fix: replace first and last name with single field (#4915)

mobile/lib/modules/partner/views/partner_detail_page.dart

@@ -25,7 +25,7 @@ class PartnerDetailPage extends HookConsumerWidget {
 
     return Scaffold(
       appBar: AppBar(
-        title: Text("${partner.firstName} ${partner.lastName}"),
+        title: Text(partner.name),
         elevation: 0,
         centerTitle: false,
       ),
@@ -34,7 +34,7 @@ class PartnerDetailPage extends HookConsumerWidget {
             ? Padding(
                 padding: const EdgeInsets.all(16),
                 child: Text(
-                    "It seems ${partner.firstName} does not have any photos...\n"
+                    "It seems ${partner.name} does not have any photos...\n"
                     "Or your server version does not match the app version."),
               )
             : ImmichAssetGrid(

mobile/lib/modules/partner/views/partner_page.dart

@@ -41,7 +41,7 @@ class PartnerPage extends HookConsumerWidget {
                         padding: const EdgeInsets.only(right: 8),
                         child: userAvatar(context, u),
                       ),
-                      Text("${u.firstName} ${u.lastName}"),
+                      Text(u.name),
                     ],
                   ),
                 ),
@@ -71,7 +71,7 @@ class PartnerPage extends HookConsumerWidget {
           return ConfirmDialog(
             title: "partner_page_stop_sharing_title",
             content:
-                "partner_page_stop_sharing_content".tr(args: [u.firstName]),
+                "partner_page_stop_sharing_content".tr(args: [u.name]),
             onOk: () => ref.read(partnerServiceProvider).removePartner(u),
           );
         },