fix: make patient detail page full-width to match tauri FilesServices

Removed the maxWidth:1060 centered wrapper on PatientDetailPage that
boxed the page; tauri's FilesServices renders full-width in a plain Box.
Added a regression test asserting the root wrapper has no max-width cap.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

assets/admin/pages/PatientDetailPage.tsx

@@ -115,7 +115,7 @@ export default function PatientDetailPage() {
   });
 
   return (
-    <div className="fade-in" style={{ maxWidth: 1060, margin: '0 auto' }}>
+    <div className="fade-in">
       {/* breadcrumb + patient banner (tauri BreadcrumbHeader + FileServicesHeader) */}
       <Breadcrumb name={record?.user_name || 'پرونده'} backTo="/admin/patients" />
       <PatientCaseBanner