refactor(ui): remove q key for quit, use only ctrl+q

Removed the 'q' key as a quit option, making ctrl+q the only way to
exit the application. This prevents accidental quits and simplifies
the key binding model.

Changes:
- Removed "q" handler from handleNormalSwitch in model.go
- Updated status bar hint to show "ctrl+q" instead of "q"
- Updated help overlay to show only "ctrl+q" for quit
- Updated tests to reflect that 'q' no longer quits

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: cpcloud

internal/app/inline_input_test.go

@@ -47,10 +47,6 @@ func TestInlineInputAbsorbsKeys(t *testing.T) {
 	showHouseBefore := m.showHouse
 	sendKey(m, "tab")
 	assert.Equal(t, showHouseBefore, m.showHouse, "tab should be absorbed by inline input")
-
-	// 'q' should not quit -- inline input should still be active.
-	sendKey(m, "q")
-	assert.NotNil(t, m.inlineInput, "inline input should still be active after pressing q")
 }
 
 func TestInlineInputTypingUpdatesValue(t *testing.T) {

internal/app/mode_test.go

@@ -164,10 +164,10 @@ func TestNextTabAdvances(t *testing.T) {
 func TestQuitOnlyInNormalMode(t *testing.T) {
 	m := newTestModel()
 
-	// In edit mode, 'q' should not quit (no cmd returned).
+	// In edit mode, 'ctrl+q' should quit (returns tea.Quit).
 	sendKey(m, "i")
-	_, cmd := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("q")})
-	assert.Nil(t, cmd, "'q' should not produce a command in edit mode")
+	_, cmd := m.Update(tea.KeyMsg{Type: tea.KeyCtrlQ})
+	assert.NotNil(t, cmd, "'ctrl+q' should quit even in edit mode")
 }
 
 func TestIKeyDoesNothingInEditMode(t *testing.T) {
@@ -286,8 +286,6 @@ func TestHelpAbsorbsOtherKeys(t *testing.T) {
 	require.NotNil(t, m.helpViewport, "expected help visible")
 
 	// Keys that would normally affect the model should be absorbed.
-	sendKey(m, "q")
-	assert.NotNil(t, m.helpViewport, "help should absorb 'q' without quitting")
 	sendKey(m, "i")
 	assert.Equal(t, modeNormal, m.mode, "'i' should not switch to edit mode while help is open")
 }

internal/app/model.go

@@ -475,8 +475,6 @@ func (m *Model) handleNormalKeys(key tea.KeyMsg) (tea.Cmd, bool) {
 	case "@":
 		m.openChat()
 		return nil, true
-	case "q":
-		return tea.Quit, true
 	case keyEsc:
 		if m.inDetail() {
 			m.closeDetail()

internal/app/view.go

@@ -441,8 +441,8 @@ func (m *Model) normalModeStatusHints(modeBadge string) []statusHint {
 	} else {
 		hints = append(hints, statusHint{
 			id:       "exit",
-			full:     m.helpItem("q", "quit"),
-			compact:  m.renderKeys("q"),
+			full:     m.helpItem("ctrl+q", "quit"),
+			compact:  m.renderKeys("ctrl+q"),
 			priority: 0,
 			required: true,
 		})
@@ -776,7 +776,7 @@ func (m *Model) helpContent() string {
 				{"@", "Ask LLM"},
 				{"i", "Edit mode"},
 				{"?", "Help"},
-				{"q / ctrl+q", "Quit"},
+				{"ctrl+q", "Quit"},
 			},
 		},
 		{