feat: Implement comprehensive error handling and production deployment pipeline

## Error Handling System
- Add centralized error handling utilities (errorHandler.ts)
- Create reusable error components (ErrorMessage, ErrorToast)
- Implement multilingual error support (preserves backend error messages in 5 languages)
- Update 15+ forms and components with consistent error handling
  - Auth forms: login, register, forgot-password
  - Family management: family page, join family dialog
  - Child management: child dialog
  - All tracking forms: feeding, sleep, diaper, medicine, growth, activity

## Production Build Fixes
- Fix backend TypeScript errors: InviteCode.uses → InviteCode.useCount (5 instances)
- Remove non-existent savedFamily variable from registration response
- Fix admin panel TypeScript errors: SimpleMDE toolbar type, PieChart label type

## User Experience Improvements
- Auto-uppercase invite code and share code inputs
- Visual feedback for case conversion with helper text
- Improved form validation with error codes

## CI/CD Pipeline
- Create comprehensive production deployment checklist (PRODUCTION_DEPLOYMENT_CHECKLIST.md)
- Add automated pre-deployment check script (pre-deploy-check.sh)
  - Validates frontend, backend, and admin panel builds
  - Checks git status, branch, and sync state
  - Verifies environment files and migrations
- Add quick start deployment guide (DEPLOYMENT_QUICK_START.md)
- Add production deployment automation template (deploy-production.sh)

## Cleanup
- Remove outdated push notifications documentation files
- Remove outdated PWA implementation plan

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

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

maternal-web/lib/api/client.ts

@@ -1,5 +1,6 @@
 import axios from 'axios';
 import { tokenStorage } from '@/lib/utils/tokenStorage';
+import { logError } from '@/lib/utils/errorHandler';
 
 const API_BASE_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:3020';
 
@@ -25,12 +26,15 @@ apiClient.interceptors.request.use(
   }
 );
 
-// Response interceptor to handle token refresh
+// Response interceptor to handle token refresh and error logging
 apiClient.interceptors.response.use(
   (response) => response,
   async (error) => {
     const originalRequest = error.config;
 
+    // Log all API errors for debugging and error tracking
+    logError(error, `API ${originalRequest?.method?.toUpperCase()} ${originalRequest?.url}`);
+
     // Only handle token refresh on client side
     if (typeof window === 'undefined') {
       return Promise.reject(error);