https://github.com/StarCitizenToolBox/app/issues/1 分流下载：增加一种快速恢复卡住的下载的方法。

lib/ui/tools/downloader/downloader_dialog_ui.dart

@@ -36,13 +36,21 @@ class DownloaderDialogUI extends BaseUI<DownloaderDialogUIModel> {
               const SizedBox(width: 24),
             ],
           ),
+          if (model.isP4kDownload) ...[
+            const SizedBox(height: 24),
+            Text(
+              "提示：因网络波动，若下载进度长时间卡住或速度变慢，可尝试点击暂停下载，之后重新点击P4K分流下载。",
+              style:
+                  TextStyle(fontSize: 13, color: Colors.white.withOpacity(.7)),
+            ),
+          ],
         ],
       ),
       actions: [
         FilledButton(
             child: const Padding(
               padding: EdgeInsets.only(left: 8, right: 8, top: 2, bottom: 2),
-              child: Text("取消下载"),
+              child: Text("暂停下载"),
             ),
             onPressed: () => model.doCancel()),
       ],

lib/ui/tools/downloader/downloader_dialog_ui_model.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 
 import 'package:file_picker/file_picker.dart';
+import 'package:hive/hive.dart';
 import 'package:starcitizen_doctor/base/ui_model.dart';
 import 'package:starcitizen_doctor/common/rust/ffi.dart';
 
@@ -10,9 +11,12 @@ class DownloaderDialogUIModel extends BaseUIModel {
   final String downloadUrl;
   final bool showChangeSavePathDialog;
   final int threadCount;
+  final bool isP4kDownload;
 
   DownloaderDialogUIModel(this.fileName, this.savePath, this.downloadUrl,
-      {this.showChangeSavePathDialog = false, this.threadCount = 1});
+      {this.showChangeSavePathDialog = false,
+      this.threadCount = 1,
+      this.isP4kDownload = false});
 
   bool isInMerging = false;
 
@@ -52,8 +56,15 @@ class DownloaderDialogUIModel extends BaseUIModel {
       savePath = savePath.substring(0, savePath.length - fileName.length - 1);
     }
 
-    final downloaderSavePath = "$savePath//$fileName.downloading";
+    if (isP4kDownload) {
+      final box = await Hive.openBox("p4k_cache");
+      await box.put(
+        "last_save_dir",
+        {"save_path": savePath, "file_name": fileName},
+      );
+    }
 
+    final downloaderSavePath = "$savePath//$fileName.downloading";
     try {
       rustFii
           .startDownload(