Add shortcuts hint and panel for discoverability (#18035)

packages/cli/src/test-utils/mockCommandContext.ts

@@ -60,6 +60,7 @@ export const createMockCommandContext = (
       setPendingItem: vi.fn(),
       loadHistory: vi.fn(),
       toggleCorgiMode: vi.fn(),
+      toggleShortcutsHelp: vi.fn(),
       toggleVimEnabled: vi.fn(),
       openAgentConfigDialog: vi.fn(),
       closeAgentConfigDialog: vi.fn(),