fix: resolve pnpm symlinks for Vercel serverless function packaging

Install external dependencies (pino, pino-pretty, @libsql/client) via npm
into api/node_modules/ during the build step. This creates real directories
(no symlinks) that Vercel can properly package for the serverless function.

- Updated build-vercel.sh to install external deps in api/node_modules/
- Updated vercel.json includeFiles to api/node_modules/**
- Added @libsql/client to esbuild EXTERNAL list
- Added api/node_modules/ and public/ to .gitignore

Agent-Logs-Url: https://github.com/objectstack-ai/framework/sessions/a2378bd5-dff3-42d5-bf08-1dff787cf351

Co-authored-by: xuyushun441-sys <255036401+xuyushun441-sys@users.noreply.github.com>

Author: Copilot

apps/server/.gitignore

@@ -1,10 +1,12 @@
 # Build artifacts
 dist/
 .turbo/
+public/
 
 # Bundled API handler (generated during Vercel build)
 api/_handler.js
 api/_handler.js.map
+api/node_modules/
 
 # Node modules
 node_modules/

apps/server/scripts/build-vercel.sh

@@ -8,11 +8,13 @@ set -euo pipefail
 #   - 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
+#   - 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
+#   4. Install external deps in api/node_modules/ (resolve pnpm symlinks)
 
 echo "[build-vercel] Starting server build..."
 
@@ -36,4 +38,26 @@ else
   echo "[build-vercel]   ⚠ Studio 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).
+# We use npm to install external packages as real files next to the handler.
+echo "[build-vercel] Installing external dependencies for serverless function..."
+cat > api/_package.json << 'DEPS'
+{
+  "private": true,
+  "dependencies": {
+    "@libsql/client": "0.14.0",
+    "pino": "10.3.1",
+    "pino-pretty": "13.1.3"
+  }
+}
+DEPS
+cd api
+mv _package.json package.json
+npm install --production --no-package-lock --ignore-scripts 2>&1 | tail -3
+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"

apps/server/scripts/bundle-api.mjs

@@ -27,6 +27,8 @@ const EXTERNAL = [
   'tedious',
   // macOS-only native file watcher
   'fsevents',
+  // LibSQL client — has native bindings, must remain external for Vercel
+  '@libsql/client',
   // Logging libraries - use dynamic require, must be external
   'pino',
   'pino-pretty',

apps/server/vercel.json

@@ -13,7 +13,7 @@
     "api/**/*.js": {
       "memory": 1024,
       "maxDuration": 60,
-      "includeFiles": "node_modules/{pino,pino-pretty}/**"
+      "includeFiles": "api/node_modules/**"
     }
   },
   "headers": [