feat: redirect user dynamically based on role instead of /protected after login

shop/lib/actions/auth.ts

@@ -28,9 +28,11 @@ export async function signIn(email: string, password: string) {
 
     // Andere aktive Sitzungen beenden
     await supabase.auth.signOut({ scope: 'others' })
+
+    return { success: true, role: userData.role }
   }
 
-  return { success: true }
+  return { success: true, role: 'partner' }
 }
 
 export async function signUp(email: string, password: string) {