canina/.ai_agency/specs/reviews/code_health_review.md

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# 🔍 Code Health Audit Review (01_auditor)
## Executive Summary
- **Overall Project Architecture**: Monorepo structure containing NestJS backend (`/backend`), Next.js customer frontend (`/frontend/application`), and React + Vite admin panel (`/frontend/admin-panel`).
- **Prisma Schema**: High quality schema with indexed lookup fields (`categorySlug`, `suitableFor`, `artNo`, `slug`), supporting dynamic CMS elements (HeroBanners, VetTestimonials, SmartAdvisorRules, UiText, ScientificTerms).
- **TypeScript & Type Safety**: Good type enforcement across NestJS backend and Next.js frontend, but require strict DTO validation across all public REST endpoints and type-safe API client interfaces between Next.js/Vite apps and NestJS backend.
## Key Findings
1. **Backend Validation & Exception Handling**:
- `main.ts` requires global `ValidationPipe` with `whitelist: true` and `forbidNonWhitelisted: true`.
- Standardized `HttpExceptionFilter` needs to be globally registered to ensure predictable error payloads across both customer frontend and admin panel.
2. **Data Consistency & Seeding**:
- Real products and data extracted from `canina.md` and `canina.pdf` need full database synchronization via `prisma/seed.ts`.
- Complete coverage for all 3 user segments: Pet Owners (smart advisor rules, educational terms), Vet Prescribed (artNo, barcode, precise dosage), B2B Wholesale (wholesale pricing, bulk packaging, tier pricing).
3. **Frontend Application & Admin Panel Synchronization**:
- Customer app dynamic components (Hero carousel, Vet testimonials, B2B wholesale portal, Pet health advisor, Scientific wiki, Dynamic texts) must fetch live backend API endpoints instead of static fallback definitions.
- Admin panel must provide CRUD management for all dynamic models: HeroBanners, VetTestimonials, SmartAdvisorRules, ScientificTerms, UiTexts, Products, Categories, Orders, B2B Approval requests.
## Recommendations
- Enforce strict NestJS architecture with DTO validation and Role Guards.
- Ensure all static UI text is loaded from `UiText` table via backend API.
- Ensure 100% test coverage for critical business paths (Auth, B2B pricing, Cart calculation).