fix(frontend): 跨服务器传输默认使用各机目标路径

选源机浏览 A.target_path；选目标机填入 B.target_path。

docs/changelog/2026-06-21-server-transfer-target-path-default.md

@@ -0,0 +1,28 @@
+# 跨服务器传输：默认进入各机目标路径
+
+**日期**：2026-06-21
+
+## 摘要
+
+选源服务器 A 后浏览目录默认进入 A 的 `target_path`；选目标服务器 B 后「目标目录/归档路径」默认填入 B 的 `target_path`（切换 B 时不用旧 localStorage 覆盖）。
+
+## 动机
+
+与文件管理页一致：运维以各机业务根目录为起点，减少每次手动改路径。
+
+## 涉及文件
+
+- `frontend/src/composables/useServerFileTransfer.ts` — `serverTargetPath`、`applyDestPathForServer`
+
+## 行为
+
+| 操作 | 默认路径 |
+|------|----------|
+| 选 A | 左侧浏览 `A.target_path`（无则 `/www/wwwroot`） |
+| 从文件页带 `?path=` | 仍用 query 路径 |
+| 选 B | 直传 → `B.target_path`；打包 → `B.target_path/xxx.tar.gz` |
+| 仅切换直传/打包 | 仍可读该 B 机上次保存的路径 |
+
+## 验证
+
+`cd frontend && npx vite build`；页内选 A/B 观察路径字段。

frontend/src/composables/useServerFileTransfer.ts

@@ -126,9 +126,15 @@ export function useServerFileTransfer() {
     }
   }
 
+  function serverTargetPath(serverId: number | null): string {
+    if (!serverId) return DEFAULT_FILES_ROOT
+    const srv = serverList.value.find((s) => s.id === serverId)
+    const tp = srv?.target_path?.trim()
+    return tp ? normalizeRemotePath(tp) : DEFAULT_FILES_ROOT
+  }
+
   function defaultDestPath(mode: ServerTransferMode, destId: number | null): string {
-    const destSrv = destId ? serverList.value.find((s) => s.id === destId) : undefined
-    const base = destSrv?.target_path?.trim() || '/tmp'
+    const base = serverTargetPath(destId)
     const normalizedBase = base.endsWith('/') ? base.slice(0, -1) : base
     if (mode === 'relay') return normalizedBase
     const first = effectivePaths.value[0]
@@ -137,6 +143,21 @@ export function useServerFileTransfer() {
     return `${normalizedBase}/${safe}.tar.gz`
   }
 
+  function applyDestPathForServer(destId: number | null, preferStored = false) {
+    if (!destId) {
+      destPath.value = ''
+      return
+    }
+    if (preferStored) {
+      const stored = loadStoredDest(transferMode.value, destId)
+      if (stored) {
+        destPath.value = stored
+        return
+      }
+    }
+    destPath.value = defaultDestPath(transferMode.value, destId)
+  }
+
   function recommendMode(paths: string[]): ServerTransferMode {
     for (const p of paths) {
       const item = files.value.find(
@@ -155,40 +176,32 @@ export function useServerFileTransfer() {
     return 'relay'
   }
 
-  function syncDestPathDefaults() {
-    if (!destServerId.value) return
-    const stored = loadStoredDest(transferMode.value, destServerId.value)
-    destPath.value = stored || defaultDestPath(transferMode.value, destServerId.value)
-  }
-
   function onSourceServerChange(id: number | null) {
     sourceServerId.value = id
     sourceServerSearchQuery.value = ''
     selectedPaths.value = []
-    currentPath.value = DEFAULT_FILES_ROOT
     if (id) {
-      const srv = serverList.value.find((s) => s.id === id)
-      if (srv?.target_path?.trim()) {
-        currentPath.value = normalizeRemotePath(srv.target_path)
-      }
+      currentPath.value = serverTargetPath(id)
+    } else {
+      currentPath.value = DEFAULT_FILES_ROOT
     }
     const candidates = destServers.value
     if (!destServerId.value || destServerId.value === id) {
       destServerId.value = candidates[0]?.id ?? null
     }
-    syncDestPathDefaults()
+    applyDestPathForServer(destServerId.value, false)
     void browse()
   }
 
   function onDestServerChange(id: number | null) {
     destServerId.value = id
     destServerSearchQuery.value = ''
-    syncDestPathDefaults()
+    applyDestPathForServer(id, false)
   }
 
   function onModeChange(mode: ServerTransferMode) {
     transferMode.value = mode
-    syncDestPathDefaults()
+    applyDestPathForServer(destServerId.value, true)
   }
 
   async function browse(path?: string) {
@@ -254,7 +267,11 @@ export function useServerFileTransfer() {
     if (Number.isFinite(src) && src > 0) {
       sourceServerId.value = src
       const pathQ = typeof q.path === 'string' ? q.path : ''
-      if (pathQ) currentPath.value = normalizeRemotePath(pathQ)
+      if (pathQ) {
+        currentPath.value = normalizeRemotePath(pathQ)
+      } else {
+        currentPath.value = serverTargetPath(src)
+      }
       const pathsQ = typeof q.paths === 'string' ? q.paths : ''
       if (pathsQ) {
         selectedPaths.value = pathsQ.split('|').map((p) => normalizeRemotePath(p))
@@ -265,7 +282,7 @@ export function useServerFileTransfer() {
       const candidates = serverList.value.filter((s) => s.id !== sourceServerId.value)
       destServerId.value = candidates[0]?.id ?? null
       transferMode.value = recommendMode(selectedPaths.value)
-      syncDestPathDefaults()
+      applyDestPathForServer(destServerId.value, false)
       void browse()
     }
   }