fix: Address PR review comments

- Fix window.Electron to window.isElectron in http-api-client.ts
- Use void operator instead of async/await for onClick handlers in git-diff-panel.tsx
- Fix critical bug: correct parameter order in useStartAutoMode (maxConcurrency was passed as branchName)
- Add error handling for getApiKeys() result in use-cli-status.ts
- Add authClaude guard in claude-cli-status.tsx for consistency with deauthClaude
- Add optional chaining on api object in cursor-cli-status.tsx

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/hooks/queries/use-cli-status.ts

@@ -69,6 +69,9 @@ export function useApiKeysStatus() {
         throw new Error('Setup API not available');
       }
       const result = await api.setup.getApiKeys();
+      if (!result.success) {
+        throw new Error('Failed to fetch API keys');
+      }
       return result;
     },
     staleTime: STALE_TIMES.CLI_STATUS,