feat: move patient info to top header with React Context

Refactored patient display from separate ClientHeader to integrated EPDHeader.

Architecture changes:
- Implemented React Context pattern for patient data sharing
- Created PatientContext with useState + setPatient for dynamic updates
- Created useSetPatient hook for patient injection from nested layouts
- Created EPDLayoutClient wrapper with PatientProvider
- Context flow: EPDLayout → EPDLayoutClient → EPDHeader (consumer)

UI improvements:
- Removed "Mini-ECD" logo from header
- Left-aligned patient info: name + status + John Doe indicator
- Added geboortedatum (dd-mm-yyyy Dutch format)
- Added BSN extraction from FHIR identifiers
- Compact layout: Patient details | Timestamp | Actions ⋮ | Search
- Actions dropdown with "Nieuwe rapportage" (expandable)

Cleanup:
- Deleted ClientHeader component (141 lines duplicate code)
- Simplified PatientLayoutClient (only useSetPatient hook)
- Single source of truth for patient display

Result: Clean context-based architecture, improved UX, -141 LOC

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

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

app/epd/layout.tsx

@@ -7,7 +7,7 @@
 
 import type { ReactNode } from 'react';
 import { EPDSidebar } from './components/epd-sidebar';
-import { EPDHeader } from './components/epd-header';
+import { EPDLayoutClient } from './components/epd-layout-client';
 import { getUser } from '@/lib/auth/server';
 
 interface EPDLayoutProps {
@@ -26,16 +26,10 @@ export default async function EPDLayout({ children }: EPDLayoutProps) {
         userName={user?.user_metadata?.full_name}
       />
 
-      {/* Main Content Area */}
-      <div className="flex-1 flex flex-col min-w-0">
-        {/* Header - Fixed 60px height */}
-        <EPDHeader />
-
-        {/* Page Content - Scrollable */}
-        <main className="flex-1 overflow-auto bg-white">
-          {children}
-        </main>
-      </div>
+      {/* Main Content Area with PatientProvider */}
+      <EPDLayoutClient>
+        {children}
+      </EPDLayoutClient>
     </div>
   );
 }