feat(mobile): use cached asset info if unchanged instead of downloading all assets (#1017)

* feat(mobile): use cached asset info if unchanged instead of downloading all assets

This adds an HTTP ETag to the getAllAssets endpoint and client-side support in the app.
If locally cache content is identical to the content on the server, the potentially large list of all assets does not need to be downloaded.

* use ts import instead of require

mobile/openapi/lib/api/asset_api.dart

@@ -297,7 +297,12 @@ class AssetApi {
   /// Get all AssetEntity belong to the user
   ///
   /// Note: This method returns the HTTP [Response].
-  Future<Response> getAllAssetsWithHttpInfo() async {
+  ///
+  /// Parameters:
+  ///
+  /// * [String] ifNoneMatch:
+  ///   ETag of data already cached on the client
+  Future<Response> getAllAssetsWithHttpInfo({ String? ifNoneMatch, }) async {
     // ignore: prefer_const_declarations
     final path = r'/asset';
 
@@ -308,6 +313,10 @@ class AssetApi {
     final headerParams = <String, String>{};
     final formParams = <String, String>{};
 
+    if (ifNoneMatch != null) {
+      headerParams[r'if-none-match'] = parameterToString(ifNoneMatch);
+    }
+
     const contentTypes = <String>[];
 
 
@@ -325,8 +334,13 @@ class AssetApi {
   /// 
   ///
   /// Get all AssetEntity belong to the user
-  Future<List<AssetResponseDto>?> getAllAssets() async {
-    final response = await getAllAssetsWithHttpInfo();
+  ///
+  /// Parameters:
+  ///
+  /// * [String] ifNoneMatch:
+  ///   ETag of data already cached on the client
+  Future<List<AssetResponseDto>?> getAllAssets({ String? ifNoneMatch, }) async {
+    final response = await getAllAssetsWithHttpInfo( ifNoneMatch: ifNoneMatch, );
     if (response.statusCode >= HttpStatus.badRequest) {
       throw ApiException(response.statusCode, await _decodeBodyBytes(response));
     }