fix(cliproxy): address PR review feedback

- Remove claude from PLUS_ONLY_PROVIDERS (Claude works with normal CLIProxy too)
- Fix color inconsistency: use #D97757 to match SVG brand color
- Add iflow to checkAuthCodePorts (pre-existing issue, fixed opportunistically)

src/management/oauth-port-diagnostics.ts

@@ -164,7 +164,7 @@ export async function checkAllOAuthPorts(): Promise<OAuthPortDiagnostic[]> {
  * Check OAuth ports for providers that use Authorization Code flow only
  */
 export async function checkAuthCodePorts(): Promise<OAuthPortDiagnostic[]> {
-  const providers: CLIProxyProvider[] = ['gemini', 'codex', 'agy', 'kiro', 'claude'];
+  const providers: CLIProxyProvider[] = ['gemini', 'codex', 'agy', 'iflow', 'kiro', 'claude'];
   const results: OAuthPortDiagnostic[] = [];
 
   for (const provider of providers) {