refactor: replace fake progress bar with spinner for task creation

移除批量下载时模拟的进度条，改用转圈加载动画。
模拟进度条没有实际意义，单事务创建任务速度已大幅提升。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/work/view/parseModal.ts

@@ -49,12 +49,7 @@ export class ParseModalComp implements VanComponent {
         formatIndex: State<number>
     }[]> = van.state([])
 
-    /** 该属性用于在点击”开始下载”按钮后使按钮变为禁用状态，防止多次点击 */
-    downloadBtnDisabled = van.state(false)
-
-    /** 下载进度 */
-    downloadProgress = van.state(0)
-    downloadTotal = van.state(0)
+    /** 下载状态 */
     isDownloading = van.state(false)
 
     /** 下载类型：audio 仅音频，video 仅视频，merge 音视频合并 */
@@ -79,6 +74,16 @@ export class ParseModalComp implements VanComponent {
                     ),
                     // 进度条固定在头部下方
                     this.StickyProgress(),
+                    // 下载时的加载动画
+                    div({
+                        class: 'text-center p-5',
+                        hidden: () => !this.isDownloading.val
+                    },
+                        div({ class: 'spinner-border text-primary', role: 'status' },
+                            span({ class: 'visually-hidden' }, '加载中...')
+                        ),
+                        div({ class: 'mt-3' }, '正在创建下载任务...')
+                    ),
                     div({ class: `modal-body vstack gap-3`, tabIndex: -1, style: 'outline: none;' },
                         div({ class: 'vstack gap-2', hidden: () => this.errorList.val.length == 0 || !allFinish.val || this.isDownloading.val },
                             div({ class: 'text-danger' }, () => `以下 ${this.errorList.val.length} 个视频解析失败`),
@@ -138,10 +143,7 @@ export class ParseModalComp implements VanComponent {
     download() {
         const selectedPlayInfos = this.allPlayInfo.val.filter(info => info.selected.val)
         const workRoute = this.option.workRoute
-        this.downloadBtnDisabled.val = true
         this.isDownloading.val = true
-        this.downloadProgress.val = 0
-        this.downloadTotal.val = selectedPlayInfos.length
 
         // 需要传递给服务器，需要创建下载任务的数据列表
         createTask(selectedPlayInfos.map((info, index) => {
@@ -185,27 +187,12 @@ export class ParseModalComp implements VanComponent {
                 ...activeVideoInfo
             })
         })).then(() => {
-            this.downloadProgress.val = this.downloadTotal.val
-            setTimeout(() => {
             workRoute.parseModal.hide()
-            }, 500)
         }).catch(error => {
             alert(error.message)
         }).finally(() => {
-            this.downloadBtnDisabled.val = false
             this.isDownloading.val = false
         })
-
-        // 更新进度
-        const updateProgress = () => {
-            if (this.downloadProgress.val < this.downloadTotal.val) {
-                this.downloadProgress.val++
-                if (this.isDownloading.val) {
-                    setTimeout(updateProgress, 50)
-                }
-            }
-        }
-        setTimeout(updateProgress, 100)
     }
 
     ParseProgress() {
@@ -218,30 +205,19 @@ export class ParseModalComp implements VanComponent {
         )
     }
 
-    /** 固定在顶部的进度条 */
+    /** 固定在顶部的进度条（解析进度） */
     StickyProgress() {
         return div({
             class: 'sticky-top bg-body p-3 border-bottom',
-            hidden: () => this.totalCount.val == this.finishCount.val && !this.isDownloading.val,
+            hidden: () => this.totalCount.val == this.finishCount.val,
             style: 'z-index: 10;'
         },
             this.ParseProgress(),
-            this.DownloadProgress(),
-        )
-    }
-
-    DownloadProgress() {
-        return div({ class: 'vstack gap-3', hidden: () => !this.isDownloading.val },
-            div({ class: 'text-center fs-5' }, () => `正在创建下载任务 (${this.downloadProgress.val}/${this.downloadTotal.val})`),
-            div({ class: 'progress' }, div({
-                class: 'progress-bar progress-bar-striped progress-bar-animated',
-                style: () => `width: ${this.downloadProgress.val / this.downloadTotal.val * 100}%`
-            },)),
         )
     }
 
     ListGroup() {
-        return () => div({ class: 'list-group', hidden: () => this.totalCount.val != this.finishCount.val },
+        return () => div({ class: 'list-group', hidden: () => this.totalCount.val != this.finishCount.val || this.isDownloading.val },
             this.allPlayInfo.val.filter(info => info.info)
                 .sort((a, b) => a.page.page - b.page.page)
                 .map(info => {
@@ -355,7 +331,7 @@ export class ParseModalComp implements VanComponent {
                     _that.download()
                 },
                 hidden: () => !allFinish.val,
-                disabled: () => selectedCount.val <= 0 || _that.downloadBtnDisabled.val
+                disabled: () => selectedCount.val <= 0 || _that.isDownloading.val
             }, '开始下载'),
         )
     }