Add backend/frontend scaffolding with Oracle ADB wallet config

- Backend: Spring Boot 3 + WebFlux, JWT auth, Oracle ADB wallet,
  8 controllers/services/repositories (Auth~Tag), DTOs, exception handling
- Frontend: Next.js 15, TypeScript, Tailwind CSS, AuthContext,
  7 pages (dashboard, knowledge, chat, study, todos, habits, login)
- DB: V1 migration with 12 tables including VECTOR(1024) + HNSW index
- Ops: PM2 ecosystem config, deploy.sh, start-backend.sh
- CLAUDE.md: DB credentials replaced with env var references

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

sundol-frontend/src/app/page.tsx

@@ -0,0 +1,22 @@
+"use client";
+
+import { useEffect } from "react";
+import { useRouter } from "next/navigation";
+import { useAuth } from "@/lib/auth-context";
+
+export default function Home() {
+  const router = useRouter();
+  const { isAuthenticated, isLoading } = useAuth();
+
+  useEffect(() => {
+    if (!isLoading) {
+      router.replace(isAuthenticated ? "/dashboard" : "/login");
+    }
+  }, [isAuthenticated, isLoading, router]);
+
+  return (
+    <div className="flex items-center justify-center min-h-screen">
+      <div className="text-[var(--color-text-muted)]">Loading...</div>
+    </div>
+  );
+}