CRITICAL fixes:
- update_product: fetch current product first, include productId in body (was 400)
- period enum: "week"/"month" → "7d"/"30d" to match backend handler
- Token leakage: add axios response interceptor to strip Authorization from errors
- Token expiry: add 401 detection with clear user-facing message
HIGH fixes:
- create_product: handle raw Guid response (was returning "unknown")
- update_product: merge with existing values to avoid overwriting with defaults
- Startup validation: warn if API_TOKEN is not set
- Graceful shutdown: handle SIGINT/SIGTERM with server.close()
- Error handler: shared module with structured API error extraction
- Type safety: replace `any` with proper DTO interfaces across all tools
- Promise.allSettled in cost_analysis for partial failure resilience
- Timeout increased 15s → 30s for analytics queries
MEDIUM fixes:
- amount fields use .int() (inventory backend expects int, not float)
- ingredients array requires .min(1) (prevent empty recipes)
- isActive default removed (show all products by default)
- pageSize default aligned to 20 (matches backend)
- String length limits on name/description fields
- Locale-explicit formatting (vi-VN)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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