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

* enable border radius, switch exp, const constructor

* regenerate provider

* more formatting

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

mobile/lib/models/search/search_curated_content.model.dart

@@ -14,7 +14,7 @@ class SearchCuratedContent {
   /// The id to lookup the asset from the server
   final String id;
 
-  SearchCuratedContent({
+  const SearchCuratedContent({
     required this.label,
     required this.id,
     this.subtitle,

mobile/lib/models/search/search_result.model.dart

@@ -6,7 +6,7 @@ class SearchResult {
   final List<Asset> assets;
   final int? nextPage;
 
-  SearchResult({
+  const SearchResult({
     required this.assets,
     this.nextPage,
   });

mobile/lib/models/search/search_result_page_state.model.dart

@@ -8,7 +8,7 @@ class SearchResultPageState {
   final bool isSmart;
   final List<Asset> searchResult;
 
-  SearchResultPageState({
+  const SearchResultPageState({
     required this.isLoading,
     required this.isSuccess,
     required this.isError,