i18n(market): say "extensions" not "plugins" in the marketplace count

The marketplace now lists plugins, MCPs and skills, so the item count
("Total N plugins") read wrong. Update market.totalPlugins and
market.searchResults to "extensions" across all 8 locales.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/i18n/locales/en-US.ts

@@ -631,8 +631,8 @@ const enUS = {
   },
   market: {
     searchPlaceholder: 'Search plugins...',
-    searchResults: 'Found {{count}} plugins',
-    totalPlugins: 'Total {{count}} plugins',
+    searchResults: 'Found {{count}} extensions',
+    totalPlugins: 'Total {{count}} extensions',
     noPlugins: 'No plugins available',
     noResults: 'No relevant plugins found',
     loadingMore: 'Loading more...',

web/src/i18n/locales/es-ES.ts

@@ -644,8 +644,8 @@ const esES = {
   },
   market: {
     searchPlaceholder: 'Buscar plugins...',
-    searchResults: 'Se encontraron {{count}} plugins',
-    totalPlugins: 'Total {{count}} plugins',
+    searchResults: 'Se encontraron {{count}} extensiones',
+    totalPlugins: 'Total {{count}} extensiones',
     noPlugins: 'No hay plugins disponibles',
     noResults: 'No se encontraron plugins relevantes',
     loadingMore: 'Cargando más...',

web/src/i18n/locales/ja-JP.ts

@@ -636,8 +636,8 @@ const jaJP = {
   },
   market: {
     searchPlaceholder: 'プラグインを検索...',
-    searchResults: '{{count}} 個のプラグインが見つかりました',
-    totalPlugins: '合計 {{count}} 個のプラグイン',
+    searchResults: '{{count}} 個の拡張機能が見つかりました',
+    totalPlugins: '合計 {{count}} 個の拡張機能',
     noPlugins: '利用可能なプラグインがありません',
     noResults: '関連するプラグインが見つかりません',
     loadingMore: 'さらに読み込み中...',

web/src/i18n/locales/ru-RU.ts

@@ -642,8 +642,8 @@ const ruRU = {
   },
   market: {
     searchPlaceholder: 'Поиск плагинов...',
-    searchResults: 'Найдено {{count}} плагинов',
-    totalPlugins: 'Всего {{count}} плагинов',
+    searchResults: 'Найдено {{count}} расширений',
+    totalPlugins: 'Всего {{count}} расширений',
     noPlugins: 'Нет доступных плагинов',
     noResults: 'Подходящие плагины не найдены',
     loadingMore: 'Загрузка ещё...',

web/src/i18n/locales/th-TH.ts

@@ -623,8 +623,8 @@ const thTH = {
   },
   market: {
     searchPlaceholder: 'ค้นหาปลั๊กอิน...',
-    searchResults: 'พบ {{count}} ปลั๊กอิน',
-    totalPlugins: 'ทั้งหมด {{count}} ปลั๊กอิน',
+    searchResults: 'พบ {{count}} ส่วนขยาย',
+    totalPlugins: 'ทั้งหมด {{count}} ส่วนขยาย',
     noPlugins: 'ไม่มีปลั๊กอินที่พร้อมใช้งาน',
     noResults: 'ไม่พบปลั๊กอินที่เกี่ยวข้อง',
     loadingMore: 'กำลังโหลดเพิ่มเติม...',

web/src/i18n/locales/vi-VN.ts

@@ -637,8 +637,8 @@ const viVN = {
   },
   market: {
     searchPlaceholder: 'Tìm kiếm plugin...',
-    searchResults: 'Tìm thấy {{count}} plugin',
-    totalPlugins: 'Tổng cộng {{count}} plugin',
+    searchResults: 'Tìm thấy {{count}} tiện ích mở rộng',
+    totalPlugins: 'Tổng cộng {{count}} tiện ích mở rộng',
     noPlugins: 'Không có plugin nào',
     noResults: 'Không tìm thấy plugin liên quan',
     loadingMore: 'Đang tải thêm...',

web/src/i18n/locales/zh-Hans.ts

@@ -605,8 +605,8 @@ const zhHans = {
   },
   market: {
     searchPlaceholder: '搜索插件...',
-    searchResults: '搜索到 {{count}} 个插件',
-    totalPlugins: '共 {{count}} 个插件',
+    searchResults: '搜索到 {{count}} 个扩展',
+    totalPlugins: '共 {{count}} 个扩展',
     noPlugins: '暂无插件',
     noResults: '未找到相关插件',
     loadingMore: '加载更多...',

web/src/i18n/locales/zh-Hant.ts

@@ -605,8 +605,8 @@ const zhHant = {
   },
   market: {
     searchPlaceholder: '搜尋插件...',
-    searchResults: '搜尋到 {{count}} 個插件',
-    totalPlugins: '共 {{count}} 個插件',
+    searchResults: '搜尋到 {{count}} 個擴展',
+    totalPlugins: '共 {{count}} 個擴展',
     noPlugins: '暫無插件',
     noResults: '未找到相關插件',
     loadingMore: '載入更多...',