feat: Add PWA support and consolidate CSS design system

- Add PWA manifest, icons (192x192, 512x512), and service worker
- Register service worker in index.html with Apple mobile web app support
- Consolidate CSS variables and design tokens documentation
- Update PrimeVue overrides for consistent theming
- Refactor data-entry components to use shared CSS patterns
- Add frontend-style-auditor agent for style consistency checks
- Minor OCR validation and job worker improvements
- Update start-prod.sh configuration

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/modules/reports/views/InvoicesView.vue

@@ -878,23 +878,7 @@ watch(
   display: block;
 }
 
-/* Enhanced striped rows with better contrast - same as Trial Balance */
-.table-card :deep(.p-datatable .p-datatable-tbody > tr) {
-  transition: background-color 0.2s ease;
-}
-
-.table-card :deep(.p-datatable .p-datatable-tbody > tr:nth-child(odd)) {
-  background-color: #ffffff;
-}
-
-.table-card :deep(.p-datatable .p-datatable-tbody > tr:nth-child(even)) {
-  background-color: #f8f9fa;
-}
-
-.table-card :deep(.p-datatable .p-datatable-tbody > tr:hover) {
-  background-color: #e3f2fd !important;
-  cursor: pointer;
-}
+/* Enhanced striped rows - moved to vendor/primevue-overrides.css with design tokens */
 
 /* Responsive design */
 @media (max-width: 768px) {