fix(ci): run codegen/build explicitly for vercel deploys under pnpm 11

pnpm 11 no longer fires the install-time root `prepare` (build-fast) on
Vercel, so each deploy hit a missing artifact. Move the build
prerequisites into explicit `pre<script>` hooks instead of relying on the
lifecycle:

- website: prebuild now runs `panda codegen` (generates styled-system)
- playground: add prebuild to build packages + db:generate + css:codegen
- studio: add predeploy-studio to build packages so cli/dist exists before
  `node ../cli/bin.js codegen`

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: segunadebayo

package.json

@@ -27,6 +27,7 @@
     "release-dev": "changeset version --snapshot dev && changeset publish --tag dev",
     "prepare-studio": "pnpm --filter=./packages/studio codegen",
     "build-studio": "pnpm --filter=./sandbox/vite-ts exec pnpm panda studio --build",
+    "predeploy-studio": "pnpm build-fast",
     "deploy-studio": "pnpm prepare-studio && pnpm build-studio",
     "serve-studio": "npx serve ./sandbox/vite-ts/styled-system-studio",
     "website": "pnpm --filter=./website",

playground/package.json

@@ -6,6 +6,7 @@
     "css:codegen": "pnpm panda codegen --silent",
     "types:codegen": "tsx scripts/bundle-types.mts",
     "prepare": "pnpm db:generate && pnpm css:codegen",
+    "prebuild": "pnpm --filter=../packages/** build && pnpm db:generate && pnpm css:codegen",
     "build": "pnpm types:codegen && next build",
     "start": "next start",
     "lint": "eslint .",

website/package.json

@@ -11,7 +11,7 @@
     "build:content": "velite --clean",
     "build:next": "next build",
     "build": "run-s build:*",
-    "prebuild": "pnpm --filter=../packages/** build",
+    "prebuild": "pnpm --filter=../packages/** build && panda codegen",
     "lint": "eslint . --max-warnings 0",
     "start": "next start"
   },