docs: 更新文档

Author: foxhui

docs/admin/webui.md

@@ -63,7 +63,10 @@ VNC 显示功能需要服务以 Xvfb + VNC 模式运行。
 
 ### 实例管理
 
-管理浏览器实例和 Worker 配置（需要重启生效）。
+- 批量管理实例代理和删除
+- 管理浏览器实例和 Worker 配置
+
+> 均需要重启生效
 
 ## 快捷操作
 

docs/config/overview.md

@@ -26,6 +26,9 @@ backend:
     failover:
       enabled: true
       maxRetries: 2
+      imgDlRetry: false 
+      imgDlRetryMaxRetries: 2
+    waitTimeout: 120000
     instances:
       - name: "browser_default"
         workers:
@@ -156,6 +159,9 @@ browser:
 | `strategy` | string | `least_busy` | 负载均衡策略，可选：`least_busy` |
 | `failover.enabled` | boolean | `true` | 是否启用故障自动转移 |
 | `failover.maxRetries` | number | `2` | 故障转移最大重试次数 |
+| `failover.imgDlRetry` | boolean | `false` | 图片下载重试，启用后，图片/视频下载失败时会自动重试下载（不重新生成） |
+| `failover.imgDlRetryMaxRetries` | number | `2` | 下载重试次数，图片下载失败时的最大重试次数，范围 1-10 |
+| `waitTimeout` | number | `120000` | 生成等待时间，程序等待生成结果返回的最大超时时间，单位毫秒 |
 | `instances` | array | - | 浏览器实例列表，详见 [实例配置](/config/instances) |
 
 ### 适配器配置 (backend.adapter)

docs/en/admin/webui.md

@@ -67,7 +67,10 @@ The VNC display feature requires the service to be running in Xvfb + VNC mode.
 
 ### Instance Management
 
-Manage browser instance and Worker configurations (requires a restart to take effect).
+- Batch manage instance proxies and deletions
+- Manage browser instance and Worker configurations
+
+> Requires a restart to take effect
 
 ## Quick Actions
 

docs/en/config/overview.md

@@ -160,6 +160,9 @@ Performance optimization options for CPU-Only environments. Reduces CPU load by
 | `strategy` | string | `least_busy` | Load balancing strategy. Option: `least_busy`. |
 | `failover.enabled` | boolean | `true` | Whether to enable automatic failover. |
 | `failover.maxRetries` | number | `2` | Maximum retry attempts for failover. |
+| `failover.imgDlRetry` | boolean | `false` | Image download retry. When enabled, automatically retries downloading the image/video upon failure (without regenerating). |
+| `failover.imgDlRetryMaxRetries` | number | `2` | Download retry count. The maximum number of retry attempts when an image download fails, range 1-10. |
+| `waitTimeout` | number | `120000` | Generation wait time. The maximum timeout in milliseconds the program waits for the generation result to return. |
 | `instances` | array | - | List of browser instances. See [Instances Configuration](/en/config/instances). |
 
 ### Adapter Configuration (backend.adapter)