feat: 更新拖放功能，重构状态管理，优化工作流组件，添加节点和边的确认删除功能

src/components/workflow/DropzoneBackground.vue

@@ -5,7 +5,6 @@ import { Background } from '@vue-flow/background'
 <template>
   <div class="dropzone-background">
     <Background :size="2" :gap="20" pattern-color="#BDBDBD" />
-
     <div class="overlay">
       <slot />
     </div>

src/components/workflow/Sidebar.vue

@@ -2,20 +2,73 @@
 import useDragAndDrop from '@core/utils/workflow'
 
 const { onDragStart } = useDragAndDrop()
+
+// 组件列表
+const actions = [
+  {
+    type: 'AddDownloadAction',
+    label: '添加下载资源',
+  },
+  {
+    type: 'AddSubscribeAction',
+    label: '添加订阅',
+  },
+  {
+    type: 'FetchDownloadsAction',
+    label: '获取下载任务',
+  },
+  {
+    type: 'FetchMediasAction',
+    label: '获取媒体数据',
+  },
+  {
+    type: 'FetchRssAction',
+    label: '获取RSS数据',
+  },
+  {
+    type: 'FetchTorrentsAction',
+    label: '搜索站点资源',
+  },
+  {
+    type: 'FilterMediasAction',
+    label: '过滤媒体数据',
+  },
+  {
+    type: 'FilterTorrentsAction',
+    label: '过滤资源数据',
+  },
+  {
+    type: 'ScrapeFileAction',
+    label: '刮削文件',
+  },
+  {
+    type: 'SendEventAction',
+    label: '发送事件',
+  },
+  {
+    type: 'SendMessageAction',
+    label: '发送消息',
+  },
+  {
+    type: 'TransferFileAction',
+    label: '整理文件',
+  },
+]
 </script>
 
 <template>
   <aside>
-    <div class="description">You can drag these nodes to the pane.</div>
+    <div class="mb-3"><VLabel>可选动作组件：</VLabel></div>
 
     <div class="nodes">
-      <div class="vue-flow__node-input" :draggable="true" @dragstart="onDragStart($event, 'input')">Input Node</div>
-
-      <div class="vue-flow__node-default" :draggable="true" @dragstart="onDragStart($event, 'default')">
-        Default Node
+      <div
+        class="vue-flow__node-default"
+        v-for="action in actions"
+        :draggable="true"
+        @dragstart="onDragStart($event, action)"
+      >
+        {{ action['label'] }}
       </div>
-
-      <div class="vue-flow__node-output" :draggable="true" @dragstart="onDragStart($event, 'output')">Output Node</div>
     </div>
   </aside>
 </template>