feat: support download client priority

ui/lib/providers/settings.dart

@@ -243,6 +243,7 @@ class DownloadClient {
   String? password;
   bool? removeCompletedDownloads;
   bool? removeFailedDownloads;
+  int? priority;
   DownloadClient(
       {this.id,
       this.enable,
@@ -252,6 +253,7 @@ class DownloadClient {
       this.user,
       this.password,
       this.removeCompletedDownloads = true,
+      this.priority = 1,
       this.removeFailedDownloads = true});
 
   DownloadClient.fromJson(Map<String, dynamic> json) {
@@ -262,6 +264,7 @@ class DownloadClient {
     url = json['url'];
     user = json['user'];
     password = json['password'];
+    priority = json["priority1"];
     removeCompletedDownloads = json["remove_completed_downloads"] ?? false;
     removeFailedDownloads = json["remove_failed_downloads"] ?? false;
   }
@@ -275,6 +278,7 @@ class DownloadClient {
     data['url'] = url;
     data['user'] = user;
     data['password'] = password;
+    data["priority"] = priority;
     data["remove_completed_downloads"] = removeCompletedDownloads;
     data["remove_failed_downloads"] = removeFailedDownloads;
     return data;

ui/lib/settings/downloader.dart

@@ -56,6 +56,7 @@ class _DownloaderState extends ConsumerState<DownloaderSettings> {
             "impl": client.implementation,
             "remove_completed_downloads": client.removeCompletedDownloads,
             "remove_failed_downloads": client.removeFailedDownloads,
+            "priority": client.priority.toString(),
           },
           child: Column(
             children: [
@@ -86,6 +87,11 @@ class _DownloaderState extends ConsumerState<DownloaderSettings> {
                 autovalidateMode: AutovalidateMode.onUserInteraction,
                 validator: FormBuilderValidators.required(),
               ),
+              FormBuilderTextField(
+                  name: "priority",
+                  decoration: const InputDecoration(labelText: "优先级", helperText: "1-50, 1最高优先级，50最低优先级"),
+                  validator: FormBuilderValidators.integer(),
+                  autovalidateMode: AutovalidateMode.onUserInteraction),
               FormBuilderSwitch(
                   name: "remove_completed_downloads",
                   title: const Text("任务完成后删除")),
@@ -148,6 +154,7 @@ class _DownloaderState extends ConsumerState<DownloaderSettings> {
                 url: values["url"],
                 user: _enableAuth ? values["user"] : null,
                 password: _enableAuth ? values["password"] : null,
+                priority: int.parse(values["priority"]),
                 removeCompletedDownloads: values["remove_completed_downloads"],
                 removeFailedDownloads: values["remove_failed_downloads"]));
       } else {