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/api/pluginData.ts

@@ -209,3 +209,54 @@ export async function getPluginEntityRegistry(): Promise<PublicEntity[]> {
   );
   return data.data;
 }
+
+// ─── 数据导入导出 API ──────────────────────────────────────────────────
+
+export interface ExportOptions {
+  filter?: Record<string, string>;
+  search?: string;
+  sort_by?: string;
+  sort_order?: 'asc' | 'desc';
+  format?: 'csv' | 'json';
+}
+
+export async function exportPluginData(
+  pluginId: string,
+  entity: string,
+  options?: ExportOptions,
+): Promise<Record<string, unknown>[]> {
+  const params: Record<string, string> = {};
+  if (options?.filter) params.filter = JSON.stringify(options.filter);
+  if (options?.search) params.search = options.search;
+  if (options?.sort_by) params.sort_by = options.sort_by;
+  if (options?.sort_order) params.sort_order = options.sort_order;
+
+  const { data } = await client.get<{ success: boolean; data: Record<string, unknown>[] }>(
+    `/plugins/${pluginId}/${entity}/export`,
+    { params },
+  );
+  return data.data;
+}
+
+export interface ImportRowError {
+  row: number;
+  errors: string[];
+}
+
+export interface ImportResult {
+  success_count: number;
+  error_count: number;
+  errors: ImportRowError[];
+}
+
+export async function importPluginData(
+  pluginId: string,
+  entity: string,
+  rows: Record<string, unknown>[],
+): Promise<ImportResult> {
+  const { data } = await client.post<{ success: boolean; data: ImportResult }>(
+    `/plugins/${pluginId}/${entity}/import`,
+    { rows },
+  );
+  return data.data;
+}