chore: switch API host from api-dev.copilothub.ai to api.multica.ai

Update all backend API base URLs to use the production multica.ai domain.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/desktop/src/renderer/src/service/request.ts

@@ -1,7 +1,7 @@
 import { useAuthStore } from '../stores/auth'
 
 // Backend API host — change this when switching environments
-const API_HOST = 'https://api-dev.copilothub.ai'
+const API_HOST = 'https://api.multica.ai'
 
 /**
  * Fetch request wrapper for desktop app.

apps/web/next.config.ts

@@ -5,7 +5,7 @@ const nextConfig: NextConfig = {
   rewrites: async () => [
     {
       source: "/api/:path*",
-      destination: `${process.env.API_URL || "https://api-dev.copilothub.ai"}/api/:path*`,
+      destination: `${process.env.API_URL || "https://api.multica.ai"}/api/:path*`,
     },
   ],
   headers: async () => [

packages/core/src/hub/api-client.ts

@@ -1,6 +1,6 @@
 import { getLocalAuth } from "./auth-store.js";
 
-export const API_BASE_URL = "https://api-dev.copilothub.ai";
+export const API_BASE_URL = "https://api.multica.ai";
 
 /**
  * Return auth headers for the proxy API.