feat: migrate all 5 Vite apps from react-router to TanStack Router

Migrated backoffice, hackathon, dimentorin, gacha, qrcampaign, and
infra from custom react-router file-based routing to TanStack Router
file-based routing following the tanstack-frontend-best-practice
convention.

Key changes per app:
- New routes/ directory with __root.tsx, _public.tsx, _authenticated.tsx
- Auth guards via beforeLoad (replaces old middleware.ts)
- createFileRoute pattern for all page components
- TanStackRouterVite plugin in vite.config for auto route generation
- _components/_hooks folders colocated with routes (ignored by router)
- routeTree.gen.ts auto-generated on dev/build

Convention:
- _public/* routes redirect to dashboard if authenticated
- _authenticated/* routes redirect to /auth/login if not authenticated
- $param for dynamic segments (was [param] in old convention)
- _layout suffix for pathless layout routes

Removed:
- Old src/app/ directories from all apps
- Old src/middleware.ts files
- Custom convertPagesToRoute utility (no longer needed)
- react-router dependency usage (kept in package.json for shared libs)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/hackathon/src/main.tsx

@@ -1,35 +1,26 @@
-import { createRoot } from 'react-dom/client';
-import { StrictMode } from 'react';
-import { createBrowserRouter, RouteObject, RouterProvider } from 'react-router';
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import { RouterProvider, createRouter } from '@tanstack/react-router'
 import {
-  add404PageToRoutesChildren,
-  addErrorElementToRoutes,
-  convertPagesToRoute,
   ModalLoginProvider,
   QueryProvider,
-} from '@imphnen-frontend-service/utils';
-import { Toaster } from 'sonner';
-import { ThemeProvider } from './components/theme-provider';
-import './index.css';
+} from '@imphnen-frontend-service/utils'
+import { Toaster } from 'sonner'
+import { ThemeProvider } from './components/theme-provider'
+import { routeTree } from './routeTree.gen'
+import './index.css'
 
-const files = import.meta.glob('./app/**/*(page|layout).tsx');
-const errorFiles = import.meta.glob('./app/**/*error.tsx');
-const notFoundFiles = import.meta.glob('./app/**/*404.tsx');
-const loadingFiles = import.meta.glob('./app/**/*loading.tsx');
+const router = createRouter({ routeTree })
 
-const routes = convertPagesToRoute(files, loadingFiles) as RouteObject;
-addErrorElementToRoutes(errorFiles, routes);
-add404PageToRoutesChildren(notFoundFiles, routes);
+declare module '@tanstack/react-router' {
+  interface Register {
+    router: typeof router
+  }
+}
 
-const router = createBrowserRouter([
-  {
-    ...routes,
-  },
-]);
+const rootElement = document.getElementById('root')
 
-const rootElement = document.getElementById('root');
-
-if (!rootElement) throw new Error('Failed to find the root element');
+if (!rootElement) throw new Error('Failed to find the root element')
 
 createRoot(rootElement).render(
   <StrictMode>
@@ -42,4 +33,4 @@ createRoot(rootElement).render(
       </QueryProvider>
     </ThemeProvider>
   </StrictMode>
-);
+)