feat: stages module, mobility frontend, theme toggle, employeeOnly access control

- Add stages module with full CRUD API and admin overview island
- Add mobility overview island (Liste, Kanban, Detail CRUD views)
- Add contract PDF upload/download endpoints for mobilites
- Add light/dark theme toggle in header
- Add employeeOnly flag to hide entire modules from students (admin, students, stages)
- Add read-only GET endpoints for modules/ues/ue-modules in notes module
- Add [slug].tsx catch-all routes for direct URL navigation
- Replace old mobility table with mobilites + stages schema (migration 0004)
- Allow students to create mobilites and upload contracts
- Redirect authenticated users from / to /apps catalog

routes/(apps)/mobility/partials/overview.tsx

@@ -1,20 +1,19 @@
-import ConsultMobility from "$root/routes/(apps)/mobility/(_islands)/ConsultMobility.tsx";
 import {
   getPartialsConfig,
   makePartials,
 } from "$root/defaults/makePartials.tsx";
 import { FreshContext } from "$fresh/server.ts";
-import { State } from "$root/routes/_middleware.ts";
+import { State } from "$root/defaults/interfaces.ts";
+import MobilityOverview from "../(_islands)/MobilityOverview.tsx";
 
 // deno-lint-ignore require-await
-async function Mobility(_request: Request, _context: FreshContext<State>) {
-  return (
-    <>
-      <h1>Edit mobility</h1>
-      <ConsultMobility />
-    </>
-  );
+async function Overview(
+  _request: Request,
+  _context: FreshContext<State>,
+) {
+  return <MobilityOverview />;
 }
 
+export { Overview as Page };
 export const config = getPartialsConfig();
-export default makePartials(Mobility);
+export default makePartials(Overview);