fix(GRO-2011): always fetch /api/setup/status, even for unauth users

The second useEffect in App skipped the setup/status fetch when
`!authDisabled && !session` was true. In the deployed bundle the
`needsSetup` state therefore stayed `null` for unauth users, and a
later render short-circuit rendered nothing — producing the blank
white viewport at https://uat.groombook.dev/login.

Drop the unauth skip clause so `/api/setup/status` is always fetched
as soon as the auth state is known. The unauth branch in the render
is handled before `needsSetup` is consulted, so this is safe and
removes the stuck-`null` state.

Adds:
- New unit test in src/__tests__/App.test.tsx asserting the
  unauthenticated path calls /api/setup/status.
- UAT playbook entry TC-WEB-5.1.5 covering the blank-viewport
  regression scenario.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

UAT_PLAYBOOK.md

@@ -53,6 +53,7 @@ export const { signIn, signOut, useSession, changePassword } = authClient;
 | TC-WEB-5.1.2 | OIDC redirect | Click OIDC login button | Redirected to OIDC provider, then back to app with session established |
 | TC-WEB-5.1.3 | Logout | Click logout button | Session cleared, redirected to login page |
 | TC-WEB-5.1.4 | Session indicator | After successful login | User info/initials visible in UI indicating active session |
+| TC-WEB-5.1.5 | Unauthenticated `/login` renders the form (GRO-2011) | In a private/incognito window with no session cookie, navigate to UAT `/login` | React root mounts; the GroomBook sign-in card with the OIDC button is visible. Network tab shows `/api/auth/get-session` 200, `/api/setup/status` 200, and the login form is rendered (NOT a blank white viewport). |
 
 ### 5.2 Authentication — VITE_API_URL Set
 

src/App.tsx

@@ -327,11 +327,16 @@ export function App() {
       .catch(() => setAuthDisabled(false));
   }, []);
 
-  // After session is confirmed, check if setup is needed
+  // After session is confirmed, check if setup is needed.
+  // Always run the setup/status fetch as soon as the auth state is known — even for
+  // unauthenticated users, so the `needsSetup` value is in place if they sign in
+  // mid-session. The unauth branch in the render below is handled before
+  // `needsSetup` is consulted, so this is safe and avoids a stuck-`null` state.
+  // See GRO-2011.
   useEffect(() => {
     if (authDisabled === null || sessionLoading) return;
-    // Skip if no authenticated session (will redirect to login or dev selector)
-    if (!authDisabled && !session) return;
+    // In dev mode, only fetch when a dev user has been selected — otherwise the
+    // user is mid-redirect to the dev login selector and we don't need setup state.
     if (authDisabled && !getDevUser()) return;
 
     fetch("/api/setup/status")

src/__tests__/App.test.tsx

@@ -121,6 +121,65 @@ describe("App navigation", () => {
   });
 });
 
+describe("GRO-2011 — setup/status fetch for unauthenticated users", () => {
+  it("calls /api/setup/status for unauthenticated users so needsSetup is never stuck null", async () => {
+    const setupStatusCalls: string[] = [];
+
+    global.fetch = vi.fn((url: string) => {
+      if (url === "/api/dev/config") {
+        return Promise.resolve({
+          ok: true,
+          json: async () => ({ authDisabled: false }),
+        } as Response);
+      }
+      if (url === "/api/auth/get-session") {
+        // Better Auth returns 200 with null session for unauthenticated users.
+        return Promise.resolve({
+          ok: true,
+          json: async () => null,
+        } as unknown as Response);
+      }
+      if (url === "/api/setup/status") {
+        setupStatusCalls.push(url);
+        return Promise.resolve({
+          ok: true,
+          json: async () => ({ needsSetup: false }),
+        } as Response);
+      }
+      if (url === "/api/branding") {
+        return Promise.resolve({
+          ok: true,
+          json: async () => ({
+            businessName: "GroomBook",
+            primaryColor: "#4f8a6f",
+            accentColor: "#8b7355",
+            logoBase64: null,
+            logoMimeType: null,
+          }),
+        } as Response);
+      }
+      return Promise.resolve({ ok: true, json: async () => [] } as Response);
+    }) as unknown as typeof fetch;
+
+    render(
+      <MemoryRouter initialEntries={["/login"]}>
+        <App />
+      </MemoryRouter>
+    );
+
+    // The login page should be rendered for the unauthenticated user.
+    await screen.findByText("Sign in to continue");
+
+    // Crucially, /api/setup/status must be called even when the user is unauthenticated —
+    // otherwise `needsSetup` stays null and a later code path can short-circuit to a
+    // blank page (GRO-2011).
+    await waitFor(() => {
+      expect(setupStatusCalls.length).toBeGreaterThanOrEqual(1);
+    });
+    expect(setupStatusCalls[0]).toBe("/api/setup/status");
+  });
+});
+
 describe("Dev login selector", () => {
   it("redirects to /login when auth is disabled and no user selected", async () => {
     global.fetch = vi.fn((url: string) => {