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/core/config.py

@@ -40,6 +40,11 @@ class Settings(BaseSettings):
     )
     MONITORING_PUBLIC_IP_DISCOVERY_TIMEOUT_SECONDS: float = Field(default=2.5, ge=0.5, le=10)
     MONITORING_SERVER_LOCATION_CACHE_SECONDS: int = Field(default=86400, ge=300, le=604800)
+    MONITORING_IP_GEO_FALLBACK_ENABLED: bool = True
+    MONITORING_IP_GEO_FALLBACK_API_KEY: Optional[str] = None
+    MONITORING_IP_GEO_FALLBACK_TIMEOUT_SECONDS: float = Field(default=2.5, ge=0.5, le=10)
+    MONITORING_IP_GEO_FALLBACK_CACHE_SECONDS: int = Field(default=604800, ge=3600, le=2592000)
+    MONITORING_IP_GEO_FALLBACK_MAX_LOOKUPS: int = Field(default=10, ge=1, le=100)
     MONITORING_ACCESS_LOG_RETENTION_DAYS: int = Field(default=90, ge=7, le=3650)
     MONITORING_METRIC_RETENTION_DAYS: int = Field(default=400, ge=30, le=3650)
     MONITORING_RETENTION_INTERVAL_SECONDS: int = Field(default=86400, ge=60, le=604800)