chore(strip): verwijder /epd/clients redirect-laag

Alle verwijzingen (middleware, login, auth-callback, set-password,
Cortex context-bar) wijzen nu rechtstreeks naar /epd/patients; de
backwards-compat redirects zijn daarmee overbodig.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

middleware.ts

@@ -84,7 +84,7 @@ export async function middleware(request: NextRequest) {
   // Helper: get preferred interface redirect path
   const getPreferredPath = () => {
     const preference = user?.user_metadata?.preferred_interface
-    return preference === 'cortex' ? '/epd/cortex' : '/epd/clients'
+    return preference === 'cortex' ? '/epd/cortex' : '/epd/patients'
   }
 
   // Redirect to preferred interface if authenticated and trying to access login