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/pages/login-page.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from "react";
+import { useState } from "react";
 import { Link, useNavigate } from "react-router-dom";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { AuthForm } from "@/components/auth-form";
@@ -7,9 +7,6 @@ import { useAuthStore } from "@/store/auth-store";
 
 export function LoginPage() {
   const navigate = useNavigate();
-  useEffect(() => {
-    navigate("/dashboard");
-  }, [navigate]);
   const queryClient = useQueryClient();
   const setUser = useAuthStore((state) => state.setUser);
   const [error, setError] = useState<string | null>(null);