refactor(frontend): split 7 oversized pages into feature co-location

Per guide ch.7 page split pattern (skeleton orchestrates, private
components live in features/<domain>/):
- InstancePage 1716->328, UsersPage 1309->240, TicketsPage 1076->195,
  TicketDetailPage 911->287, QueriesPage 883->479, LdapConfigPage 860->393,
  WorkflowPage 852->194
- new feature modules: datasource/ rbac/ ticket/ query/ system/ldap/
  governance/workflow/ (components + hooks + types + utils)
- stable keys replace index keys in dynamic lists; polling intervals
  and toast call sites preserved 1:1 (verified by agents)
- filter/pagination state moved to URL query via new useQueryState hook
  (Instance/Users/Tickets/AuditLogs pages): refresh/share/back-button
  restore state; composite updates applied atomically
- permission pure functions extracted to lib/permissions.ts (used by
  useAuth + useLogin); page-size audit: 0 pages over 700-line budget

frontend/eslint.config.js

@@ -17,7 +17,11 @@ export default defineConfig([
     ],
     languageOptions: {
       ecmaVersion: 2020,
-      globals: globals.browser,
+      globals: { ...globals.browser, ...globals.node },
+    },
+    rules: {
+      // 生产禁 console.log（允许 warn/error 上报保留）
+      'no-console': ['warn', { allow: ['warn', 'error'] }],
     },
   },
 ])