修复任务提交与弹窗交互问题

suixinkan/UI/MaterialManagement/MaterialFormViewController.swift

@@ -267,10 +267,26 @@ final class MaterialFormViewController: BaseViewController {
         sheet.addAction(UIAlertAction(title: "从相册选择", style: .default) { [weak self] _ in
             self?.presentPhotoPicker()
         })
+        if target == .material {
+            sheet.addAction(UIAlertAction(title: "从云盘导入", style: .default) { [weak self] _ in
+                self?.openCloudPicker()
+            })
+        }
         sheet.addAction(UIAlertAction(title: "取消", style: .cancel))
         present(sheet, animated: true)
     }
 
+    private func openCloudPicker() {
+        let controller = CloudStoragePickForTaskViewController(
+            importedFileIDs: viewModel.importedCloudFileIDs,
+            allowedFileType: viewModel.mediaType.cloudFileType
+        )
+        controller.onConfirmed = { [weak self] files in
+            self?.viewModel.addCloudMediaFiles(files)
+        }
+        navigationController?.pushViewController(controller, animated: true)
+    }
+
     private func presentPhotoPicker() {
         var configuration = PHPickerConfiguration(photoLibrary: .shared())
         if pickTarget == .cover {