fix(GRO-213): resolve 3 type errors blocking CI

- setup.ts:73: cast result.code to 409 to satisfy ContentfulStatusCode
- SetupWizard.jsx: quote CSS rem value (2rem -> "2rem") — inline styles
  require strings for CSS units
- SetupWizard.js: rename to .jsx so Vite can parse JSX (QA requirement)
- App.tsx: update import to .jsx extension
- Add SetupWizard.d.ts type declaration for .jsx module resolution

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

apps/web/src/App.tsx

@@ -12,7 +12,7 @@ import { SettingsPage } from "./pages/Settings.js";
 import { BookingConfirmedPage } from "./pages/BookingConfirmed.js";
 import { BookingCancelledPage } from "./pages/BookingCancelled.js";
 import { BookingErrorPage } from "./pages/BookingError.js";
-import { SetupWizard } from "./pages/SetupWizard.js";
+import { SetupWizard } from "./pages/SetupWizard.jsx";
 import { CustomerPortal } from "./portal/CustomerPortal.js";
 import { DevLoginSelector, getDevUser } from "./pages/DevLoginSelector.js";
 import { DevSessionIndicator } from "./components/DevSessionIndicator.js";

apps/web/src/pages/SetupWizard.d.ts

@@ -0,0 +1 @@
+export { SetupWizard } from "./SetupWizard.jsx";

apps/web/src/pages/SetupWizard.jsx

@@ -79,7 +79,7 @@ export function SetupWizard() {
         width: "100%",
       }}>
         {/* Progress dots */}
-        <div style={{ display: "flex", gap: 6, marginBottom: 2rem, justifyContent: "center" }}>
+        <div style={{ display: "flex", gap: 6, marginBottom: "2rem", justifyContent: "center" }}>
           {STEPS.map((_, i) => (
             <div
               key={i}