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/app/(dashboard)/dashboard/cli-tools/components/MitmServerCard.js

@@ -23,6 +23,8 @@ export default function MitmServerCard({ apiKeys, cloudEnabled, onStatusChange }
   const serverIsWindows = status?.isWin === true;
   const canRunWithoutPassword = serverIsWindows || status?.hasCachedPassword || status?.needsSudoPassword === false;
   const isAdmin = status?.isAdmin !== false;
+  // No privilege: not admin/root AND (Win OR no cached sudo password)
+  const noPrivilege = !isAdmin && (serverIsWindows || (!status?.hasCachedPassword && status?.needsSudoPassword !== false));
 
   const fetchStatus = useCallback(async () => {
     try {
@@ -217,6 +219,7 @@ export default function MitmServerCard({ apiKeys, cloudEnabled, onStatusChange }
               <button
                 onClick={() => handleAction("start")}
                 disabled={loading || (serverIsWindows && !isAdmin)}
+                title={serverIsWindows && !isAdmin ? "Administrator required" : undefined}
                 className="flex w-full items-center justify-center gap-1.5 rounded-lg border border-primary/30 bg-primary/10 px-4 py-2 text-xs font-medium text-primary transition-colors hover:bg-primary/20 disabled:opacity-50 sm:w-auto sm:py-1.5"
               >
                 <span className="material-symbols-outlined text-[16px]">play_circle</span>