Integrate Mindbody app into Next.js migration

[vespo92]

Transform the MCP server into a complete Next.js 14+ application with:

• Prisma schema with 30+ models and proper foreign key relationships
• Unified MindbodyService class with 50+ strongly-typed methods
• tRPC routers for type-safe API access (site, staff, client, class, appointment, enrollment, sales)
• React Query hooks for all data fetching operations
• Data sync layer between Mindbody API and local PostgreSQL database
• Example pages: Dashboard, Clients, Classes, Staff with full CRUD operations
• Complete TypeScript type definitions for all Mindbody entities

Architecture:

• /prisma/schema.prisma - Database models with relationships
• /src/lib/mindbody/ - Core service layer (client, service, types)
• /src/lib/sync/ - Background sync service
• /src/server/routers/ - tRPC routers by domain
• /src/hooks/useMindbody.ts - React hooks
• /src/app/ - Next.js App Router pages

Pull Request

Description

Brief description of what this PR does.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Changes Made

Testing

• Tested locally with bun run test:tool
• Tested with Claude Desktop
• Added/updated tests as needed
• All tests passing

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

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Additional Notes

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