Add v2 pages to Vite build and Vercel routing

vercel.json

@@ -42,6 +42,18 @@
       "src": "/ux-test",
       "dest": "/ux-test.html"
     },
+    {
+      "src": "/v2",
+      "dest": "/v2.html"
+    },
+    {
+      "src": "/v2-test",
+      "dest": "/v2-test.html"
+    },
+    {
+      "src": "/v2-diagnostic",
+      "dest": "/v2-diagnostic.html"
+    },
     { "handle": "filesystem" },
     {
       "src": "/(.*)",

vite.config.ts

@@ -17,6 +17,10 @@ export default defineConfig({
         // Sharing trial pages
         play: resolve(__dirname, 'play.html'),
         ux_test: resolve(__dirname, 'ux-test.html'),
+        // V2 Game Boy Sound Engine (isolated from v1)
+        v2: resolve(__dirname, 'v2.html'),
+        v2_test: resolve(__dirname, 'v2-test.html'),
+        v2_diagnostic: resolve(__dirname, 'v2-diagnostic.html'),
       },
     },
   },