feat: mobile UX improvements across dashboard (#9)

* feat: mobile UX improvements across dashboard pages

- Responsive layouts with stacked mobile forms and grid desktop views
- Safe area handling (viewportFit cover, bottom nav insets, main padding)
- Touch-friendly dialogs, tabs, and page headers
- Mobile nav drawer open/close animation
- Dashboard layout parallel Supabase queries
- SIE parser: handle quoted VER/TRANS fields
- Skip account override for template-based transaction booking

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: address PR review feedback from Greptile

- Fix nav drawer close timer race condition with useRef + clearTimeout
- Show locked VAT rate as read-only label on mobile instead of hiding it
- Remove dead bottom-16 class overridden by inline style

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

components/extensions/shared/MockDataImportDialog.tsx

@@ -229,7 +229,7 @@ export default function MockDataImportDialog<T>({
 
   return (
     <Dialog open={open} onOpenChange={handleOpenChange}>
-      <DialogContent className="max-w-2xl max-h-[85vh] overflow-y-auto">
+      <DialogContent className="sm:max-w-2xl max-h-[95dvh] sm:max-h-[85vh] overflow-y-auto">
         <DialogHeader>
           <DialogTitle>
             {step === 'upload' && 'Importera testdata'}