feat(assets): 合入完整故障管理并升级至 v1.2.3

Integrate fault management from fault_1013_improve at 1674f05, including overview, trend and weekly reports, multidimensional analysis, authorized fault details, L1 follow-up, source breakdown and Excel exports. Adapt database imports, cross-layer tests and workbook helpers to the main architecture; retain unrelated main functionality.

Validation: TypeScript check, 502 tests, production build, desktop/mobile interactions and six-sheet Excel export passed.

package.json

@@ -1,7 +1,7 @@
 {
   "name": "ln-bi",
   "private": true,
-  "version": "1.2.2",
+  "version": "1.2.3",
   "type": "module",
   "scripts": {
     "dev:local": "concurrently -k -n server,client \"npm run dev:local:server\" \"npm run dev:local:client\"",
@@ -25,6 +25,7 @@
     "cn": "^0.4.0",
     "dotenv": "^16.4.0",
     "echarts": "^6.1.0",
+    "exceljs": "^4.4.0",
     "hono": "^4.7.0",
     "jsonwebtoken": "^9.0.3",
     "lucide-react": "^0.546.0",