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/api/v1/route.js

@@ -1,32 +1 @@
-const CORS_HEADERS = {
-  "Access-Control-Allow-Origin": "*",
-  "Access-Control-Allow-Methods": "GET, OPTIONS",
-  "Access-Control-Allow-Headers": "*"
-};
-
-/**
- * Handle CORS preflight
- */
-export async function OPTIONS() {
-  return new Response(null, { headers: CORS_HEADERS });
-}
-
-/**
- * GET /v1 - Return models list (OpenAI compatible)
- */
-export async function GET() {
-  const models = [
-    { id: "claude-sonnet-4-20250514", object: "model", owned_by: "anthropic" },
-    { id: "claude-3-5-sonnet-20241022", object: "model", owned_by: "anthropic" },
-    { id: "gpt-4o", object: "model", owned_by: "openai" },
-    { id: "gemini-2.5-pro", object: "model", owned_by: "google" }
-  ];
-
-  return new Response(JSON.stringify({
-    object: "list",
-    data: models
-  }), {
-    headers: { "Content-Type": "application/json", ...CORS_HEADERS }
-  });
-}
-
+export { GET, OPTIONS } from "./models/route";