feat(task-logs): 优化任务中心日志前端展示

- 引入 @tanstack/vue-virtual 实现虚拟滚动，仅渲染可见区域日志行
- 添加自动滚动开关，用户可手动控制是否自动滚动
- 实现用户滚动检测，向上滚动时暂停自动滚动，滚到底部时恢复
- 优化日志面板头部布局，添加自动滚动开关 UI

关联 PR: #119

frontend/package.json

@@ -9,19 +9,20 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "vue": "^3.3.4",
-    "vue-router": "^4.2.4",
-    "pinia": "^2.1.4",
-    "element-plus": "^2.3.12",
     "@element-plus/icons-vue": "^2.1.0",
-    "axios": "^1.5.0"
+    "@tanstack/vue-virtual": "^3.13.34",
+    "axios": "^1.5.0",
+    "element-plus": "^2.3.12",
+    "pinia": "^2.1.4",
+    "vue": "^3.3.4",
+    "vue-router": "^4.2.4"
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^5.2.4",
     "typescript": "^5.2.2",
-    "vite": "^6.4.3",
-    "vue-tsc": "^2.2.12",
     "unplugin-auto-import": "^0.16.6",
-    "unplugin-vue-components": "^0.25.2"
+    "unplugin-vue-components": "^0.25.2",
+    "vite": "^6.4.3",
+    "vue-tsc": "^2.2.12"
   }
 }