feat(workflow-bar): optimistic F1 at start; all-green when session finalized

frontend/src/shell/f1-loop.test.tsx

@@ -38,6 +38,9 @@ test("F1: create session -> widget via SSE -> respond -> POST /response", async
   // Wait for the session to be created and SSE to connect
   await waitFor(() => expect(FakeEventSource.instances).toHaveLength(1));
 
+  // Optimistic lifecycle: a brand-new question paints F1 immediately (before any gate).
+  await waitFor(() => expect(useSessionStore.getState().currentPhase).toBe("F1"));
+
   // Simulate the backend emitting the F1 widget via a NAMED SSE event
   // (`event: ui_request`) — the same addEventListener path production uses.
   act(() =>