dynamite,nextcloud: Fix setting user agent

packages/dynamite/lib/src/openapi_builder.dart

@@ -395,6 +395,12 @@ class OpenAPIBuilder implements Builder {
                               ..type = refer('Map<String, String>?')
                               ..named = true,
                           ),
+                          Parameter(
+                            (final b) => b
+                              ..name = 'userAgent'
+                              ..type = refer('String?')
+                              ..named = true,
+                          ),
                           Parameter(
                             (final b) => b
                               ..name = 'httpClient'
@@ -427,7 +433,7 @@ class OpenAPIBuilder implements Builder {
                           },
                         ''' : ''}
                         };
-                        this.httpClient = httpClient ?? HttpClient();
+                        this.httpClient = (httpClient ?? HttpClient())..userAgent = userAgent;
                       '''),
                     ),
                   )

packages/nextcloud/lib/src/client.dart

@@ -16,9 +16,9 @@ class NextcloudClient extends Client {
             'OCS-APIRequest': 'true',
             'Accept': 'application/json',
             'Accept-Language': language,
-            'User-Agent': userAgentOverride ?? appType.userAgent,
           }..removeWhere((final _, final value) => value == null))
               .cast<String, String>(),
+          userAgent: userAgentOverride ?? appType.userAgent,
           authentication: username != null && password != null
               ? HttpBasicAuthentication(
                   username: username,

packages/nextcloud/lib/src/nextcloud.openapi.dart

@@ -93,6 +93,7 @@ class Client {
   Client(
     this.baseURL, {
     Map<String, String>? baseHeaders,
+    String? userAgent,
     HttpClient? httpClient,
     this.cookieJar,
     this.authentication,
@@ -105,7 +106,7 @@ class Client {
         ...authentication!.headers,
       },
     };
-    this.httpClient = httpClient ?? HttpClient();
+    this.httpClient = (httpClient ?? HttpClient())..userAgent = userAgent;
   }
 
   final String baseURL;