fix: Local->Many 传输等待后端任务真正完成

- 改用 uploadFile + subscribeUploadProgress 替代 uploadFileWithProgress
- 只有后端任务状态为 success 才标记成功
- 修复显示成功但远端无文件的问题

frontend/src/stores/transfers.ts

@@ -1,7 +1,7 @@
 import { defineStore } from 'pinia'
 import { ref, computed } from 'vue'
 
-import { createRemoteTransferTask, subscribeRemoteTransferProgress, uploadFileWithProgress } from '../api/sftp'
+import { createRemoteTransferTask, subscribeRemoteTransferProgress, uploadFile, subscribeUploadProgress } from '../api/sftp'
 
 export type TransferMode = 'LOCAL_TO_MANY' | 'REMOTE_TO_MANY'
 export type TransferItemStatus = 'queued' | 'running' | 'success' | 'error' | 'cancelled'
@@ -188,17 +188,11 @@ export const useTransfersStore = defineStore('transfers', () => {
 
     runs.value = [run, ...runs.value]
 
-    const activeXhrs: XMLHttpRequest[] = []
+    let cancelled = false
     const unsubscribers: (() => void)[] = []
     controllers.set(runId, {
       abortAll: () => {
-        for (const xhr of activeXhrs) {
-          try {
-            xhr.abort()
-          } catch {
-            // ignore
-          }
-        }
+        cancelled = true
       },
       unsubscribers,
     })
@@ -211,7 +205,7 @@ export const useTransfersStore = defineStore('transfers', () => {
         if (itemIndex === -1) continue
         const item = runItems[itemIndex]!
         tasks.push(async () => {
-          if (item.status === 'cancelled') return
+          if (item.status === 'cancelled' || cancelled) return
           item.status = 'running'
           item.progress = 0
           item.startedAt = now()
@@ -219,28 +213,24 @@ export const useTransfersStore = defineStore('transfers', () => {
           const stopPseudoProgress = startPseudoProgress(item)
 
           try {
-            const xhr = uploadFileWithProgress(connectionId, targetDir || '', file)
-            activeXhrs.push(xhr)
+            // 发起上传并获取 taskId
+            const uploadRes = await uploadFile(connectionId, targetDir || '', file)
+            const taskId = uploadRes.data.taskId
 
+            // 订阅上传任务进度，等待真正完成
             await new Promise<void>((resolve, reject) => {
-              let lastTick = 0
-              xhr.onProgress = (percent) => {
-                console.log('[Transfers] onProgress callback fired:', percent, 'item:', item.label)
-                const t = now()
-                if (t - lastTick < 100 && percent !== 100) return
-                lastTick = t
-                const newProgress = Math.max(item.progress || 0, Math.max(0, Math.min(100, percent)))
-                console.log('[Transfers] Updating item.progress from', item.progress, 'to', newProgress)
-                item.progress = newProgress
+              const unsubscribe = subscribeUploadProgress(taskId, (task) => {
+                const progress = Math.max(0, Math.min(100, task.progress || 0))
+                item.progress = progress
                 runs.value = [...runs.value]
+
+                if (task.status === 'success') {
+                  resolve()
+                } else if (task.status === 'error') {
+                  reject(new Error(task.error || 'Upload failed'))
                 }
-              console.log('[Transfers] Set onProgress callback for:', item.label)
-              xhr.onload = () => {
-                if (xhr.status >= 200 && xhr.status < 300) resolve()
-                else reject(new Error(xhr.responseText || `HTTP ${xhr.status}`))
-              }
-              xhr.onerror = () => reject(new Error('Network error'))
-              xhr.onabort = () => reject(new Error('Cancelled'))
+              })
+              unsubscribers.push(unsubscribe)
             })
 
             item.status = 'success'