fix(mcp): update OAuth client names and improve MCP commands

- Rename MCP OAuth client names from 'Gemini CLI' to 'Qwen Code'
- Update MCP add/remove/list commands with improved error handling
- Add comprehensive tests for OAuth provider
- Fix token storage test assertions
- Clean up unused i18n translation keys
- Update gemini-converter and window title references

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

packages/cli/src/ui/AppContainer.tsx

@@ -1229,7 +1229,7 @@ export const AppContainer = (props: AppContainerProps) => {
 
   useKeypress(handleGlobalKeypress, { isActive: true });
 
-  // Update terminal title with Gemini CLI status and thoughts
+  // Update terminal title with Qwen Code status and thoughts
   useEffect(() => {
     // Respect both showStatusInTitle and hideWindowTitle settings
     if (
@@ -1256,7 +1256,7 @@ export const AppContainer = (props: AppContainerProps) => {
       lastTitleRef.current = paddedTitle;
       stdout.write(`\x1b]2;${paddedTitle}\x07`);
     }
-    // Note: We don't need to reset the window title on exit because Gemini CLI is already doing that elsewhere
+    // Note: We don't need to reset the window title on exit because Qwen Code is already doing that elsewhere
   }, [
     streamingState,
     thought,