refactor: DCM - const border radius, constructor & switch expressions (#19515)

* enable border radius, switch exp, const constructor

* regenerate provider

* more formatting

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/pages/backup/backup_album_selection.page.dart

@@ -246,8 +246,10 @@ class BackupAlbumSelectionPage extends HookConsumerWidget {
                         context: context,
                         builder: (BuildContext context) {
                           return AlertDialog(
-                            shape: RoundedRectangleBorder(
-                              borderRadius: BorderRadius.circular(10),
+                            shape: const RoundedRectangleBorder(
+                              borderRadius: BorderRadius.all(
+                                Radius.circular(10),
+                              ),
                             ),
                             elevation: 5,
                             title: Text(

mobile/lib/pages/backup/backup_controller.page.dart

@@ -147,7 +147,9 @@ class BackupControllerPage extends HookConsumerWidget {
         padding: const EdgeInsets.only(top: 8.0),
         child: Card(
           shape: RoundedRectangleBorder(
-            borderRadius: BorderRadius.circular(20),
+            borderRadius: const BorderRadius.all(
+              Radius.circular(20),
+            ),
             side: BorderSide(
               color: context.colorScheme.outlineVariant,
               width: 1,

mobile/lib/pages/backup/failed_backup_status.page.dart

@@ -42,9 +42,11 @@ class FailedBackupStatusPage extends HookConsumerWidget {
               vertical: 4,
             ),
             child: Card(
-              shape: RoundedRectangleBorder(
-                borderRadius: BorderRadius.circular(15), // if you need this
-                side: const BorderSide(
+              shape: const RoundedRectangleBorder(
+                borderRadius: BorderRadius.all(
+                  Radius.circular(15), // if you need this
+                ),
+                side: BorderSide(
                   color: Colors.black12,
                   width: 1,
                 ),