Initial commit: RSS platform phase 1 skeleton with code review fixes

Features:
- FastAPI + SQLAlchemy 2.0 async + PostgreSQL/pgvector + Redis backend
- Vue 3 + TypeScript + Element Plus frontend
- JWT auth with access/refresh tokens and revocation
- Admin/member RBAC
- RSS feed CRUD and article listing
- Settings management with Fernet encryption for sensitive values
- Redis distributed lock service
- Alembic initial migration
- Docker Compose development environment

Fixes from code review:
- Fix DB session leak in dependency injection
- Restrict registration to admin only
- Add default admin password warning
- Implement JWT refresh tokens and jti blacklist
- Strengthen password policy
- Use func.count for pagination totals
- Replace NullPool with AsyncAdaptedQueuePool
- Remove init_db from lifespan to enforce alembic migrations
- Add request_id middleware and logging filter
- Fix vite.config.ts env loading
- Add frontend token refresh interceptor
- Add Vue error handler

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/vite.config.ts

@@ -0,0 +1,31 @@
+import { defineConfig, loadEnv } from 'vite'
+import vue from '@vitejs/plugin-vue'
+import { resolve } from 'path'
+
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, process.cwd(), '')
+  const apiTarget = env.VITE_API_BASE_URL || 'http://localhost:8000'
+
+  return {
+    plugins: [vue()],
+    resolve: {
+      alias: {
+        '@': resolve(__dirname, 'src'),
+      },
+    },
+    server: {
+      port: 5173,
+      host: true,
+      proxy: {
+        '/api': {
+          target: apiTarget,
+          changeOrigin: true,
+        },
+        '/health': {
+          target: apiTarget,
+          changeOrigin: true,
+        },
+      },
+    },
+  }
+})