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/lib/tunnel/cloudflared.js

@@ -257,10 +257,8 @@ export async function spawnCloudflared(tunnelToken) {
         }
         return;
       }
-      // Only notify on unexpected exit AFTER successful connection
-      if (wasConnected && unexpectedExitHandler) {
-        unexpectedExitHandler();
-      }
+      // Watchdog (initializeApp) handles recovery — no auto-reconnect here
+      if (wasConnected && unexpectedExitHandler) unexpectedExitHandler();
     });
   });
 }