fix: resolve admin white screen via static ChatWindowProvider import

- Statically declare ChatWindowProvider in payload.config.ts admin.components.providers
- Regenerate importMap.js with correct component mappings
- Update Dockerfile to support _at-mintel monorepo sync for local builds
- Add .gitignore entries for manual build artifacts
- Update blocks and collections (payload-ai integration updates)
- Sync pnpm-lock.yaml

apps/web/next.config.mjs

@@ -10,11 +10,6 @@ const dirname = path.dirname(filename);
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   serverExternalPackages: [
-    '@mintel/content-engine',
-    '@mintel/concept-engine',
-    '@mintel/estimation-engine',
-    '@mintel/payload-ai',
-    '@mintel/pdf',
     'canvas',
     'sharp',
     'puppeteer',