Refactor global styles and enhance MITM functionality

- Updated global CSS to implement a new brand color palette and improve light/dark theme consistency.
- Enhanced the MitmServerCard component to provide clearer user feedback regarding admin privileges.
- Filtered LLM combos in the CombosPage to ensure only relevant data is displayed.
- Improved APIPageClient layout for better usability and visual consistency.
- Added functionality to save and load DNS tool states in the MITM manager.
- Updated OAuth configuration URLs for Qwen to reflect the new endpoint structure.
- Refined tunnel management logic to improve reliability and user experience.

src/shared/components/OAuthModal.js

@@ -152,6 +152,10 @@ export default function OAuthModal({ isOpen, provider, providerInfo, onSuccess,
 
         setDeviceData(data);
 
+        // Auto-open verification URL in new tab
+        const verifyUrl = data.verification_uri_complete || data.verification_uri;
+        if (verifyUrl) window.open(verifyUrl, "_blank", "noopener,noreferrer");
+
         // Pass extraData for Kiro (contains _clientId, _clientSecret)
         const extraData = provider === "kiro"
           ? {