✨ feat(feishu-form): 添加下载目录配置字段

- 在飞书表单中新增下载目录输入字段
- 更新中英文翻译文件添加相关文案
- 支持设置自定义下载文件目录路径

web/frontend/src/components/channels/channel-forms/feishu-form.tsx

@@ -126,6 +126,16 @@ export function FeishuForm({
           placeholder={t("channels.field.allowFromPlaceholder")}
         />
       </Field>
+      <Field
+        label={t("channels.field.downloadDir")}
+        hint={t("channels.form.desc.downloadDir")}
+      >
+        <Input
+          value={asString(config.download_dir)}
+          onChange={(e) => onChange("download_dir", e.target.value)}
+          placeholder={t("channels.field.downloadDirPlaceholder")}
+        />
+      </Field>
     </div>
   )
 }

web/frontend/src/i18n/locales/en.json

@@ -300,6 +300,8 @@
       "allowFromPlaceholder": "e.g. 123456, 789012",
       "allowOrigins": "Allow Origins",
       "allowOriginsPlaceholder": "e.g. https://example.com, http://localhost:5173",
+      "downloadDir": "Download Directory",
+      "downloadDirPlaceholder": "downloads or /absolute/path",
       "secretPlaceholder": "Enter secret",
       "secretHintSet": "A value is already set. Leave blank to keep it unchanged."
     },
@@ -331,6 +333,7 @@
         "groupTriggerPrefixes": "Custom group-chat trigger prefixes, separated by commas.",
         "isLark": "Use Lark international domain (open.larksuite.com) instead of Feishu domain (open.feishu.cn).",
         "allowFrom": "Allowed user or group IDs, separated by commas.",
+        "downloadDir": "Custom directory for downloaded files. Relative paths are resolved from the workspace directory. Leave empty to use system temp directory.",
         "allowOrigins": "Allowed origin domains, separated by commas.",
         "wsUrl": "WebSocket service URL.",
         "reconnectInterval": "Reconnect interval after disconnection (seconds).",

web/frontend/src/i18n/locales/zh.json

@@ -300,6 +300,8 @@
       "allowFromPlaceholder": "例如 123456, 789012",
       "allowOrigins": "允许来源域名",
       "allowOriginsPlaceholder": "例如 https://example.com, http://localhost:5173",
+      "downloadDir": "下载目录",
+      "downloadDirPlaceholder": "downloads 或 /absolute/path",
       "secretPlaceholder": "输入密钥",
       "secretHintSet": "已设置密钥，留空表示不修改。"
     },
@@ -331,6 +333,7 @@
         "groupTriggerPrefixes": "群聊触发前缀，多个值用逗号分隔。",
         "isLark": "使用 Lark 国际版域名（open.larksuite.com）替代飞书域名（open.feishu.cn）。",
         "allowFrom": "允许访问的用户或群组 ID，多个值用逗号分隔。",
+        "downloadDir": "自定义下载文件目录。相对路径将基于工作目录解析，留空则使用系统临时目录。",
         "allowOrigins": "允许访问的来源域名，多个值用逗号分隔。",
         "wsUrl": "WebSocket 服务地址。",
         "reconnectInterval": "断线后的重连间隔（秒）。",