projectToDelete) { project in
+            Button("Cancel", role: .cancel) {}
+            Button("Delete", role: .destructive) { Task { await deleteProject(project) } }
+        } message: { project in
+            Text("Deleting '\(project.name)' will also delete all its time entries. This cannot be undone.")
+        }
+    }
+
+    // Group projects by client
+    private var projectsByClient: [(clientName: String, projects: [Project])] {
+        let grouped = Dictionary(grouping: projects) { $0.client.name }
+        return grouped.sorted { $0.key < $1.key }
+                      .map { (clientName: $0.key, projects: $0.value.sorted { $0.name < $1.name }) }
+    }
+
+    private var projectList: some View {
+        List {
+            ForEach(projectsByClient, id: \.clientName) { group in
+                Section(group.clientName) {
+                    ForEach(group.projects) { project in
+                        NavigationLink {
+                            ProjectDetailView(project: project, clients: clients) {
+                                Task { await loadData() }
+                            }
+                        } label: {
+                            ProjectListRow(project: project)
+                        }
+                    }
+                    .onDelete { indexSet in
+                        let deleteTargets = indexSet.map { group.projects[$0] }
+                        if let first = deleteTargets.first {
+                            projectToDelete = first
+                            showDeleteConfirmation = true
+                        }
+                    }
+                }
+            }
+        }
+        .refreshable { await loadData() }
+    }
+
+    private func loadData() async {
+        isLoading = true; error = nil
+        do {
+            async let fetchProjects: [Project] = apiClient.request(endpoint: APIEndpoint.projects, authenticated: true)
+            async let fetchClients: [Client] = apiClient.request(endpoint: APIEndpoint.clients, authenticated: true)
+            projects = try await fetchProjects
+            clients = try await fetchClients
+        } catch { self.error = error.localizedDescription }
+        isLoading = false
+    }
+
+    private func deleteProject(_ project: Project) async {
+        do {
+            try await apiClient.requestVoid(endpoint: APIEndpoint.project(id: project.id),
+                                            method: .delete, authenticated: true)
+            projects.removeAll { $0.id == project.id }
+        } catch { self.error = error.localizedDescription }
+    }
+}
+
+// MARK: - Project list row
+
+struct ProjectListRow: View {
+    let project: Project
+    var body: some View {
+        HStack(spacing: 12) {
+            ProjectColorDot(color: project.color, size: 14)
+            VStack(alignment: .leading, spacing: 2) {
+                Text(project.name).font(.headline)
+                if let desc = project.description {
+                    Text(desc).font(.caption).foregroundStyle(.secondary).lineLimit(1)
+                }
+            }
+        }
+        .padding(.vertical, 2)
+    }
+}
+
+// MARK: - Project Detail / Edit
+
+struct ProjectDetailView: View {
+    let project: Project
+    let clients: [Client]
+    let onUpdate: () -> Void
+
+    @State private var name: String
+    @State private var projectDescription: String
+    @State private var selectedColor: String
+    @State private var selectedClient: Client?
+    @State private var isSaving = false
+    @State private var saveError: String?
+    @State private var saveSuccess = false
+
+    private let colorPalette = ["#EF4444", "#F97316", "#EAB308", "#22C55E", "#14B8A6",
+                                "#06B6D4", "#3B82F6", "#6366F1", "#A855F7", "#EC4899"]
+    private let apiClient = APIClient()
+
+    init(project: Project, clients: [Client], onUpdate: @escaping () -> Void) {
+        self.project = project
+        self.clients = clients
+        self.onUpdate = onUpdate
+        _name = State(initialValue: project.name)
+        _projectDescription = State(initialValue: project.description ?? "")
+        _selectedColor = State(initialValue: project.color ?? "#3B82F6")
+        _selectedClient = State(initialValue: clients.first { $0.id == project.clientId })
+    }
+
+    var body: some View {
+        Form {
+            Section("Name") {
+                TextField("Project name", text: $name)
+            }
+
+            Section("Description (optional)") {
+                TextField("Description", text: $projectDescription, axis: .vertical)
+                    .lineLimit(2...5)
+            }
+
+            Section("Colour") {
+                LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: 5), spacing: 16) {
+                    ForEach(colorPalette, id: \.self) { color in
+                        Circle()
+                            .fill(Color(hex: color))
+                            .frame(width: 44, height: 44)
+                            .overlay(
+                                Circle().strokeBorder(
+                                    Color.primary,
+                                    lineWidth: selectedColor == color ? 3 : 0
+                                )
+                            )
+                            .onTapGesture { selectedColor = color }
+                    }
+                }
+                .padding(.vertical, 8)
+            }
+
+            Section("Client") {
+                Picker("Client", selection: $selectedClient) {
+                    Text("Select Client").tag(nil as Client?)
+                    ForEach(clients) { client in
+                        Text(client.name).tag(client as Client?)
+                    }
+                }
+                .pickerStyle(.navigationLink)
+            }
+
+            if let err = saveError {
+                Section { Text(err).font(.caption).foregroundStyle(.red) }
+            }
+            if saveSuccess {
+                Section { Label("Saved", systemImage: "checkmark.circle").foregroundStyle(.green) }
+            }
+
+            Section {
+                Button(isSaving ? "Saving…" : "Save Project") {
+                    Task { await save() }
+                }
+                .disabled(name.isEmpty || selectedClient == nil || isSaving)
+            }
+        }
+        .navigationTitle(project.name)
+        .navigationBarTitleDisplayMode(.inline)
+        .onAppear {
+            // Ensure selectedClient resolves correctly once clients are available
+            if selectedClient == nil {
+                selectedClient = clients.first { $0.id == project.clientId }
+            }
+        }
+    }
+
+    private func save() async {
+        guard let client = selectedClient else { return }
+        isSaving = true; saveError = nil; saveSuccess = false
+        do {
+            let input = UpdateProjectInput(
+                name: name,
+                description: projectDescription.isEmpty ? nil : projectDescription,
+                color: selectedColor,
+                clientId: client.id
+            )
+            let _: Project = try await apiClient.request(
+                endpoint: APIEndpoint.project(id: project.id),
+                method: .put,
+                body: input,
+                authenticated: true
+            )
+            saveSuccess = true
+            onUpdate()
+        } catch { saveError = error.localizedDescription }
+        isSaving = false
+    }
+}
+
+// MARK: - Project Form Sheet (create)
+
+struct ProjectFormSheet: View {
+    enum Mode { case create }
+
+    @Environment(\.dismiss) private var dismiss
+
+    let mode: Mode
+    let clients: [Client]
+    let onSave: () -> Void
+
+    @State private var name = ""
+    @State private var description = ""
+    @State private var selectedColor = "#3B82F6"
+    @State private var selectedClient: Client?
+    @State private var isSaving = false
+    @State private var error: String?
+
+    private let colorPalette = ["#EF4444", "#F97316", "#EAB308", "#22C55E", "#14B8A6",
+                                "#06B6D4", "#3B82F6", "#6366F1", "#A855F7", "#EC4899"]
+    private let apiClient = APIClient()
+
+    var body: some View {
+        NavigationStack {
+            Form {
+                Section("Name") {
+                    TextField("Project name", text: $name)
+                }
+                Section("Description (optional)") {
+                    TextField("Description", text: $description, axis: .vertical)
+                        .lineLimit(2...5)
+                }
+                Section("Colour") {
+                    LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: 5), spacing: 16) {
+                        ForEach(colorPalette, id: \.self) { color in
+                            Circle()
+                                .fill(Color(hex: color))
+                                .frame(width: 44, height: 44)
+                                .overlay(
+                                    Circle().strokeBorder(
+                                        Color.primary,
+                                        lineWidth: selectedColor == color ? 3 : 0
+                                    )
+                                )
+                                .onTapGesture { selectedColor = color }
+                        }
+                    }
+                    .padding(.vertical, 8)
+                }
+                Section("Client") {
+                    Picker("Client", selection: $selectedClient) {
+                        Text("Select Client").tag(nil as Client?)
+                        ForEach(clients) { client in
+                            Text(client.name).tag(client as Client?)
+                        }
+                    }
+                    .pickerStyle(.navigationLink)
+                }
+                if let error {
+                    Section { Text(error).font(.caption).foregroundStyle(.red) }
+                }
+            }
+            .navigationTitle("New Project")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Cancel") { dismiss() }
+                }
+                ToolbarItem(placement: .confirmationAction) {
+                    Button(isSaving ? "Saving…" : "Save") {
+                        Task { await save() }
+                    }
+                    .disabled(name.isEmpty || selectedClient == nil || isSaving)
+                }
+            }
+        }
+    }
+
+    private func save() async {
+        guard let client = selectedClient else { return }
+        isSaving = true; error = nil
+        do {
+            let input = CreateProjectInput(
+                name: name,
+                description: description.isEmpty ? nil : description,
+                color: selectedColor,
+                clientId: client.id
+            )
+            let _: Project = try await apiClient.request(
+                endpoint: APIEndpoint.projects, method: .post, body: input, authenticated: true
+            )
+            isSaving = false
+            dismiss()
+            onSave()
+        } catch {
+            isSaving = false
+            self.error = error.localizedDescription
+        }
+    }
+}

ios/TimeTracker/TimeTracker/Features/Settings/SettingsView.swift

@@ -0,0 +1,74 @@
+import SwiftUI
+
+struct SettingsView: View {
+    @EnvironmentObject var authManager: AuthManager
+    @State private var showLogoutConfirmation = false
+
+    var body: some View {
+        NavigationStack {
+            List {
+                // User info header
+                if let user = authManager.currentUser {
+                    Section {
+                        HStack(spacing: 14) {
+                            Circle()
+                                .fill(Color.accentColor.opacity(0.15))
+                                .frame(width: 50, height: 50)
+                                .overlay(
+                                    Text(user.username.prefix(1).uppercased())
+                                        .font(.title3)
+                                        .fontWeight(.semibold)
+                                        .foregroundStyle(Color.accentColor)
+                                )
+                            VStack(alignment: .leading, spacing: 2) {
+                                Text(user.fullName ?? user.username)
+                                    .font(.headline)
+                                Text(user.email)
+                                    .font(.subheadline)
+                                    .foregroundStyle(.secondary)
+                            }
+                        }
+                        .padding(.vertical, 6)
+                    }
+                }
+
+                // Navigation
+                Section("Data") {
+                    NavigationLink {
+                        ClientsListView()
+                    } label: {
+                        Label("Clients", systemImage: "person.2")
+                    }
+
+                    NavigationLink {
+                        ProjectsListView()
+                    } label: {
+                        Label("Projects", systemImage: "folder")
+                    }
+                }
+
+                // Logout
+                Section {
+                    Button(role: .destructive) {
+                        showLogoutConfirmation = true
+                    } label: {
+                        HStack {
+                            Spacer()
+                            Label("Sign Out", systemImage: "rectangle.portrait.and.arrow.right")
+                            Spacer()
+                        }
+                    }
+                }
+            }
+            .navigationTitle("Settings")
+            .alert("Sign Out?", isPresented: $showLogoutConfirmation) {
+                Button("Cancel", role: .cancel) {}
+                Button("Sign Out", role: .destructive) {
+                    Task { try? await authManager.logout() }
+                }
+            } message: {
+                Text("You will be signed out and need to sign in again to use the app.")
+            }
+        }
+    }
+}

ios/TimeTracker/TimeTracker/Features/TimeEntries/TimeEntriesView.swift

@@ -2,8 +2,19 @@ import SwiftUI
 
 struct TimeEntriesView: View {
     @StateObject private var viewModel = TimeEntriesViewModel()
+
+    // dayOffset is the source of truth: 0 = today, -1 = yesterday, etc.
+    @State private var dayOffset: Int = 0
+    // tabSelection is always snapped back to 1 (middle) after each swipe.
+    // Pages are: 0 = dayOffset-1, 1 = dayOffset, 2 = dayOffset+1
+    @State private var tabSelection: Int = 1
+
+    @State private var showFilterSheet = false
     @State private var showAddEntry = false
-    
+    @State private var entryToEdit: TimeEntry?
+    @State private var entryToDelete: TimeEntry?
+    @State private var showDeleteConfirmation = false
+
     var body: some View {
         NavigationStack {
             Group {
@@ -13,100 +24,338 @@ struct TimeEntriesView: View {
                     ErrorView(message: error) {
                         Task { await viewModel.loadEntries() }
                     }
-                } else if viewModel.entries.isEmpty {
-                    EmptyView(
-                        icon: "clock",
-                        title: "No Time Entries",
-                        message: "Start tracking your time to see entries here."
-                    )
                 } else {
-                    entriesList
+                    mainContent
                 }
             }
-            .navigationTitle("Time Entries")
-            .toolbar {
-                ToolbarItem(placement: .primaryAction) {
-                    Button {
-                        showAddEntry = true
-                    } label: {
-                        Image(systemName: "plus")
-                    }
+            .navigationTitle("Entries")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar { toolbarContent }
+            .task { await viewModel.loadEntries() }
+            .refreshable { await viewModel.loadEntries() }
+            .sheet(isPresented: $showFilterSheet) {
+                TimeEntriesFilterSheet(viewModel: viewModel) {
+                    Task { await viewModel.loadEntries() }
                 }
             }
-            .task {
-                await viewModel.loadEntries()
-            }
             .sheet(isPresented: $showAddEntry) {
-                TimeEntryFormView(onSave: {
+                TimeEntryDetailSheet(entry: nil) {
                     Task { await viewModel.loadEntries() }
-                })
+                }
+            }
+            .sheet(item: $entryToEdit) { entry in
+                TimeEntryDetailSheet(entry: entry) {
+                    Task { await viewModel.loadEntries() }
+                }
+            }
+            .alert("Delete Entry?", isPresented: $showDeleteConfirmation, presenting: entryToDelete) { entry in
+                Button("Cancel", role: .cancel) {}
+                Button("Delete", role: .destructive) {
+                    Task { await viewModel.deleteEntry(entry) }
+                }
+            } message: { entry in
+                Text("Delete the time entry for '\(entry.project.name)'? This cannot be undone.")
             }
         }
     }
-    
-    private var entriesList: some View {
-        List {
-            ForEach(viewModel.entries) { entry in
-                TimeEntryRow(entry: entry)
+
+    // MARK: - Toolbar
+
+    @ToolbarContentBuilder
+    private var toolbarContent: some ToolbarContent {
+        ToolbarItem(placement: .primaryAction) {
+            Button { showAddEntry = true } label: { Image(systemName: "plus") }
+        }
+        ToolbarItem(placement: .topBarLeading) {
+            Button {
+                Task { await viewModel.loadFilterSupportData() }
+                showFilterSheet = true
+            } label: {
+                Image(systemName: viewModel.activeFilters.isEmpty ? "line.3.horizontal.decrease.circle" : "line.3.horizontal.decrease.circle.fill")
             }
-            .onDelete { indexSet in
-                Task {
-                    for index in indexSet {
-                        await viewModel.deleteEntry(viewModel.entries[index])
+        }
+        
+        // Place the DatePicker in the principal placement (center of nav bar)
+        ToolbarItem(placement: .principal) {
+            DatePicker(
+                "",
+                selection: Binding(
+                    get: {
+                        Calendar.current.date(byAdding: .day, value: dayOffset, to: Calendar.current.startOfDay(for: Date())) ?? Date()
+                    },
+                    set: { newDate in
+                        let today = Calendar.current.startOfDay(for: Date())
+                        let normalizedNewDate = Calendar.current.startOfDay(for: newDate)
+                        let components = Calendar.current.dateComponents([.day], from: today, to: normalizedNewDate)
+                        if let dayDifference = components.day {
+                            dayOffset = dayDifference
+                        }
+                    }
+                ),
+                displayedComponents: .date
+            )
+            .datePickerStyle(.compact)
+            .labelsHidden()
+            .environment(\.locale, Locale.current) // Ensure correct start of week
+        }
+    }
+
+    // MARK: - Main content
+
+    private var mainContent: some View {
+        // Only 3 pages exist at any time: previous, current, next.
+        // After each swipe settles, we reset tabSelection to 1 and shift
+        // dayOffset, so the carousel appears infinite while staying cheap.
+        TabView(selection: $tabSelection) {
+            ForEach(0..<3, id: \.self) { page in
+                let offset = dayOffset + (page - 1)
+                let day = Calendar.current.date(
+                    byAdding: .day,
+                    value: offset,
+                    to: Calendar.current.startOfDay(for: Date())
+                ) ?? Date()
+
+                ScrollView {
+                    dayEntriesSection(for: day)
+                }
+                .tag(page)
+            }
+        }
+        .tabViewStyle(.page(indexDisplayMode: .never))
+        .onChange(of: tabSelection) { _, newPage in
+            guard newPage != 1 else { return }
+            // Shift the logical day offset by how many pages we moved.
+            dayOffset += newPage - 1
+            // Snap back to the middle page without animation so the
+            // surrounding pages are refreshed invisibly.
+            var tx = Transaction()
+            tx.disablesAnimations = true
+            withTransaction(tx) {
+                tabSelection = 1
+            }
+        }
+    }
+
+    // MARK: - Day entries section
+
+    private func dayEntriesSection(for day: Date) -> some View {
+        let dayEntries = viewModel.entries(for: day)
+        return VStack(alignment: .leading, spacing: 0) {
+            
+            // Optional: A small summary header for the day
+            HStack {
+                Text(dayTitle(day))
+                    .font(.subheadline)
+                    .fontWeight(.semibold)
+                    .foregroundStyle(.primary)
+                Spacer()
+                Text(dayEntries.isEmpty ? "No entries" : "\(dayEntries.count) \(dayEntries.count == 1 ? "entry" : "entries")")
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+            }
+            .padding(.horizontal)
+            .padding(.vertical, 12)
+
+            if dayEntries.isEmpty {
+                Text("No entries for this day")
+                    .font(.subheadline)
+                    .foregroundStyle(.secondary)
+                    .frame(maxWidth: .infinity, alignment: .center)
+                    .padding(.vertical, 32)
+            } else {
+                ForEach(Array(dayEntries.enumerated()), id: \.element.id) { index, entry in
+                    EntryRow(entry: entry)
+                        .contentShape(Rectangle())
+                        .onTapGesture { entryToEdit = entry }
+                        .swipeActions(edge: .trailing, allowsFullSwipe: false) {
+                            Button(role: .destructive) {
+                                entryToDelete = entry
+                                showDeleteConfirmation = true
+                            } label: {
+                                Label("Delete", systemImage: "trash")
+                            }
+                        }
+                    if index < dayEntries.count - 1 {
+                        Divider().padding(.leading, 56)
                     }
                 }
             }
         }
-        .refreshable {
-            await viewModel.loadEntries()
-        }
+        .padding(.bottom, 40) // Give some breathing room at the bottom of the scroll
+    }
+
+    // MARK: - Helpers
+
+    private func dayTitle(_ date: Date) -> String {
+        let cal = Calendar.current
+        if cal.isDateInToday(date) { return "Today" }
+        if cal.isDateInYesterday(date) { return "Yesterday" }
+        if cal.isDateInTomorrow(date) { return "Tomorrow" }
+        let formatter = DateFormatter()
+        formatter.dateFormat = "EEEE, MMM d"
+        return formatter.string(from: date)
     }
 }
 
-struct TimeEntryRow: View {
+// MARK: - Entry Row
+
+struct EntryRow: View {
     let entry: TimeEntry
-    
+
     var body: some View {
-        VStack(alignment: .leading, spacing: 8) {
-            HStack {
-                ProjectColorDot(color: entry.project.color)
+        HStack(alignment: .top, spacing: 12) {
+            // Color dot
+            ProjectColorDot(color: entry.project.color, size: 12)
+                .padding(.top, 4)
+
+            VStack(alignment: .leading, spacing: 3) {
                 Text(entry.project.name)
-                    .font(.headline)
-                Spacer()
-                Text(entry.duration.formattedHours)
                     .font(.subheadline)
-                    .foregroundStyle(.secondary)
-            }
-            
-            HStack {
-                Text(formatDateRange(start: entry.startTime, end: entry.endTime))
-                    .font(.subheadline)
-                    .foregroundStyle(.secondary)
-                Spacer()
-                Text(entry.project.client.name)
-                    .font(.caption)
-                    .foregroundStyle(.secondary)
-            }
-            
-            if let description = entry.description {
-                Text(description)
-                    .font(.caption)
-                    .foregroundStyle(.secondary)
-                    .lineLimit(2)
+                    .fontWeight(.medium)
+
+                HStack(spacing: 6) {
+                    Text(timeRange)
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                    Text("·")
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                    Text(entry.project.client.name)
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                }
+
+                if let desc = entry.description, !desc.isEmpty {
+                    Text(desc)
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                        .lineLimit(2)
+                }
             }
+
+            Spacer()
+
+            Text(entry.duration.formattedShortDuration)
+                .font(.subheadline)
+                .foregroundStyle(.secondary)
         }
-        .padding(.vertical, 4)
+        .padding(.horizontal)
+        .padding(.vertical, 10)
     }
-    
-    private func formatDateRange(start: String, end: String) -> String {
-        let formatter = DateFormatter()
-        formatter.dateFormat = "MMM d, HH:mm"
-        
-        guard let startDate = Date.fromISO8601(start),
-              let endDate = Date.fromISO8601(end) else {
-            return ""
-        }
-        
-        return "\(formatter.string(from: startDate)) - \(formatter.string(from: endDate))"
+
+    private var timeRange: String {
+        let fmt = DateFormatter()
+        fmt.dateFormat = "HH:mm"
+        let start = Date.fromISO8601(entry.startTime).map { fmt.string(from: $0) } ?? ""
+        let end = Date.fromISO8601(entry.endTime).map { fmt.string(from: $0) } ?? ""
+        return "\(start) – \(end)"
+    }
+}
+
+
+// MARK: - Filter Sheet
+
+struct TimeEntriesFilterSheet: View {
+    @Environment(\.dismiss) private var dismiss
+    @ObservedObject var viewModel: TimeEntriesViewModel
+    let onApply: () -> Void
+
+    @State private var startDate: Date = Calendar.current.date(byAdding: .month, value: -1, to: Date()) ?? Date()
+    @State private var endDate: Date = Date()
+    @State private var useStartDate = false
+    @State private var useEndDate = false
+    @State private var selectedProjectId: String?
+    @State private var selectedProjectName: String?
+    @State private var selectedClientId: String?
+    @State private var selectedClientName: String?
+
+    var body: some View {
+        NavigationStack {
+            Form {
+                Section("Date Range") {
+                    Toggle("From", isOn: $useStartDate)
+                    if useStartDate {
+                        DatePicker("", selection: $startDate, displayedComponents: .date)
+                            .labelsHidden()
+                    }
+                    Toggle("To", isOn: $useEndDate)
+                    if useEndDate {
+                        DatePicker("", selection: $endDate, displayedComponents: .date)
+                            .labelsHidden()
+                    }
+                }
+
+                Section("Project") {
+                    Picker("Project", selection: $selectedProjectId) {
+                        Text("Any Project").tag(nil as String?)
+                        ForEach(viewModel.projects) { project in
+                            HStack {
+                                ProjectColorDot(color: project.color, size: 10)
+                                Text(project.name)
+                            }
+                            .tag(project.id as String?)
+                        }
+                    }
+                    .pickerStyle(.navigationLink)
+                    .onChange(of: selectedProjectId) { _, newId in
+                        selectedProjectName = viewModel.projects.first { $0.id == newId }?.name
+                    }
+                }
+
+                Section("Client") {
+                    Picker("Client", selection: $selectedClientId) {
+                        Text("Any Client").tag(nil as String?)
+                        ForEach(viewModel.clients) { client in
+                            Text(client.name).tag(client.id as String?)
+                        }
+                    }
+                    .pickerStyle(.navigationLink)
+                    .onChange(of: selectedClientId) { _, newId in
+                        selectedClientName = viewModel.clients.first { $0.id == newId }?.name
+                    }
+                }
+
+                Section {
+                    Button("Clear All Filters", role: .destructive) {
+                        useStartDate = false
+                        useEndDate = false
+                        selectedProjectId = nil
+                        selectedClientId = nil
+                    }
+                }
+            }
+            .navigationTitle("Filter Entries")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Cancel") { dismiss() }
+                }
+                ToolbarItem(placement: .confirmationAction) {
+                    Button("Apply") { applyAndDismiss() }
+                }
+            }
+            .onAppear { loadCurrentFilters() }
+        }
+    }
+
+    private func loadCurrentFilters() {
+        let f = viewModel.activeFilters
+        if let s = f.startDate { startDate = s; useStartDate = true }
+        if let e = f.endDate { endDate = e; useEndDate = true }
+        selectedProjectId = f.projectId
+        selectedClientId = f.clientId
+    }
+
+    private func applyAndDismiss() {
+        viewModel.activeFilters = TimeEntryActiveFilters(
+            startDate: useStartDate ? startDate : nil,
+            endDate: useEndDate ? endDate : nil,
+            projectId: selectedProjectId,
+            projectName: selectedProjectName,
+            clientId: selectedClientId,
+            clientName: selectedClientName
+        )
+        dismiss()
+        onApply()
     }
 }

ios/TimeTracker/TimeTracker/Features/TimeEntries/TimeEntriesViewModel.swift

@@ -1,45 +1,54 @@
 import Foundation
 import SwiftUI
 
+// MARK: - Active Filters (UI state)
+
+struct TimeEntryActiveFilters: Equatable {
+    var startDate: Date?
+    var endDate: Date?
+    var projectId: String?
+    var projectName: String?
+    var clientId: String?
+    var clientName: String?
+
+    var isEmpty: Bool {
+        startDate == nil && endDate == nil && projectId == nil && clientId == nil
+    }
+}
+
+// MARK: - ViewModel
+
 @MainActor
 final class TimeEntriesViewModel: ObservableObject {
+    // All loaded entries (flat list, accumulated across pages)
     @Published var entries: [TimeEntry] = []
     @Published var pagination: Pagination?
     @Published var isLoading = false
+    @Published var isLoadingMore = false
     @Published var error: String?
-    @Published var filters = TimeEntryFilters()
-    
+
+    // Active filters driving the current fetch
+    @Published var activeFilters = TimeEntryActiveFilters()
+
+    // Projects and clients needed for filter sheet pickers
+    @Published var projects: [Project] = []
+    @Published var clients: [Client] = []
+
     private let apiClient = APIClient()
-    
-    func loadEntries() async {
+
+    // MARK: - Fetch
+
+    func loadEntries(resetPage: Bool = true) async {
+        if resetPage { entries = [] }
         isLoading = true
         error = nil
-        
+
         do {
-            var queryItems: [URLQueryItem] = []
-            
-            if let startDate = filters.startDate {
-                queryItems.append(URLQueryItem(name: "startDate", value: startDate))
-            }
-            if let endDate = filters.endDate {
-                queryItems.append(URLQueryItem(name: "endDate", value: endDate))
-            }
-            if let projectId = filters.projectId {
-                queryItems.append(URLQueryItem(name: "projectId", value: projectId))
-            }
-            if let page = filters.page {
-                queryItems.append(URLQueryItem(name: "page", value: String(page)))
-            }
-            if let limit = filters.limit {
-                queryItems.append(URLQueryItem(name: "limit", value: String(limit)))
-            }
-            
             let response: TimeEntryListResponse = try await apiClient.request(
                 endpoint: APIEndpoint.timeEntries,
-                queryItems: queryItems.isEmpty ? nil : queryItems,
+                queryItems: buildQueryItems(page: 1),
                 authenticated: true
             )
-            
             entries = response.entries
             pagination = response.pagination
             isLoading = false
@@ -48,23 +57,30 @@ final class TimeEntriesViewModel: ObservableObject {
             self.error = error.localizedDescription
         }
     }
-    
-    func nextPage() async {
-        guard let pagination = pagination,
+
+    func loadMoreIfNeeded(currentEntry entry: TimeEntry) async {
+        guard let pagination, !isLoadingMore,
               pagination.page < pagination.totalPages else { return }
-        
-        filters.page = pagination.page + 1
-        await loadEntries()
+        // Trigger when the last entry in the list becomes visible
+        guard entries.last?.id == entry.id else { return }
+
+        isLoadingMore = true
+        let nextPage = pagination.page + 1
+
+        do {
+            let response: TimeEntryListResponse = try await apiClient.request(
+                endpoint: APIEndpoint.timeEntries,
+                queryItems: buildQueryItems(page: nextPage),
+                authenticated: true
+            )
+            entries.append(contentsOf: response.entries)
+            self.pagination = response.pagination
+        } catch {
+            self.error = error.localizedDescription
+        }
+        isLoadingMore = false
     }
-    
-    func previousPage() async {
-        guard let pagination = pagination,
-              pagination.page > 1 else { return }
-        
-        filters.page = pagination.page - 1
-        await loadEntries()
-    }
-    
+
     func deleteEntry(_ entry: TimeEntry) async {
         do {
             try await apiClient.requestVoid(
@@ -72,10 +88,83 @@ final class TimeEntriesViewModel: ObservableObject {
                 method: .delete,
                 authenticated: true
             )
-            
             entries.removeAll { $0.id == entry.id }
         } catch {
             self.error = error.localizedDescription
         }
     }
+
+    // MARK: - Supporting data for filter sheet
+
+    func loadFilterSupportData() async {
+        async let fetchProjects: [Project] = apiClient.request(
+            endpoint: APIEndpoint.projects,
+            authenticated: true
+        )
+        async let fetchClients: [Client] = apiClient.request(
+            endpoint: APIEndpoint.clients,
+            authenticated: true
+        )
+        projects = (try? await fetchProjects) ?? []
+        clients = (try? await fetchClients) ?? []
+    }
+
+    // MARK: - Entries grouped by calendar day
+
+    var entriesByDay: [(date: Date, entries: [TimeEntry])] {
+        let calendar = Calendar.current
+        let grouped = Dictionary(grouping: entries) { entry -> Date in
+            guard let d = Date.fromISO8601(entry.startTime) else { return Date() }
+            return calendar.startOfDay(for: d)
+        }
+        return grouped
+            .sorted { $0.key > $1.key }
+            .map { (date: $0.key, entries: $0.value.sorted {
+                (Date.fromISO8601($0.startTime) ?? Date()) > (Date.fromISO8601($1.startTime) ?? Date())
+            }) }
+    }
+
+    /// All calendar days that have at least one entry (for dot decorations)
+    var daysWithEntries: Set<Date> {
+        let calendar = Calendar.current
+        return Set(entries.compactMap { entry in
+            guard let d = Date.fromISO8601(entry.startTime) else { return nil }
+            return calendar.startOfDay(for: d)
+        })
+    }
+
+    /// Entries for a specific calendar day
+    func entries(for day: Date) -> [TimeEntry] {
+        let calendar = Calendar.current
+        return entries.filter { entry in
+            guard let d = Date.fromISO8601(entry.startTime) else { return false }
+            return calendar.isDate(d, inSameDayAs: day)
+        }.sorted {
+            (Date.fromISO8601($0.startTime) ?? Date()) < (Date.fromISO8601($1.startTime) ?? Date())
+        }
+    }
+
+    // MARK: - Helpers
+
+    private func buildQueryItems(page: Int) -> [URLQueryItem] {
+        var items: [URLQueryItem] = [
+            URLQueryItem(name: "page", value: "\(page)"),
+            URLQueryItem(name: "limit", value: "100")
+        ]
+        if let start = activeFilters.startDate {
+            items.append(URLQueryItem(name: "startDate", value: start.iso8601String))
+        }
+        if let end = activeFilters.endDate {
+            // Push to end-of-day so the full day is included
+            let endOfDay = Calendar.current.date(bySettingHour: 23, minute: 59, second: 59, of: end) ?? end
+            items.append(URLQueryItem(name: "endDate", value: endOfDay.iso8601String))
+        }
+        if let pid = activeFilters.projectId {
+            items.append(URLQueryItem(name: "projectId", value: pid))
+        }
+        if let cid = activeFilters.clientId {
+            items.append(URLQueryItem(name: "clientId", value: cid))
+        }
+        return items
+    }
 }

ios/TimeTracker/TimeTracker/Features/TimeEntries/TimeEntryDetailSheet.swift

@@ -0,0 +1,212 @@
+import SwiftUI
+
+/// Detail/edit sheet for a single time entry.  Used both for creating new entries
+/// (pass `entry: nil`) and editing existing ones.
+struct TimeEntryDetailSheet: View {
+    @Environment(\.dismiss) private var dismiss
+
+    // Pass an existing entry to edit it; pass nil to create a new one.
+    let entry: TimeEntry?
+    let onSave: () -> Void
+
+    // Form state
+    @State private var startDateTime = Date()
+    @State private var endDateTime = Date()
+    @State private var description = ""
+    @State private var selectedProject: Project?
+
+    // Supporting data
+    @State private var projects: [Project] = []
+    @State private var isLoading = false
+    @State private var isSaving = false
+    @State private var error: String?
+
+    private let apiClient = APIClient()
+
+    init(entry: TimeEntry? = nil, onSave: @escaping () -> Void) {
+        self.entry = entry
+        self.onSave = onSave
+    }
+
+    // MARK: - Body
+
+    var body: some View {
+        NavigationStack {
+            Form {
+                projectSection
+                timeSection
+                descriptionSection
+                if let error { errorSection(error) }
+            }
+            .navigationTitle(entry == nil ? "New Entry" : "Edit Entry")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Cancel") { dismiss() }
+                }
+                ToolbarItem(placement: .confirmationAction) {
+                    if isSaving {
+                        ProgressView().controlSize(.small)
+                    } else {
+                        Button("Save") { Task { await save() } }
+                            .disabled(selectedProject == nil || endDateTime <= startDateTime)
+                    }
+                }
+            }
+            .task {
+                await loadProjects()
+                populateFromEntry()
+            }
+            .overlay { if isLoading { LoadingView() } }
+        }
+    }
+
+    // MARK: - Sections
+
+    private var projectSection: some View {
+        Section("Project") {
+            Picker("Project", selection: $selectedProject) {
+                Text("Select Project").tag(nil as Project?)
+                ForEach(projects) { project in
+                    HStack {
+                        ProjectColorDot(color: project.color, size: 10)
+                        Text(project.name)
+                        Text("· \(project.client.name)")
+                            .foregroundStyle(.secondary)
+                    }
+                    .tag(project as Project?)
+                }
+            }
+            .pickerStyle(.navigationLink)
+        }
+    }
+
+    private var timeSection: some View {
+        Section {
+            DatePicker("Start", selection: $startDateTime)
+            DatePicker("End", selection: $endDateTime, in: startDateTime...)
+            if endDateTime > startDateTime {
+                HStack {
+                    Text("Duration")
+                        .foregroundStyle(.secondary)
+                    Spacer()
+                    Text(endDateTime.timeIntervalSince(startDateTime).formattedShortDuration)
+                        .foregroundStyle(.secondary)
+                }
+            }
+        } header: {
+            Text("Time")
+        }
+    }
+
+    private var descriptionSection: some View {
+        Section("Description") {
+            TextField("Optional notes…", text: $description, axis: .vertical)
+                .lineLimit(3...8)
+        }
+    }
+
+    private func errorSection(_ message: String) -> some View {
+        Section {
+            Text(message)
+                .font(.caption)
+                .foregroundStyle(.red)
+        }
+    }
+
+    // MARK: - Data loading
+
+    private func loadProjects() async {
+        isLoading = true
+        do {
+            projects = try await apiClient.request(
+                endpoint: APIEndpoint.projects,
+                authenticated: true
+            )
+            // Re-apply project selection now that the list is populated
+            matchProjectAfterLoad()
+        } catch {
+            self.error = error.localizedDescription
+        }
+        isLoading = false
+    }
+
+    private func populateFromEntry() {
+        guard let entry else {
+            // Default: now rounded to minute, 1-hour window
+            let now = Date().roundedToMinute()
+            startDateTime = now
+            endDateTime = now.addingTimeInterval(3600)
+            return
+        }
+        startDateTime = Date.fromISO8601(entry.startTime) ?? Date()
+        endDateTime = Date.fromISO8601(entry.endTime) ?? Date()
+        description = entry.description ?? ""
+        // Pre-select the project once projects are loaded
+        if !projects.isEmpty {
+            selectedProject = projects.first { $0.id == entry.projectId }
+        }
+    }
+
+    // Called after projects load — re-apply the project selection if it wasn't
+    // set yet (projects may have loaded after populateFromEntry ran).
+    private func matchProjectAfterLoad() {
+        guard let entry, selectedProject == nil else { return }
+        selectedProject = projects.first { $0.id == entry.projectId }
+    }
+
+    // MARK: - Save
+
+    private func save() async {
+        guard let project = selectedProject else { return }
+        isSaving = true
+        error = nil
+
+        do {
+            if let existingEntry = entry {
+                let input = UpdateTimeEntryInput(
+                    startTime: startDateTime.iso8601String,
+                    endTime: endDateTime.iso8601String,
+                    description: description.isEmpty ? nil : description,
+                    projectId: project.id
+                )
+                try await apiClient.requestVoid(
+                    endpoint: APIEndpoint.timeEntry(id: existingEntry.id),
+                    method: .put,
+                    body: input,
+                    authenticated: true
+                )
+            } else {
+                let input = CreateTimeEntryInput(
+                    startTime: startDateTime,
+                    endTime: endDateTime,
+                    description: description.isEmpty ? nil : description,
+                    projectId: project.id
+                )
+                try await apiClient.requestVoid(
+                    endpoint: APIEndpoint.timeEntries,
+                    method: .post,
+                    body: input,
+                    authenticated: true
+                )
+            }
+            isSaving = false
+            dismiss()
+            onSave()
+        } catch {
+            isSaving = false
+            self.error = error.localizedDescription
+        }
+    }
+}
+
+// MARK: - Date rounding helper
+
+private extension Date {
+    func roundedToMinute() -> Date {
+        let cal = Calendar.current
+        var comps = cal.dateComponents([.year, .month, .day, .hour, .minute], from: self)
+        comps.second = 0
+        return cal.date(from: comps) ?? self
+    }
+}

ios/TimeTracker/TimeTracker/Features/TimeEntries/TimeEntryFormView.swift

@@ -1,171 +1,2 @@
-import SwiftUI
-
-struct TimeEntryFormView: View {
-    @Environment(\.dismiss) private var dismiss
-    
-    let entry: TimeEntry?
-    let onSave: () -> Void
-    
-    @State private var startDate = Date()
-    @State private var startTime = Date()
-    @State private var endDate = Date()
-    @State private var endTime = Date()
-    @State private var description = ""
-    @State private var selectedProject: Project?
-    @State private var projects: [Project] = []
-    @State private var isLoading = false
-    @State private var error: String?
-    
-    private let apiClient = APIClient()
-    
-    init(entry: TimeEntry? = nil, onSave: @escaping () -> Void) {
-        self.entry = entry
-        self.onSave = onSave
-    }
-    
-    var body: some View {
-        NavigationStack {
-            Form {
-                Section("Project") {
-                    Picker("Project", selection: $selectedProject) {
-                        Text("Select Project").tag(nil as Project?)
-                        ForEach(projects) { project in
-                            HStack {
-                                ProjectColorDot(color: project.color)
-                                Text(project.name)
-                            }
-                            .tag(project as Project?)
-                        }
-                    }
-                }
-                
-                Section("Start Time") {
-                    DatePicker("Date", selection: $startDate, displayedComponents: .date)
-                    DatePicker("Time", selection: $startTime, displayedComponents: .hourAndMinute)
-                }
-                
-                Section("End Time") {
-                    DatePicker("Date", selection: $endDate, displayedComponents: .date)
-                    DatePicker("Time", selection: $endTime, displayedComponents: .hourAndMinute)
-                }
-                
-                Section("Description (Optional)") {
-                    TextField("Description", text: $description, axis: .vertical)
-                        .lineLimit(3...6)
-                }
-            }
-            .navigationTitle(entry == nil ? "New Entry" : "Edit Entry")
-            .navigationBarTitleDisplayMode(.inline)
-            .toolbar {
-                ToolbarItem(placement: .cancellationAction) {
-                    Button("Cancel") {
-                        dismiss()
-                    }
-                }
-                ToolbarItem(placement: .confirmationAction) {
-                    Button("Save") {
-                        save()
-                    }
-                    .disabled(selectedProject == nil || isLoading)
-                }
-            }
-            .task {
-                await loadProjects()
-                if let entry = entry {
-                    await loadEntry(entry)
-                }
-            }
-        }
-    }
-    
-    private func loadProjects() async {
-        do {
-            projects = try await apiClient.request(
-                endpoint: APIEndpoint.projects,
-                authenticated: true
-            )
-        } catch {
-            self.error = error.localizedDescription
-        }
-    }
-    
-    private func loadEntry(_ entry: TimeEntry) async {
-        let startFormatter = DateFormatter()
-        startFormatter.dateFormat = "yyyy-MM-dd"
-        let timeFormatter = DateFormatter()
-        timeFormatter.dateFormat = "HH:mm"
-        
-        if let startDateObj = Date.fromISO8601(entry.startTime) {
-            startDate = startDateObj
-            startTime = startDateObj
-        }
-        
-        if let endDateObj = Date.fromISO8601(entry.endTime) {
-            endDate = endDateObj
-            endTime = endDateObj
-        }
-        
-        description = entry.description ?? ""
-        selectedProject = projects.first { $0.id == entry.projectId }
-    }
-    
-    private func save() {
-        guard let project = selectedProject else { return }
-        
-        isLoading = true
-        
-        let calendar = Calendar.current
-        let startDateTime = calendar.date(bySettingHour: calendar.component(.hour, from: startTime),
-                                         minute: calendar.component(.minute, from: startTime),
-                                         second: 0,
-                                         of: startDate) ?? startDate
-        let endDateTime = calendar.date(bySettingHour: calendar.component(.hour, from: endTime),
-                                        minute: calendar.component(.minute, from: endTime),
-                                        second: 0,
-                                        of: endDate) ?? endDate
-        
-        Task {
-            do {
-                if let existingEntry = entry {
-                    let input = UpdateTimeEntryInput(
-                        startTime: startDateTime.iso8601String,
-                        endTime: endDateTime.iso8601String,
-                        description: description.isEmpty ? nil : description,
-                        projectId: project.id
-                    )
-                    try await apiClient.requestVoid(
-                        endpoint: APIEndpoint.timeEntry(id: existingEntry.id),
-                        method: .put,
-                        body: input,
-                        authenticated: true
-                    )
-                } else {
-                    let input = CreateTimeEntryInput(
-                        startTime: startDateTime,
-                        endTime: endDateTime,
-                        description: description.isEmpty ? nil : description,
-                        projectId: project.id
-                    )
-                    try await apiClient.requestVoid(
-                        endpoint: APIEndpoint.timeEntries,
-                        method: .post,
-                        body: input,
-                        authenticated: true
-                    )
-                }
-                
-                await MainActor.run {
-                    isLoading = false
-                    dismiss()
-                    onSave()
-                }
-            } catch {
-                let errorMessage = error.localizedDescription
-                await MainActor.run {
-                    isLoading = false
-                    self.error = errorMessage
-                }
-            }
-        }
-    }
-}
+// TimeEntryFormView.swift — replaced by TimeEntryDetailSheet.swift
+import Foundation

ios/TimeTracker/TimeTracker/Features/Timer/TimerView.swift

@@ -116,6 +116,7 @@ struct TimerView: View {
                     .buttonStyle(.borderedProminent)
                     .tint(.red)
                     .controlSize(.large)
+                    .disabled(viewModel.selectedProject == nil && viewModel.activeTimer?.project == nil)
                 }
             }
             .padding(.horizontal, 24)

ios/TimeTracker/TimeTracker/Models/ClientTarget.swift

@@ -0,0 +1,62 @@
+import Foundation
+
+// MARK: - Client Target
+
+struct ClientTarget: Codable, Identifiable, Equatable {
+    let id: String
+    let clientId: String
+    let clientName: String
+    let userId: String
+    let weeklyHours: Double
+    let startDate: String            // "YYYY-MM-DD"
+    let createdAt: String
+    let updatedAt: String
+    let corrections: [BalanceCorrection]
+
+    // Computed balance fields returned by the API
+    let totalBalanceSeconds: Int
+    let currentWeekTrackedSeconds: Int
+    let currentWeekTargetSeconds: Int
+    let weeks: [WeekBalance]
+}
+
+// MARK: - Week Balance
+
+struct WeekBalance: Codable, Identifiable, Equatable {
+    var id: String { weekStart }
+    let weekStart: String            // "YYYY-MM-DD"
+    let weekEnd: String
+    let trackedSeconds: Int
+    let targetSeconds: Int
+    let correctionHours: Double
+    let balanceSeconds: Int
+}
+
+// MARK: - Balance Correction
+
+struct BalanceCorrection: Codable, Identifiable, Equatable {
+    let id: String
+    let date: String                 // "YYYY-MM-DD"
+    let hours: Double
+    let description: String?
+    let createdAt: String
+}
+
+// MARK: - Input Types
+
+struct CreateClientTargetInput: Codable {
+    let clientId: String
+    let weeklyHours: Double
+    let startDate: String            // "YYYY-MM-DD", must be a Monday
+}
+
+struct UpdateClientTargetInput: Codable {
+    let weeklyHours: Double?
+    let startDate: String?
+}
+
+struct CreateBalanceCorrectionInput: Codable {
+    let date: String                 // "YYYY-MM-DD"
+    let hours: Double
+    let description: String?
+}

ios/TimeTracker/TimeTracker/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,6 +1,29 @@
 {
   "images" : [
     {
+      "filename" : "app_icon.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "tinted"
+        }
+      ],
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"

ios/TimeTracker/TimeTracker/Shared/Components/StatCard.swift

@@ -29,18 +29,38 @@ struct StatCard: View {
 }
 
 extension TimeInterval {
+    /// Formats as a clock string used for the live timer display: "1:23:45" or "05:30".
     var formattedDuration: String {
-        let hours = Int(self) / 3600
-        let minutes = (Int(self) % 3600) / 60
-        let seconds = Int(self) % 60
-        
+        let totalSeconds = Int(self)
+        let hours = totalSeconds / 3600
+        let minutes = (totalSeconds % 3600) / 60
+        let seconds = totalSeconds % 60
+
         if hours > 0 {
             return String(format: "%d:%02d:%02d", hours, minutes, seconds)
         } else {
             return String(format: "%02d:%02d", minutes, seconds)
         }
     }
-    
+
+    /// Human-readable duration used in lists and cards: "3h 48min", "45min", "< 1min".
+    var formattedShortDuration: String {
+        let totalSeconds = Int(self)
+        let hours = totalSeconds / 3600
+        let minutes = (totalSeconds % 3600) / 60
+
+        if hours > 0 && minutes > 0 {
+            return "\(hours)h \(minutes)min"
+        } else if hours > 0 {
+            return "\(hours)h"
+        } else if minutes > 0 {
+            return "\(minutes)min"
+        } else {
+            return "< 1min"
+        }
+    }
+
+    /// Formats as hours with one decimal place, e.g. "3.8h".  Used by the widget.
     var formattedHours: String {
         let hours = self / 3600
         return String(format: "%.1fh", hours)

ios/TimeTracker/TimeTracker/TimeTracker.entitlements

@@ -3,6 +3,8 @@
 <plist version="1.0">
 <dict>
 	<key>com.apple.security.application-groups</key>
-	<array/>
+	<array>
+		<string>group.com.simonfranken.timetracker.app</string>
+	</array>
 </dict>
 </plist>

ios/TimeTracker/TimeTracker/TimeTrackerApp/TimeTrackerApp.swift

@@ -31,38 +31,24 @@ struct RootView: View {
 
 struct MainTabView: View {
     @State private var selectedTab = 0
-    
+
     var body: some View {
         TabView(selection: $selectedTab) {
             DashboardView()
-                .tabItem {
-                    Label("Dashboard", systemImage: "chart.bar")
-                }
+                .tabItem { Label("Dashboard", systemImage: "chart.bar") }
                 .tag(0)
-            
+
             TimerView()
-                .tabItem {
-                    Label("Timer", systemImage: "timer")
-                }
+                .tabItem { Label("Timer", systemImage: "timer") }
                 .tag(1)
-            
+
             TimeEntriesView()
-                .tabItem {
-                    Label("Entries", systemImage: "clock")
-                }
+                .tabItem { Label("Entries", systemImage: "calendar") }
                 .tag(2)
-            
-            ProjectsView()
-                .tabItem {
-                    Label("Projects", systemImage: "folder")
-                }
+
+            SettingsView()
+                .tabItem { Label("Settings", systemImage: "gearshape") }
                 .tag(3)
-            
-            ClientsView()
-                .tabItem {
-                    Label("Clients", systemImage: "person.2")
-                }
-                .tag(4)
         }
     }
 }

ios/TimeTracker/TimeTrackerWidget/TimeTrackerWidget.entitlements

@@ -3,6 +3,8 @@
 <plist version="1.0">
 <dict>
 	<key>com.apple.security.application-groups</key>
-	<array/>
+	<array>
+		<string>group.com.simonfranken.timetracker.app</string>
+	</array>
 </dict>
 </plist>

ios/TimeTracker/TimeTrackerWidget/TimeTrackerWidget.swift

@@ -12,6 +12,9 @@ struct WidgetTimer: Codable {
     let id: String
     let startTime: String
     let projectId: String?
+    let project: WidgetProjectReference?
+    let createdAt: String
+    let updatedAt: String
     
     var elapsedTime: TimeInterval {
         guard let start = ISO8601DateFormatter().date(from: startTime) else {
@@ -21,6 +24,12 @@ struct WidgetTimer: Codable {
     }
 }
 
+struct WidgetProjectReference: Codable {
+    let id: String
+    let name: String
+    let color: String?
+}
+
 struct Provider: TimelineProvider {
     private let appGroupIdentifier = "group.com.timetracker.app"
     
@@ -41,7 +50,8 @@ struct Provider: TimelineProvider {
     func getTimeline(in context: Context, completion: @escaping (Timeline<TimerEntry>) -> Void) {
         let entry = loadTimerEntry()
         
-        let nextUpdate = Calendar.current.date(byAdding: .minute, value: 15, to: Date())!
+        // Update every minute to show live timer countdown
+        let nextUpdate = Calendar.current.date(byAdding: .minute, value: 1, to: Date())!
         let timeline = Timeline(entries: [entry], policy: .after(nextUpdate))
         
         completion(timeline)
@@ -63,8 +73,8 @@ struct Provider: TimelineProvider {
             return TimerEntry(
                 date: Date(),
                 timer: timer,
-                projectName: timer.projectId,
-                projectColor: nil
+                projectName: timer.project?.name ?? timer.projectId,
+                projectColor: timer.project?.color
             )
         } catch {
             return TimerEntry(