Add ticket time tracking with reports and entry management.

Support start/stop timer, manual durations, grouped reports, and per-ticket edit/delete of time entries with undo.

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

internal/ui/layout.go

@@ -16,6 +16,9 @@ func (m Model) renderHeader() string {
 	count := m.styles.HeaderMeta.Render(fmt.Sprintf("%d tickets", m.ticketCount()))
 
 	parts := []string{brand, project, board, count}
+	if label := m.timerHeaderLabel(); label != "" {
+		parts = append(parts, m.styles.FilterHint.Render(label))
+	}
 	if m.filter != "" {
 		parts = append(parts, m.styles.FilterHint.Render(fmt.Sprintf("filter: %q", m.filter)))
 	}
@@ -51,6 +54,28 @@ func (m Model) renderBody(height int) string {
 		content := prompt + "\n" + m.input.View()
 		return lipgloss.NewStyle().Height(height).Width(m.width).Render(content)
 
+	case ModeTimeManual:
+		prompt := m.styles.InputPrompt.Render("Log time:")
+		content := prompt + "\n" + m.input.View()
+		return lipgloss.NewStyle().Height(height).Width(m.width).Render(content)
+
+	case ModeTimeEdit:
+		prompt := m.styles.InputPrompt.Render("Edit duration:")
+		content := prompt + "\n" + m.input.View()
+		return lipgloss.NewStyle().Height(height).Width(m.width).Render(content)
+
+	case ModeTimeEntries:
+		m.timeEntries.SetSize(m.width, height)
+		return m.timeEntries.View()
+
+	case ModeReport:
+		m.report.SetSize(m.width, height)
+		return m.report.View()
+
+	case ModeReportGroup:
+		menu := m.groupByMenu.View()
+		return lipgloss.NewStyle().Height(height).Width(m.width).Render(menu)
+
 	case ModeProjects:
 		m.projectList.SetSize(m.width, height)
 		return m.projectList.View()