fix: prevent unnecessary config operations when renaming to same name

- Add validation in UI to early return when renaming config to current name
- Add server-side validation to prevent config save/delete operations

src/core/webview/ClineProvider.ts

@@ -1215,6 +1215,10 @@ export class ClineProvider implements vscode.WebviewViewProvider {
 							try {
 								const { oldName, newName } = message.values
 
+								if (oldName === newName) {
+									break
+								}
+
 								await this.configManager.saveConfig(newName, message.apiConfiguration)
 								await this.configManager.deleteConfig(oldName)