fix(frontend): align pages with DB schema, fix auth, and improve UX

- Fix auth system: remove redirect bugs in login/register pages, register
  routes, wrap protected routes with AuthGuard, add AuthInitializer
- Add missing navbar links (Diagnosa, Pustaka, expert Review)
- Fix DiagnosesPage status filter to match DB DiagnosisStatus enum,
  support URL params (?status=, ?risk=) from dashboard links
- Replace hardcoded disease data on Dashboard with API-driven data,
  fix layout bugs (invalid gap-57 class, empty Button)
- Rewrite LibraryPage to use API instead of mock-diseases.ts
- Indonesian-ize Expert Reviews page labels and text
- Wrap DiagnosisDetailPage with MainLayout for consistent layout
- Improve ScanPage UX: image preview before upload, lucide icons,
  proper disease names in result modal, file size validation
- Delete dead code: mock-diseases.ts, unused form components,
  tailwind.config.ts (Tailwind v4 does not read v3 config)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/web/src/components/auth-initializer.tsx

@@ -0,0 +1,21 @@
+import { useEffect } from 'react';
+import { useQuery } from '@tanstack/react-query';
+import { apiClient } from '@/lib/api-client';
+import { useAuthStore } from '@/store/auth-store';
+
+export function AuthInitializer() {
+  const setUser = useAuthStore((state) => state.setUser);
+  const query = useQuery({
+    queryKey: ['auth', 'me'],
+    queryFn: () => apiClient.getMe(),
+    retry: false,
+  });
+
+  useEffect(() => {
+    if (query.data) {
+      setUser(query.data.user);
+    }
+  }, [query.data, setUser]);
+
+  return null;
+}