perf(frontend): split admin bundles and tighten data fetching

Add next/dynamic lazy loading for database, logs, and settings heavy
modules; migrate access-logs and task-executions to React Query; parallelize
login auth-sources with public config; consolidate users table tooltips;
enable lazy image decoding; and replace barrel @/lib/services imports with
direct module paths.

frontend/hooks/use-public-config.ts

@@ -1,5 +1,5 @@
 import {useQuery} from '@tanstack/react-query'
-import {ConfigService} from '@/lib/services'
+import {ConfigService} from '@/lib/services/config'
 
 /**
  * 获取公共配置（使用 React Query 进行统一缓存与自动同步）