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/services/source_location_aggregator.py

@@ -20,6 +20,7 @@ from app.models.permission_access_log import PermissionAccessLog
 from app.models.security_access_log import SecurityAccessLog
 from app.models.source_location_snapshot import SourceLocationSnapshot
 from app.services.geo_location_metadata import resolve_geo_location_metadata
+from app.services.ip_geolocation_fallback import resolve_external_ip_locations
 from app.services.ip_location import resolve_ip_location
 
 logger = logging.getLogger("ctms.source_location_aggregator")
@@ -149,12 +150,31 @@ async def aggregate_source_location_hour(bucket_start: datetime, bucket_end: dat
                 auth_failure_count=auth_failures,
             )
 
+        resolved_locations = {
+            ip_address: resolve_ip_location(ip_address)
+            for ip_address, _user_identity in aggregates
+        }
+        resolved_metadata = {
+            ip_address: resolve_geo_location_metadata(ip_info)
+            for ip_address, ip_info in resolved_locations.items()
+        }
+        missing_coordinate_ips = [
+            ip_address
+            for ip_address, metadata in resolved_metadata.items()
+            if metadata.accuracy_level != "private"
+            and (metadata.longitude is None or metadata.latitude is None)
+        ]
+        external_locations = await resolve_external_ip_locations(missing_coordinate_ips)
+        for ip_address, external_location in external_locations.items():
+            resolved_locations[ip_address] = external_location.merge_ip_location(resolved_locations[ip_address])
+            resolved_metadata[ip_address] = external_location.to_metadata()
+
         await session.execute(
             delete(SourceLocationSnapshot).where(SourceLocationSnapshot.bucket_time == bucket_start)
         )
         for row in aggregates.values():
-            ip_info = resolve_ip_location(row["ip_address"])
-            metadata = resolve_geo_location_metadata(ip_info)
+            ip_info = resolved_locations[row["ip_address"]]
+            metadata = resolved_metadata[row["ip_address"]]
             longitude = metadata.longitude
             latitude = metadata.latitude
             country = metadata.country or ip_info.country