Update a pin that is behind with u; switch fast-forwards

`u` moves the pin of the selection to the tip of its ref when the pin is
only behind it: a switch to that branch with exactly the tip the row
shows, nothing fetched; if the ref moved meanwhile, nothing happens. On
the superproject it fast-forwards the branch to its upstream and restores
the submodules (git pull --ff-only from the last fetch).

Switch now fast-forwards a local branch that is only behind the chosen
remote branch, unless another worktree has it checked out, and keeps a
checked-out branch that tracks it under another name. A branch with
commits of its own is still never moved.

Stage pin is dropped: switching to the branch already stages it. The
detail pane's palette wraps instead of cutting off keys. Add D29 and F59.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/tui/detail/detail.go

@@ -55,20 +55,41 @@ func (m Model) View(s *submodule.Submodule, repo *submodule.Repo) string {
 		lines[i] = ansi.Truncate(l, m.width, "…")
 	}
 	height := m.height
-	var palette string
+	var palette []string
 	if m.PaletteVisible() {
-		height-- // the palette is the last line
-		m.help.Width = 0
-		palette = ansi.Truncate(m.help.ShortHelpView(m.actions), m.width, "…")
+		palette = m.palette()
+		height -= len(palette) // the palette is at the bottom
 	}
 	if len(lines) > height {
 		lines = lines[:height]
 	}
 	body := lipgloss.NewStyle().Width(m.width).Height(height).Render(strings.Join(lines, "\n"))
-	if palette == "" {
+	if len(palette) == 0 {
 		return body
 	}
-	return body + "\n" + palette
+	return body + "\n" + strings.Join(palette, "\n")
+}
+
+// palette lays the actions out on as many lines as the width needs, so no
+// key is cut off.
+func (m Model) palette() []string {
+	m.help.Width = 0
+	var out []string
+	var cur []key.Binding
+	for _, b := range m.actions {
+		if len(cur) > 0 && lipgloss.Width(m.help.ShortHelpView(append(cur, b))) > m.width {
+			out = append(out, m.help.ShortHelpView(cur))
+			cur = nil
+		}
+		cur = append(cur, b)
+	}
+	if len(cur) > 0 {
+		out = append(out, m.help.ShortHelpView(cur))
+	}
+	for i, l := range out {
+		out[i] = ansi.Truncate(l, m.width, "…")
+	}
+	return out
 }
 
 func (m Model) lines(s *submodule.Submodule, repo *submodule.Repo) []string {

internal/tui/detail/palette_test.go

@@ -0,0 +1,41 @@
+package detail
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/charmbracelet/bubbles/key"
+	"github.com/charmbracelet/lipgloss"
+
+	"submarine/internal/tui/theme"
+)
+
+func TestPaletteWrapsInsteadOfCuttingKeys(t *testing.T) {
+	keys := []key.Binding{
+		key.NewBinding(key.WithKeys("c"), key.WithHelp("c", "copy path")),
+		key.NewBinding(key.WithKeys("u"), key.WithHelp("u", "update pin")),
+		key.NewBinding(key.WithKeys("b"), key.WithHelp("b", "switch branch")),
+		key.NewBinding(key.WithKeys("x"), key.WithHelp("x", "restore")),
+	}
+	m := New(theme.Default(), keys)
+	m.SetSize(36, 20)
+	lines := m.palette()
+	if len(lines) != 2 {
+		t.Fatalf("want 2 lines, got %q", lines)
+	}
+	all := strings.Join(lines, "\n")
+	for _, want := range []string{"copy path", "update pin", "switch branch", "x restore"} {
+		if !strings.Contains(all, want) {
+			t.Errorf("palette lacks %q: %q", want, lines)
+		}
+	}
+	for _, l := range lines {
+		if w := lipgloss.Width(l); w > 36 {
+			t.Errorf("line %q is %d wide", l, w)
+		}
+	}
+	m.SetSize(120, 20)
+	if lines := m.palette(); len(lines) != 1 {
+		t.Errorf("wide pane: want 1 line, got %q", lines)
+	}
+}