Enhance migration templates with critical omission prevention

Add comprehensive guidance to prevent common migration oversights:
- Remove unused notification imports
- Replace hardcoded timeout values with constants
- Remove legacy wrapper functions
- Extract long class attributes to computed properties
- Replace literal strings with constants

Based on lessons learned from ContactQRScanShowView.vue migration.
Includes validation commands and specific examples for each pattern.

doc/migration-progress-tracker.md

@@ -18,7 +18,7 @@ This document tracks the progress of the 2-day sprint to complete PlatformServic
 
 **Last Updated**: $(date)
 **Current Phase**: Day 1 - PlatformServiceMixin Completion
-**Overall Progress**: 0% (0/52 files migrated)
+**Overall Progress**: 11.5% (6/52 files migrated)
 
 ---
 
@@ -147,7 +147,7 @@ export default class ComponentName extends Vue {
 ## 📋 **File Migration Checklist**
 
 ### **Views (25 files) - Priority 1**
-**Progress**: 0/25 (0%)
+**Progress**: 3/25 (12%)
 
 - [ ] QuickActionBvcEndView.vue
 - [ ] ProjectsView.vue
@@ -163,7 +163,7 @@ export default class ComponentName extends Vue {
 - [ ] OfferDetailsView.vue
 - [ ] ContactEditView.vue
 - [ ] SharedPhotoView.vue
-- [ ] ContactQRScanShowView.vue
+- [x] ContactQRScanShowView.vue ✅ **MIGRATED & HUMAN TESTED**
 - [ ] ContactGiftingView.vue
 - [x] DiscoverView.vue ✅ **MIGRATED & HUMAN TESTED**
 - [ ] ImportAccountView.vue