feat(plugin): P2-4 数据导入导出 — 后端 export/import API + 前端 UI + TS 修复

- data_service: export 方法查询匹配行(上限10000)，import 方法逐行校验+插入
- data_handler: export_plugin_data / import_plugin_data 处理函数
- module: 注册 GET /export + POST /import 路由
- pluginData.ts: exportPluginData / importPluginData API 函数
- PluginCRUDPage: 根据 entity importable/exportable 标志显示导出/导入按钮
- PluginMarket: 修复 TS 错误 (unused imports, type narrowing)
- PluginSettingsForm: 修复 TS 错误 (Rule type, Divider orientation)

apps/web/src/components/PluginSettingsForm.tsx

@@ -92,7 +92,7 @@ const PluginSettingsForm: React.FC<PluginSettingsFormProps> = ({
       </span>
     );
 
-    const rules: Array<{ required: boolean; message?: string; type?: string }> = [];
+    const rules: Array<{ required: boolean; message?: string; type?: 'string' | 'number' | 'boolean' | 'url' | 'email' }> = [];
     if (field.required) {
       rules.push({ required: true, message: `请输入${field.display_name}` });
     }
@@ -124,7 +124,7 @@ const PluginSettingsForm: React.FC<PluginSettingsFormProps> = ({
       {groupEntries.map(([group, groupFields], gi) => (
         <React.Fragment key={group || `__default_${gi}`}>
           {group ? (
-            <Divider orientation="left" orientationMargin={0}>
+            <Divider type="horizontal" orientationMargin={0} plain>
               <Text strong>{group}</Text>
             </Divider>
           ) : null}