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- Remove outdated push notifications documentation files
- Remove outdated PWA implementation plan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>

pre-deploy-check.sh

@@ -0,0 +1,146 @@
+#!/bin/bash
+set -e
+
+echo "======================================"
+echo "🔍 Pre-Deployment Checks"
+echo "======================================"
+
+ERRORS=0
+
+# Check 1: Frontend build
+echo ""
+echo "1️⃣  Checking frontend build..."
+cd /root/maternal-app/maternal-web
+if npm run build > /tmp/frontend-build.log 2>&1; then
+  echo "✅ Frontend build successful"
+else
+  echo "❌ Frontend build failed"
+  echo "See /tmp/frontend-build.log for details"
+  ERRORS=$((ERRORS + 1))
+fi
+
+# Check 2: Backend build
+echo ""
+echo "2️⃣  Checking backend build..."
+cd /root/maternal-app/maternal-app/maternal-app-backend
+if npm run build > /tmp/backend-build.log 2>&1; then
+  echo "✅ Backend build successful"
+else
+  echo "❌ Backend build failed"
+  echo "See /tmp/backend-build.log for details"
+  tail -20 /tmp/backend-build.log
+  ERRORS=$((ERRORS + 1))
+fi
+
+# Check 2.5: Admin Panel build
+echo ""
+echo "2️⃣.5 Checking admin panel build..."
+cd /root/maternal-app/parentflow-admin
+if npm run build > /tmp/admin-build.log 2>&1; then
+  echo "✅ Admin panel build successful"
+else
+  echo "❌ Admin panel build failed"
+  echo "See /tmp/admin-build.log for details"
+  tail -20 /tmp/admin-build.log
+  ERRORS=$((ERRORS + 1))
+fi
+
+# Check 3: Uncommitted changes
+echo ""
+echo "3️⃣  Checking for uncommitted changes..."
+cd /root/maternal-app
+if [ -z "$(git status --porcelain)" ]; then
+  echo "✅ No uncommitted changes"
+else
+  echo "⚠️  Uncommitted changes detected:"
+  git status --short
+  echo ""
+  echo "You may want to commit these before deploying"
+fi
+
+# Check 4: Current branch
+echo ""
+echo "4️⃣  Checking current branch..."
+BRANCH=$(git branch --show-current)
+if [ "$BRANCH" = "main" ] || [ "$BRANCH" = "master" ]; then
+  echo "✅ On branch: $BRANCH"
+else
+  echo "⚠️  On branch: $BRANCH (not main/master)"
+fi
+
+# Check 5: Remote sync
+echo ""
+echo "5️⃣  Checking if local is ahead of remote..."
+git fetch origin --quiet
+LOCAL=$(git rev-parse @)
+REMOTE=$(git rev-parse @{u})
+if [ "$LOCAL" = "$REMOTE" ]; then
+  echo "✅ Local and remote are in sync"
+elif [ "$LOCAL" != "$REMOTE" ]; then
+  AHEAD=$(git rev-list --count @{u}..HEAD)
+  if [ "$AHEAD" -gt 0 ]; then
+    echo "⚠️  Local is $AHEAD commit(s) ahead of remote (need to push)"
+  else
+    echo "⚠️  Local is behind remote (need to pull)"
+  fi
+fi
+
+# Check 6: Pending migrations
+echo ""
+echo "6️⃣  Checking for pending migrations..."
+cd /root/maternal-app/maternal-app/maternal-app-backend
+MIGRATIONS=$(find src/database/migrations -name "*.ts" 2>/dev/null | wc -l)
+echo "Found $MIGRATIONS migration files"
+
+# Check 7: Environment files
+echo ""
+echo "7️⃣  Checking environment files..."
+if [ -f "/root/maternal-app/maternal-web/.env.local" ]; then
+  echo "✅ Frontend .env.local exists"
+else
+  echo "⚠️  Frontend .env.local not found"
+fi
+
+if [ -f "/root/maternal-app/maternal-app/maternal-app-backend/.env" ]; then
+  echo "✅ Backend .env exists"
+else
+  echo "⚠️  Backend .env not found"
+fi
+
+if [ -f "/root/maternal-app/parentflow-admin/.env.local" ]; then
+  echo "✅ Admin panel .env.local exists"
+else
+  echo "⚠️  Admin panel .env.local not found"
+fi
+
+# Summary
+echo ""
+echo "======================================"
+if [ $ERRORS -eq 0 ]; then
+  echo "✅ All critical checks passed! Ready to deploy."
+  echo ""
+  echo "📋 Next steps:"
+  echo "  1. Review any warnings above"
+  echo "  2. git add . (if uncommitted changes)"
+  echo "  3. git commit -m 'your message'"
+  echo "  4. git push origin main"
+  echo "  5. SSH to production server"
+  echo "  6. Run: /var/www/maternal-app/deploy.sh"
+  echo ""
+else
+  echo "❌ $ERRORS critical check(s) failed!"
+  echo ""
+  echo "Fix the following before deploying:"
+  if [ -f /tmp/frontend-build.log ]; then
+    echo "  - Frontend build errors"
+  fi
+  if [ -f /tmp/backend-build.log ]; then
+    echo "  - Backend build errors"
+  fi
+  if [ -f /tmp/admin-build.log ]; then
+    echo "  - Admin panel build errors"
+  fi
+  echo ""
+  exit 1
+fi
+echo "======================================"