feat: initial MVP - FastAPI backend + Vue3 frontend + docker-compose

- backend: FastAPI + SQLAlchemy 2.0(async) + asyncpg + Alembic
- 7 API routes: auth/me/articles/sources/bookmarks/subscriptions/admin
- models: User/Source/Article/Bookmark/Subscription/ApiToken
- services: RSS fetcher (feedparser) + Tencent TMT translator with quota + cache + local NLLB fallback
- workers: APScheduler + asyncio pipeline (fetch -> dedupe -> insert -> translate)
- seed scripts: create_user, seed_sources (5 RSS: Reuters/BBC/Al Jazeera/NHK/DW)
- frontend: Vue 3 + Vite + Naive UI + Pinia + vue-router
- pages: Login, Feed (24h), ArticleDetail, Sources, Bookmarks, AdminSources
- deploy: docker-compose (postgres/redis/api/worker/frontend/caddy)
- docs: README, DEPLOY, architecture, acceptance

frontend/vite.config.ts

@@ -0,0 +1,29 @@
+import { defineConfig, loadEnv } from 'vite'
+import vue from '@vitejs/plugin-vue'
+import { fileURLToPath, URL } from 'node:url'
+
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, process.cwd(), '')
+  return {
+    plugins: [vue()],
+    resolve: {
+      alias: {
+        '@': fileURLToPath(new URL('./src', import.meta.url)),
+      },
+    },
+    server: {
+      host: '0.0.0.0',
+      port: 5173,
+      proxy: {
+        '/api': {
+          target: env.VITE_API_PROXY || 'http://localhost:8000',
+          changeOrigin: true,
+        },
+      },
+    },
+    build: {
+      target: 'es2020',
+      outDir: 'dist',
+    },
+  }
+})