fix: serve studio at /_studio in Vercel deployment instead of public root

apps/server/scripts/build-vercel.sh

@@ -7,13 +7,13 @@ set -euo pipefail
 #   - api/[[...route]].js is committed to the repo (Vercel detects it pre-build)
 #   - esbuild bundles server/index.ts → api/_handler.js (self-contained bundle)
 #   - The committed .js wrapper re-exports from _handler.js at runtime
-#   - Studio SPA is built and copied to public/ for serving the UI
+#   - Studio SPA is built and copied to api/_studio/ for serving at /_studio
 #   - External dependencies installed in api/node_modules/ (no symlinks)
 #
 # Steps:
 #   1. Build the project with turbo (includes studio)
 #   2. Bundle the API serverless function (→ api/_handler.js)
-#   3. Copy studio dist files to public/ for UI serving
+#   3. Copy studio dist files to api/_studio/ for UI serving at /_studio
 #   4. Install external deps in api/node_modules/ (resolve pnpm symlinks)
 
 echo "[build-vercel] Starting server build..."
@@ -27,13 +27,13 @@ cd apps/server
 # 2. Bundle API serverless function
 node scripts/bundle-api.mjs
 
-# 3. Copy studio dist files to public/ for UI serving
-echo "[build-vercel] Copying studio dist to public/..."
-rm -rf public
-mkdir -p public
+# 3. Copy studio dist files to api/_studio/ for UI serving at /_studio
+echo "[build-vercel] Copying studio dist to api/_studio/..."
+rm -rf api/_studio
+mkdir -p api/_studio
 if [ -d "../studio/dist" ]; then
-  cp -r ../studio/dist/* public/
-  echo "[build-vercel]   ✓ Copied studio dist to public/"
+  cp -r ../studio/dist/* api/_studio/
+  echo "[build-vercel]   ✓ Copied studio dist to api/_studio/"
 else
   echo "[build-vercel]   ⚠ Studio dist not found (skipped)"
 fi
@@ -60,4 +60,4 @@ rm package.json
 cd ..
 echo "[build-vercel]   ✓ External dependencies installed in api/node_modules/"
 
-echo "[build-vercel] Done. Static files in public/, serverless function in api/[[...route]].js → api/_handler.js"
+echo "[build-vercel] Done. Studio files in api/_studio/, serverless function in api/[[...route]].js → api/_handler.js"

apps/server/server/index.ts

@@ -10,8 +10,11 @@
 import { ObjectKernel } from '@objectstack/runtime';
 import { createHonoApp } from '@objectstack/hono';
 import { getRequestListener } from '@hono/node-server';
+import { serveStatic } from '@hono/node-server/serve-static';
 import type { Hono } from 'hono';
 import stackConfig from '../objectstack.config';
+import { fileURLToPath } from 'node:url';
+import { dirname, join } from 'node:path';
 
 // ---------------------------------------------------------------------------
 // Singleton state — persists across warm Vercel invocations
@@ -69,6 +72,33 @@
 
     const kernel = await ensureKernel();
     _app = createHonoApp({ kernel, prefix: '/api/v1' });
+
+    // Serve studio at /_studio
+    const __filename = fileURLToPath(import.meta.url);
+    const __dirname = dirname(__filename);
+    const studioPath = join(__dirname, '_studio');
+
+    // Serve static files from /_studio
+    _app.get('/_studio/*', serveStatic({
+        root: __dirname,
+        rewriteRequestPath: (path) => {
+            // Rewrite /_studio/assets/x.js -> /_studio/assets/x.js
+            return path;
+        }
+    }));
+
+    // SPA fallback for studio
+    _app.get('/_studio/*', serveStatic({
+        root: __dirname,
+        rewriteRequestPath: () => '/_studio/index.html'
+    }));
+
+    // Serve studio index at /_studio root
+    _app.get('/_studio', serveStatic({
+        root: __dirname,
+        rewriteRequestPath: () => '/_studio/index.html'
+    }));
+
     return _app;
 }
 

apps/server/vercel.json

@@ -12,7 +12,7 @@
   "functions": {
     "api/**/*.js": {
       "maxDuration": 60,
-      "includeFiles": "api/node_modules/**"
+      "includeFiles": "api/{node_modules,_studio}/**"
     }
   },
   "headers": [
@@ -24,7 +24,6 @@
     }
   ],
   "rewrites": [
-    { "source": "/api/:path*", "destination": "/api/[[...route]]" },
-    { "source": "/((?!api/).*)", "destination": "/index.html" }
+    { "source": "/api/:path*", "destination": "/api/[[...route]]" }
   ]
 }