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

.gitignore

@@ -0,0 +1,54 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+.venv/
+venv/
+env/
+ENV/
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+.coverage
+htmlcov/
+*.egg-info/
+dist/
+build/
+
+# Node
+node_modules/
+.npm
+.pnpm-store/
+*.log
+.npmrc.local
+
+# 编辑器
+.idea/
+.vscode/
+*.swp
+.DS_Store
+Thumbs.db
+
+# 项目
+.env
+.env.local
+*.sqlite
+*.sqlite3
+data/
+backups/
+logs/
+*.log
+alembic/versions/__pycache__/
+
+# 打包产物 / 临时
+*.zip
+*.tar.gz
+*.7z
+*.bak
+
+# 敏感
+secrets/
+*.pem
+*.key