ci: run e2e on alternate ports (3100/3101) to avoid collision with prod stack on host runner

apps/web/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "dev": "vite --port 3000",
+    "dev": "vite",
     "build": "vite build",
     "preview": "vite preview",
     "typecheck": "tsc --noEmit"

apps/web/vite.config.ts

@@ -10,14 +10,14 @@ export default defineConfig({
     },
   },
   server: {
-    port: 3000,
+    port: parseInt(process.env.VITE_PORT || "3000", 10),
     proxy: {
       "/api": {
-        target: "http://localhost:3001",
+        target: process.env.API_PROXY_TARGET || "http://localhost:3001",
         changeOrigin: true,
       },
       "/mcp": {
-        target: "http://localhost:3001",
+        target: process.env.API_PROXY_TARGET || "http://localhost:3001",
         changeOrigin: true,
       },
     },