加入用户登录体系，session cookie 鉴权，默认账号 admin/admin123

ft-app/app/seed.py

@@ -1,7 +1,7 @@
 """Seed database from existing data files. Run once manually or on first start."""
 from datetime import date
 from app.database import engine, Base, SessionLocal
-from app.models import DailyBar, PositionSnapshot, Product, Contract
+from app.models import DailyBar, PositionSnapshot, Product, Contract, User
 from app.engine.lock_strategy import compute_amp_5d
 
 # --- Seed OHLCV data ---
@@ -202,6 +202,16 @@ def seed():
     db = SessionLocal()
 
     try:
+        # --- Seed default user ---
+        if not db.query(User).first():
+            admin = User(
+                username="admin",
+                password_hash=User.hash_password("admin123"),
+                role="admin",
+            )
+            db.add(admin)
+            db.flush()
+
         # --- Seed products and contracts ---
         if not db.query(Product).first():
             fg = Product(code="FG", name="玻璃", exchange="CZCE")