fix(i18n): wrap untranslated frontend strings and add i18n lint rule (#37776)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

superset-frontend/plugins/plugin-chart-table/src/DataTable/DataTable.tsx

@@ -29,6 +29,7 @@ import {
   useMemo,
 } from 'react';
 import { typedMemo, usePrevious } from '@superset-ui/core';
+import { t } from '@apache-superset/core';
 import {
   useTable,
   usePagination,
@@ -562,7 +563,7 @@ export default typedMemo(function DataTable<D extends object>({
             <Flex wrap align="center" gap="middle">
               {serverPagination && (
                 <Space size="small" className="search-select-container">
-                  <span className="search-by-label">Search by:</span>
+                  <span className="search-by-label">{t('Search by')}:</span>
                   <SearchSelectDropdown
                     searchOptions={searchOptions}
                     value={serverPaginationData?.searchColumn || ''}

superset-frontend/plugins/plugin-chart-table/src/DataTable/components/GlobalFilter.tsx

@@ -25,6 +25,7 @@ import {
   Ref,
 } from 'react';
 import { Row, FilterValue } from 'react-table';
+import { t, tn } from '@apache-superset/core';
 import { Input, type InputRef, Space } from '@superset-ui/core/components';
 import useAsyncState from '../utils/useAsyncState';
 
@@ -59,11 +60,11 @@ function DefaultSearchInput({
 }: SearchInputProps) {
   return (
     <Space direction="horizontal" size={4} className="dt-global-filter">
-      Search
+      {t('Search')}
       <Input
         size="small"
         ref={inputRef}
-        placeholder={`${count} records...`}
+        placeholder={tn('%s record...', '%s records...', count, count)}
         value={value}
         onChange={onChange}
         onBlur={onBlur}