chore(mobile): search page minor enhancements (#13403)

* chore(mobile): search page retouched

* add placeholder photos

* remove unused page

* focus the search input when tapping on the search controller button

* detail fixed

* remove print statements

* disable scrolling of empty content

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

@@ -266,8 +266,8 @@ class SearchFilter {
     AssetType? mediaType,
   }) {
     return SearchFilter(
-      context: context ?? this.context,
-      filename: filename ?? this.filename,
+      context: context,
+      filename: filename,
       people: people ?? this.people,
       location: location ?? this.location,
       camera: camera ?? this.camera,