fix(objectos vercel): include @objectstack/dashboard SPA in deployment

The dashboard SPA (apps/dashboard) was never copied into Vercel's public/
directory and had no rewrite/redirect/headers entries in vercel.json, so
https://crm.objectstack.ai/_dashboard returned 404.

- build-vercel.sh: build @objectstack/dashboard and copy dist to public/_dashboard/
- vercel.json: add /_dashboard rewrite, redirect, and asset cache headers

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: hotlong

apps/objectos/scripts/build-vercel.sh

@@ -21,7 +21,7 @@ echo "[build-vercel] Starting server build..."
 # 1. Build the project with turbo (from monorepo root)
 # This builds server, studio, and the account portal.
 cd ../..
-pnpm turbo run build --filter=@objectstack/objectos --filter=@objectstack/studio --filter=@objectstack/account
+pnpm turbo run build --filter=@objectstack/objectos --filter=@objectstack/studio --filter=@objectstack/account --filter=@objectstack/dashboard
 cd apps/objectos
 
 # 1b. Compile objectstack.config.ts → dist/objectstack.json (the metadata artifact).
@@ -68,6 +68,17 @@ else
   echo "[build-vercel]   ⚠ Account dist not found (skipped)"
 fi
 
+# 3c. Copy the dashboard SPA to public/_dashboard/ — same pattern as studio.
+# Dashboard is built with base: '/_dashboard/'.
+echo "[build-vercel] Copying dashboard dist to public/_dashboard/..."
+mkdir -p public/_dashboard
+if [ -d "../dashboard/dist" ]; then
+  cp -r ../dashboard/dist/. public/_dashboard/
+  echo "[build-vercel]   ✓ Copied dashboard dist to public/_dashboard/"
+else
+  echo "[build-vercel]   ⚠ Dashboard dist not found (skipped)"
+fi
+
 # 4. Install external dependencies in api/node_modules/ (no symlinks)
 # pnpm uses symlinks in node_modules/, which Vercel's serverless function
 # packaging cannot handle ("invalid deployment package" error).

apps/objectos/vercel.json

@@ -27,16 +27,24 @@
       "headers": [
         { "key": "Cache-Control", "value": "public, max-age=31536000, immutable" }
       ]
+    },
+    {
+      "source": "/_dashboard/assets/(.*)",
+      "headers": [
+        { "key": "Cache-Control", "value": "public, max-age=31536000, immutable" }
+      ]
     }
   ],
   "redirects": [
     { "source": "/", "destination": "/_studio/", "permanent": false },
     { "source": "/_studio", "destination": "/_studio/", "permanent": false },
-    { "source": "/_account", "destination": "/_account/", "permanent": false }
+    { "source": "/_account", "destination": "/_account/", "permanent": false },
+    { "source": "/_dashboard", "destination": "/_dashboard/", "permanent": false }
   ],
   "rewrites": [
     { "source": "/api/:path*", "destination": "/api/[[...route]]" },
     { "source": "/_studio/:path*", "destination": "/_studio/index.html" },
-    { "source": "/_account/:path*", "destination": "/_account/index.html" }
+    { "source": "/_account/:path*", "destination": "/_account/index.html" },
+    { "source": "/_dashboard/:path*", "destination": "/_dashboard/index.html" }
   ]
 }