feat(桌面与监控): 完善工作台导航和登录活动定位

- 优化桌面标签、上下文标题、前进后退、导航栏隐藏和原生菜单体验

- 补充登录会话 IP 采集、地理位置回退、管理端展示及数据库迁移

- 更新桌面发布检查、运维文档和前后端测试覆盖

backend/app/models/user_login_session.py

@@ -11,7 +11,7 @@ from app.db.base_class import Base
 
 
 class UserLoginSession(Base):
-    """Server-side login activity record without storing credentials or raw IPs."""
+    """Server-side login activity record without storing credentials."""
 
     __tablename__ = "user_login_sessions"
 
@@ -26,6 +26,7 @@ class UserLoginSession(Base):
     client_platform: Mapped[str | None] = mapped_column(String(32), nullable=True)
     client_version: Mapped[str | None] = mapped_column(String(64), nullable=True)
     client_source: Mapped[str | None] = mapped_column(String(32), nullable=True)
+    login_ip: Mapped[str | None] = mapped_column(String(45), nullable=True)
     login_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
     last_seen_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
     ended_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)