fix(frontend): harden account data batch import

frontend/src/i18n/locales/en.ts

@@ -3150,6 +3150,9 @@ export default {
       dataImporting: 'Importing...',
       dataImportSelectFile: 'Please select a data file',
       dataImportParseFailed: 'Failed to parse data file',
+      dataImportParseFailedFile: 'Failed to parse {name}',
+      dataImportInvalidFile: '{name} is not a supported data export file',
+      dataImportIgnoredFiles: 'Ignored {count} non-JSON file(s)',
       dataImportFailed: 'Data import failed',
       dataImportResult: 'Import Result',
       dataImportResultSummary: 'Proxies created {proxy_created}, reused {proxy_reused}, failed {proxy_failed}; Accounts created {account_created}, failed {account_failed}',

frontend/src/i18n/locales/zh.ts

@@ -3225,6 +3225,9 @@ export default {
       dataImporting: '导入中...',
       dataImportSelectFile: '请选择数据文件',
       dataImportParseFailed: '数据解析失败',
+      dataImportParseFailedFile: '文件 {name} 解析失败',
+      dataImportInvalidFile: '文件 {name} 不是受支持的导出数据文件',
+      dataImportIgnoredFiles: '已忽略 {count} 个非 JSON 文件',
       dataImportFailed: '数据导入失败',
       dataImportResult: '导入结果',
       dataImportResultSummary: '代理创建 {proxy_created}，复用 {proxy_reused}，失败 {proxy_failed}；账号创建 {account_created}，失败 {account_failed}',