TF-79 Mark as star/unstar in email detailed view

lib/features/email/data/datasource/email_datasource.dart

@@ -29,4 +29,6 @@ abstract class EmailDataSource {
   );
 
   Future<List<EmailId>> moveToMailbox(AccountId accountId, MoveRequest moveRequest);
+
+  Future<bool> markAsImportant(AccountId accountId, EmailId emailId, ImportantAction importantAction);
 }

lib/features/email/data/datasource_impl/email_datasource_impl.dart

@@ -77,4 +77,13 @@ class EmailDataSourceImpl extends EmailDataSource {
       throw error;
     });
   }
+
+  @override
+  Future<bool> markAsImportant(AccountId accountId, EmailId emailId, ImportantAction importantAction) {
+    return Future.sync(() async {
+      return await emailAPI.markAsImportant(accountId, emailId, importantAction);
+    }).catchError((error) {
+      throw error;
+    });
+  }
 }

lib/features/email/data/network/email_api.dart

@@ -219,4 +219,31 @@ class EmailAPI {
       throw error;
     });
   }
+
+  Future<bool> markAsImportant(AccountId accountId, EmailId emailId, ImportantAction importantAction) async {
+    final setEmailMethod = SetEmailMethod(accountId)
+      ..addUpdates({
+        emailId.id: KeyWordIdentifier.emailFlagged.generateImportantActionPath(importantAction)
+      });
+
+    final requestBuilder = JmapRequestBuilder(_httpClient, ProcessingInvocation());
+
+    final setEmailInvocation = requestBuilder.invocation(setEmailMethod);
+
+    final response = await (requestBuilder
+      ..usings(setEmailMethod.requiredCapabilities))
+        .build()
+        .execute();
+
+    final setEmailResponse = response.parse<SetEmailResponse>(
+        setEmailInvocation.methodCallId,
+        SetEmailResponse.deserialize);
+
+    return Future.sync(() async {
+      final emailUpdated = setEmailResponse!.updated![emailId.id];
+      return emailUpdated == null;
+    }).catchError((error) {
+      throw error;
+    });
+  }
 }

lib/features/email/data/repository/email_repository_impl.dart

@@ -59,4 +59,9 @@ class EmailRepositoryImpl extends EmailRepository {
   Future<List<EmailId>> moveToMailbox(AccountId accountId, MoveRequest moveRequest) {
     return emailDataSource.moveToMailbox(accountId, moveRequest);
   }
+
+  @override
+  Future<bool> markAsImportant(AccountId accountId, EmailId emailId, ImportantAction importantAction) {
+    return emailDataSource.markAsImportant(accountId, emailId, importantAction);
+  }
 }