Initial commit: Maternal app with AI chat fix and onboarding improvements

- Fixed AI chat response display (response.data.data.message)
- Fixed onboarding to save children to database with validation
- Fixed AI conversation ID length (VARCHAR 30, nanoid 12)
- Added gender selection to onboarding
- All database migrations V001-V010 completed
- Backend: NestJS with Azure OpenAI integration
- Frontend: Next.js with Material-UI
- Docker: PostgreSQL, Redis, MongoDB, MinIO

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

maternal-web/next-env.d.ts

@@ -0,0 +1,5 @@
+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/basic-features/typescript for more information.