Initial commit: WordLoop 单词学习应用

Vue 前端 + FastAPI 后端，含部署脚本与词典数据。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/database.py

@@ -0,0 +1,23 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import declarative_base, sessionmaker
+
+from config import get_settings
+
+settings = get_settings()
+
+engine = create_engine(
+    settings.database_url,
+    pool_pre_ping=True,
+    pool_recycle=3600,
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()