feat: 风险分定时衰减 + 密码提示修复 + 浏览器池API + next回跳

1. 风险分衰减定时任务:
   - services/scheduler.py: 每天 CST 04:00 自动执行 decay_scores()
   - 支持 RISK_SCORE_DECAY_TIME_CST 环境变量覆盖

2. 密码长度提示统一为8位:
   - app-frontend/src/pages/RegisterPage.vue
   - app-frontend/src/layouts/AppLayout.vue
   - admin-frontend/src/pages/SettingsPage.vue
   - templates/register.html

3. 浏览器池统计API:
   - GET /yuyx/api/browser_pool/stats
   - 返回 worker 状态、队列等待数等信息
   - browser_pool_worker.py: 增强 get_stats() 方法

4. 登录后支持 next 参数回跳:
   - app-frontend/src/pages/LoginPage.vue: 检查 ?next= 参数
   - 仅允许站内路径（防止开放重定向）

🤖 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-D-nWLD-A.js": {
-    "file": "assets/email-D-nWLD-A.js",
+  "_email-DSz2K4-y.js": {
+    "file": "assets/email-DSz2K4-y.js",
     "name": "email",
     "imports": [
       "index.html"
     ]
   },
-  "_system-CJ2QU_TO.js": {
-    "file": "assets/system-CJ2QU_TO.js",
+  "_system-C_4M4EtK.js": {
+    "file": "assets/system-C_4M4EtK.js",
     "name": "system",
     "imports": [
       "index.html"
     ]
   },
-  "_tasks-CEM7_KIT.js": {
-    "file": "assets/tasks-CEM7_KIT.js",
+  "_tasks-yIlAy2Ne.js": {
+    "file": "assets/tasks-yIlAy2Ne.js",
     "name": "tasks",
     "imports": [
       "index.html"
     ]
   },
-  "_users-CA0gIT8G.js": {
-    "file": "assets/users-CA0gIT8G.js",
+  "_users-BNPg4OEj.js": {
+    "file": "assets/users-BNPg4OEj.js",
     "name": "users",
     "imports": [
       "index.html"
     ]
   },
   "index.html": {
-    "file": "assets/index-akVRSJTL.js",
+    "file": "assets/index-Dx-1XhY8.js",
     "name": "index",
     "src": "index.html",
     "isEntry": true,
@@ -48,7 +48,7 @@
     ]
   },
   "src/pages/AnnouncementsPage.vue": {
-    "file": "assets/AnnouncementsPage-7ij3KbUN.js",
+    "file": "assets/AnnouncementsPage-DP-v4_4f.js",
     "name": "AnnouncementsPage",
     "src": "src/pages/AnnouncementsPage.vue",
     "isDynamicEntry": true,
@@ -60,12 +60,12 @@
     ]
   },
   "src/pages/EmailPage.vue": {
-    "file": "assets/EmailPage-CuPwCZn-.js",
+    "file": "assets/EmailPage-4etTfx9H.js",
     "name": "EmailPage",
     "src": "src/pages/EmailPage.vue",
     "isDynamicEntry": true,
     "imports": [
-      "_email-D-nWLD-A.js",
+      "_email-DSz2K4-y.js",
       "index.html"
     ],
     "css": [
@@ -73,7 +73,7 @@
     ]
   },
   "src/pages/FeedbacksPage.vue": {
-    "file": "assets/FeedbacksPage-CSDNvoUn.js",
+    "file": "assets/FeedbacksPage-BlN6FFbD.js",
     "name": "FeedbacksPage",
     "src": "src/pages/FeedbacksPage.vue",
     "isDynamicEntry": true,
@@ -85,13 +85,13 @@
     ]
   },
   "src/pages/LogsPage.vue": {
-    "file": "assets/LogsPage-DDxhRTa7.js",
+    "file": "assets/LogsPage-adLViVmd.js",
     "name": "LogsPage",
     "src": "src/pages/LogsPage.vue",
     "isDynamicEntry": true,
     "imports": [
-      "_users-CA0gIT8G.js",
-      "_tasks-CEM7_KIT.js",
+      "_users-BNPg4OEj.js",
+      "_tasks-yIlAy2Ne.js",
       "index.html"
     ],
     "css": [
@@ -99,22 +99,22 @@
     ]
   },
   "src/pages/ReportPage.vue": {
-    "file": "assets/ReportPage-CoI2Nht-.js",
+    "file": "assets/ReportPage-DxDL6AXa.js",
     "name": "ReportPage",
     "src": "src/pages/ReportPage.vue",
     "isDynamicEntry": true,
     "imports": [
       "index.html",
-      "_email-D-nWLD-A.js",
-      "_tasks-CEM7_KIT.js",
-      "_system-CJ2QU_TO.js"
+      "_email-DSz2K4-y.js",
+      "_tasks-yIlAy2Ne.js",
+      "_system-C_4M4EtK.js"
     ],
     "css": [
       "assets/ReportPage-CW7RwLmI.css"
     ]
   },
   "src/pages/SecurityPage.vue": {
-    "file": "assets/SecurityPage-CQQKpFcS.js",
+    "file": "assets/SecurityPage-BkxWxQhW.js",
     "name": "SecurityPage",
     "src": "src/pages/SecurityPage.vue",
     "isDynamicEntry": true,
@@ -126,7 +126,7 @@
     ]
   },
   "src/pages/SettingsPage.vue": {
-    "file": "assets/SettingsPage-BpSZamEk.js",
+    "file": "assets/SettingsPage-D_cVneyv.js",
     "name": "SettingsPage",
     "src": "src/pages/SettingsPage.vue",
     "isDynamicEntry": true,
@@ -134,16 +134,16 @@
       "index.html"
     ],
     "css": [
-      "assets/SettingsPage-DGdwb4W2.css"
+      "assets/SettingsPage-DKTq8S2K.css"
     ]
   },
   "src/pages/SystemPage.vue": {
-    "file": "assets/SystemPage-DUY6QC8Y.js",
+    "file": "assets/SystemPage-Cph4odbt.js",
     "name": "SystemPage",
     "src": "src/pages/SystemPage.vue",
     "isDynamicEntry": true,
     "imports": [
-      "_system-CJ2QU_TO.js",
+      "_system-C_4M4EtK.js",
       "index.html"
     ],
     "css": [
@@ -151,12 +151,12 @@
     ]
   },
   "src/pages/UsersPage.vue": {
-    "file": "assets/UsersPage-hj_Nb-9c.js",
+    "file": "assets/UsersPage-19tzoQBx.js",
     "name": "UsersPage",
     "src": "src/pages/UsersPage.vue",
     "isDynamicEntry": true,
     "imports": [
-      "_users-CA0gIT8G.js",
+      "_users-BNPg4OEj.js",
       "index.html"
     ],
     "css": [