add dleete image projects

lib/features/projects/data/datasources/submissions_remote_datasource.dart

@@ -43,6 +43,14 @@ abstract class SubmissionsRemoteDataSource {
     required String projectName,
     required String filePath,
   });
+
+  /// Delete a file from a project submission
+  /// [fileId] is the file ID to delete
+  /// [projectName] is the project name (docname)
+  Future<void> deleteProjectFile({
+    required String fileId,
+    required String projectName,
+  });
 }
 
 /// Submissions Remote Data Source Implementation
@@ -303,4 +311,41 @@ class SubmissionsRemoteDataSourceImpl implements SubmissionsRemoteDataSource {
       throw Exception('Failed to upload project file: $e');
     }
   }
+
+  /// Delete a file from a project submission
+  ///
+  /// Calls: POST /api/method/frappe.desk.form.utils.remove_attach
+  /// Form-data: fid, dt, dn
+  @override
+  Future<void> deleteProjectFile({
+    required String fileId,
+    required String projectName,
+  }) async {
+    try {
+      final formData = FormData.fromMap({
+        'fid': fileId,
+        'dt': 'Architectural Project',
+        'dn': projectName,
+      });
+
+      final response = await _dioClient.post<Map<String, dynamic>>(
+        '${ApiConstants.frappeApiMethod}${ApiConstants.removeProjectFile}',
+        data: formData,
+      );
+
+      final data = response.data;
+      if (data == null) {
+        throw Exception('No data received from deleteProjectFile API');
+      }
+
+      // Check for error in response
+      if (data['exc_type'] != null || data['exception'] != null) {
+        final errorMessage =
+            data['_server_messages'] ?? data['exception'] ?? 'Unknown error';
+        throw Exception('API error: $errorMessage');
+      }
+    } catch (e) {
+      throw Exception('Failed to delete project file: $e');
+    }
+  }
 }

lib/features/projects/data/repositories/submissions_repository_impl.dart

@@ -171,4 +171,19 @@ class SubmissionsRepositoryImpl implements SubmissionsRepository {
       rethrow;
     }
   }
+
+  @override
+  Future<void> deleteProjectFile({
+    required String fileId,
+    required String projectName,
+  }) async {
+    try {
+      return await _remoteDataSource.deleteProjectFile(
+        fileId: fileId,
+        projectName: projectName,
+      );
+    } catch (e) {
+      rethrow;
+    }
+  }
 }