feat: KDocs 上传增强 + 离线监控 + Bug修复

KDocs 上传功能增强:
- 搜索优化：只用姓名搜索 + C列验证，避免匹配到错误单元格
- 有效行范围：支持配置起始行/结束行，限制上传区域
- 图片覆盖：支持覆盖单元格已有图片（Escape + Delete）
- 配置持久化：kdocs_row_start/row_end 保存到数据库（v18迁移）

二次登录功能:
- 登录后立即再次登录，让"上次登录时间"显示为刚刚

KDocs 离线监控:
- 每5分钟检测金山文档登录状态
- 离线时发送邮件通知管理员（每次掉线只通知一次）
- 恢复在线后重置通知状态

Bug 修复:
- 任务日志搜索账号关键词报错500：添加异常处理

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

static/admin/.vite/manifest.json

@@ -1,34 +1,34 @@
 {
-  "_email-BBYDqLKN.js": {
-    "file": "assets/email-BBYDqLKN.js",
+  "_email-C4xyG93p.js": {
+    "file": "assets/email-C4xyG93p.js",
     "name": "email",
     "imports": [
       "index.html"
     ]
   },
-  "_system-BDTy0cf_.js": {
-    "file": "assets/system-BDTy0cf_.js",
+  "_system-C6kBIFhi.js": {
+    "file": "assets/system-C6kBIFhi.js",
     "name": "system",
     "imports": [
       "index.html"
     ]
   },
-  "_tasks-CeZTKYlS.js": {
-    "file": "assets/tasks-CeZTKYlS.js",
+  "_tasks-dxahzB_w.js": {
+    "file": "assets/tasks-dxahzB_w.js",
     "name": "tasks",
     "imports": [
       "index.html"
     ]
   },
-  "_users-CWMQV7em.js": {
-    "file": "assets/users-CWMQV7em.js",
+  "_users-ecMaaAFD.js": {
+    "file": "assets/users-ecMaaAFD.js",
     "name": "users",
     "imports": [
       "index.html"
     ]
   },
   "index.html": {
-    "file": "assets/index-BDEpmftQ.js",
+    "file": "assets/index-DKH_HvPt.js",
     "name": "index",
     "src": "index.html",
     "isEntry": true,
@@ -44,11 +44,11 @@
       "src/pages/SettingsPage.vue"
     ],
     "css": [
-      "assets/index-DxTKnDeo.css"
+      "assets/index-_5Ec1Hmd.css"
     ]
   },
   "src/pages/AnnouncementsPage.vue": {
-    "file": "assets/AnnouncementsPage-D9Qeb7XP.js",
+    "file": "assets/AnnouncementsPage-kpoSCxEP.js",
     "name": "AnnouncementsPage",
     "src": "src/pages/AnnouncementsPage.vue",
     "isDynamicEntry": true,
@@ -60,12 +60,12 @@
     ]
   },
   "src/pages/EmailPage.vue": {
-    "file": "assets/EmailPage-wPg_LfpQ.js",
+    "file": "assets/EmailPage-CEtsoP5P.js",
     "name": "EmailPage",
     "src": "src/pages/EmailPage.vue",
     "isDynamicEntry": true,
     "imports": [
-      "_email-BBYDqLKN.js",
+      "_email-C4xyG93p.js",
       "index.html"
     ],
     "css": [
@@ -73,7 +73,7 @@
     ]
   },
   "src/pages/FeedbacksPage.vue": {
-    "file": "assets/FeedbacksPage-DZkgKcO5.js",
+    "file": "assets/FeedbacksPage-ByHln3Ce.js",
     "name": "FeedbacksPage",
     "src": "src/pages/FeedbacksPage.vue",
     "isDynamicEntry": true,
@@ -85,13 +85,13 @@
     ]
   },
   "src/pages/LogsPage.vue": {
-    "file": "assets/LogsPage-CjnNneeo.js",
+    "file": "assets/LogsPage-vZFAwgb-.js",
     "name": "LogsPage",
     "src": "src/pages/LogsPage.vue",
     "isDynamicEntry": true,
     "imports": [
-      "_users-CWMQV7em.js",
-      "_tasks-CeZTKYlS.js",
+      "_users-ecMaaAFD.js",
+      "_tasks-dxahzB_w.js",
       "index.html"
     ],
     "css": [
@@ -99,22 +99,22 @@
     ]
   },
   "src/pages/ReportPage.vue": {
-    "file": "assets/ReportPage-CuHgaMnw.js",
+    "file": "assets/ReportPage--ClMBhif.js",
     "name": "ReportPage",
     "src": "src/pages/ReportPage.vue",
     "isDynamicEntry": true,
     "imports": [
       "index.html",
-      "_email-BBYDqLKN.js",
-      "_tasks-CeZTKYlS.js",
-      "_system-BDTy0cf_.js"
+      "_email-C4xyG93p.js",
+      "_tasks-dxahzB_w.js",
+      "_system-C6kBIFhi.js"
     ],
     "css": [
       "assets/ReportPage-Q8rCsG8A.css"
     ]
   },
   "src/pages/SecurityPage.vue": {
-    "file": "assets/SecurityPage-hp7dnVAc.js",
+    "file": "assets/SecurityPage-DBhX0IuO.js",
     "name": "SecurityPage",
     "src": "src/pages/SecurityPage.vue",
     "isDynamicEntry": true,
@@ -126,7 +126,7 @@
     ]
   },
   "src/pages/SettingsPage.vue": {
-    "file": "assets/SettingsPage-DfeoFZRa.js",
+    "file": "assets/SettingsPage-D91FOriC.js",
     "name": "SettingsPage",
     "src": "src/pages/SettingsPage.vue",
     "isDynamicEntry": true,
@@ -138,25 +138,25 @@
     ]
   },
   "src/pages/SystemPage.vue": {
-    "file": "assets/SystemPage-CMSxrPFY.js",
+    "file": "assets/SystemPage-DVj-4Lnp.js",
     "name": "SystemPage",
     "src": "src/pages/SystemPage.vue",
     "isDynamicEntry": true,
     "imports": [
-      "_system-BDTy0cf_.js",
+      "_system-C6kBIFhi.js",
       "index.html"
     ],
     "css": [
-      "assets/SystemPage-DHDS5_BP.css"
+      "assets/SystemPage-C8GQyKcD.css"
     ]
   },
   "src/pages/UsersPage.vue": {
-    "file": "assets/UsersPage-CPdD81iA.js",
+    "file": "assets/UsersPage-C_vL5-r3.js",
     "name": "UsersPage",
     "src": "src/pages/UsersPage.vue",
     "isDynamicEntry": true,
     "imports": [
-      "_users-CWMQV7em.js",
+      "_users-ecMaaAFD.js",
       "index.html"
     ],
     "css": [