feat: add i18n

frontend/src/components/workspace/settings/skill-settings-page.tsx

@@ -35,7 +35,7 @@ export function SkillSettingsPage() {
       description={t.settings.skills.description}
     >
       {isLoading ? (
-        <div>Loading...</div>
+        <div className="text-muted-foreground text-sm">{t.common.loading}</div>
       ) : error ? (
         <div>Error: {error.message}</div>
       ) : (

frontend/src/components/workspace/settings/tool-settings-page.tsx

@@ -24,7 +24,7 @@ export function ToolSettingsPage() {
       description={t.settings.tools.description}
     >
       {isLoading ? (
-        <div>Loading...</div>
+        <div className="text-muted-foreground text-sm">{t.common.loading}</div>
       ) : error ? (
         <div>Error: {error.message}</div>
       ) : (

frontend/src/core/i18n/locales/en-US.ts

@@ -21,6 +21,7 @@ export const enUS: Translations = {
     public: "Public",
     custom: "Custom",
     notAvailableInDemoMode: "Not available in demo mode",
+    loading: "Loading...",
   },
 
   // Welcome

frontend/src/core/i18n/locales/types.ts

@@ -19,6 +19,7 @@ export interface Translations {
     public: string;
     custom: string;
     notAvailableInDemoMode: string;
+    loading: string;
   };
 
   // Welcome

frontend/src/core/i18n/locales/zh-CN.ts

@@ -21,6 +21,7 @@ export const zhCN: Translations = {
     public: "公共",
     custom: "自定义",
     notAvailableInDemoMode: "在演示模式下不可用",
+    loading: "加载中...",
   },
 
   // Welcome