中文：收口权限与中心/立项配置改造

backend/app/models/site.py

@@ -16,6 +16,7 @@ class Site(Base):
     name: Mapped[str] = mapped_column(String(200), nullable=False)
     city: Mapped[str | None] = mapped_column(String(100), nullable=True)
     pi_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
+    phone: Mapped[str | None] = mapped_column(String(100), nullable=True)
     contact: Mapped[str | None] = mapped_column(String(100), nullable=True)
     is_active: Mapped[bool] = mapped_column(Boolean, nullable=False, server_default="true")
     enrollment_target: Mapped[int | None] = mapped_column(Integer, nullable=True)

backend/app/models/user.py

@@ -33,7 +33,7 @@ class User(Base):
     password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
     full_name: Mapped[str] = mapped_column(String(255), nullable=False)
     role: Mapped[UserRole] = mapped_column(Enum(UserRole, name="user_role"), nullable=False)
-    department: Mapped[str] = mapped_column(String(255), nullable=False)
+    clinical_department: Mapped[str] = mapped_column(String(255), nullable=False)
     status: Mapped[UserStatus] = mapped_column(
         Enum(UserStatus, name="user_status"),
         nullable=False,