新增: 资源管理器文件粘贴到文件列表

- 后端 ReadClipboardFiles 读系统剪贴板 CF_HDROP 拿路径列表
- Ctrl+V 优先粘贴系统剪贴板文件，复用拖入导入链路（SFTP 上传/本机复制/目录递归）
- 补齐设计文档记录的历史缺口（Wails 限制未做）

app_clipboard.go

@@ -0,0 +1,71 @@
+//go:build windows
+
+package main
+
+import (
+	"runtime"
+	"syscall"
+	"time"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+var (
+	procIsClipboardFormatAvailable = windows.NewLazySystemDLL("user32.dll").NewProc("IsClipboardFormatAvailable")
+	procOpenClipboard              = windows.NewLazySystemDLL("user32.dll").NewProc("OpenClipboard")
+	procCloseClipboard             = windows.NewLazySystemDLL("user32.dll").NewProc("CloseClipboard")
+	procGetClipboardData           = windows.NewLazySystemDLL("user32.dll").NewProc("GetClipboardData")
+	procDragQueryFileW             = windows.NewLazySystemDLL("shell32.dll").NewProc("DragQueryFileW")
+)
+
+// cfHDrop 剪贴板文件列表格式（资源管理器复制文件/文件夹），Win32 稳定 ABI 值
+const cfHDrop = 15
+
+// ReadClipboardFiles 读取系统剪贴板中的文件/文件夹路径列表。
+// 剪贴板为文本/截图等非文件内容时返回空列表，前端据此回落图片粘贴等原有链路。
+func (a *App) ReadClipboardFiles() ([]string, error) {
+	// OpenClipboard 与 CloseClipboard 必须同线程，否则剪贴板死锁
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	if r, _, _ := procIsClipboardFormatAvailable.Call(cfHDrop); r == 0 {
+		return nil, nil
+	}
+
+	// 剪贴板是全局互斥资源，短重试避开其他进程的瞬时占用
+	opened := false
+	for i := 0; i < 20; i++ {
+		if r, _, _ := procOpenClipboard.Call(0); r != 0 {
+			opened = true
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	if !opened {
+		return nil, syscall.EBUSY
+	}
+	defer procCloseClipboard.Call()
+
+	h, _, _ := procGetClipboardData.Call(cfHDrop)
+	if h == 0 {
+		return nil, nil
+	}
+
+	count, _, _ := procDragQueryFileW.Call(h, 0xFFFFFFFF, 0, 0)
+	if count == 0 {
+		return nil, nil
+	}
+
+	paths := make([]string, 0, count)
+	for i := uintptr(0); i < count; i++ {
+		n, _, _ := procDragQueryFileW.Call(h, i, 0, 0)
+		if n == 0 {
+			continue
+		}
+		buf := make([]uint16, n+1)
+		procDragQueryFileW.Call(h, i, uintptr(unsafe.Pointer(&buf[0])), n+1)
+		paths = append(paths, syscall.UTF16ToString(buf))
+	}
+	return paths, nil
+}

frontend/bindings/u-desk/app.ts

@@ -491,6 +491,16 @@ export function PickDirectory(): $CancellablePromise<string> {
     return $Call.ByID(1347829059);
 }
 
+/**
+ * ReadClipboardFiles 读取系统剪贴板中的文件/文件夹路径列表。
+ * 剪贴板为文本/截图等非文件内容时返回空列表，前端据此回落图片粘贴等原有链路。
+ */
+export function ReadClipboardFiles(): $CancellablePromise<string[]> {
+    return $Call.ByID(2636780132).then(($result: any) => {
+        return $$createType7($result);
+    });
+}
+
 /**
  * ReadFile 读取文件
  */
@@ -797,3 +807,4 @@ const $$createType3 = filesystem$0.FileOperationResult.createFrom;
 const $$createType4 = $Create.Nullable($$createType3);
 const $$createType5 = $Create.Array($$createType2);
 const $$createType6 = $Create.Map($Create.Any, $Create.Any);
+const $$createType7 = $Create.Array($Create.Any);

frontend/src/components/FileSystem/index.vue

@@ -129,6 +129,7 @@ import { ref, computed, onMounted, onUnmounted, watch, nextTick } from 'vue'
 import { getPathSeparator } from '@/utils/fileUtils'
 import { Message, Modal } from '@arco-design/web-vue'
 import { On, Off } from '@wailsio/events'
+import { ReadClipboardFiles } from '@bindings/u-desk/app'
 import { renderMarkdown, parseMarkdown, isMarkedReady, preloadMarked, renderMermaidDiagrams, rerenderMermaidDiagrams, setCurrentFileDir, setFileServerBase } from '@/utils/markedExtensions'
 import { useThemeStore } from '@/stores/theme'
 import { useTransferStore } from '@/stores/transfer'
@@ -2023,6 +2024,17 @@ const handlePaste = async (event: ClipboardEvent) => {
   const target = event.target as HTMLElement
   if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA' || target.isContentEditable) return
 
+  // 系统剪贴板文件（资源管理器复制，文件+文件夹）优先：
+  // 后端读 CF_HDROP 拿真实路径（DOM paste 拿不到文件夹），复用拖入导入链路
+  try {
+    const sysPaths = await ReadClipboardFiles()
+    if (sysPaths && sysPaths.length > 0) {
+      event.preventDefault()
+      await handleExternalDrop(sysPaths)
+      return
+    }
+  } catch { /* 剪贴板被占用等，回落图片粘贴 */ }
+
   const items = event.clipboardData?.items
   if (!items) return