add Move submenu to file context menu and fix shift-click anchor update

- Add nested Move submenu to FileRowContextMenu using DropdownMenuSub/SubTrigger/SubContent; shows available folders filtered by selection, converts '__root__' -> null for moving to the root level
- Add handleContextMenuMove in files.tsx that calls moveItems.mutateAsync directly (no modal) and clears selection on success
- Fix shift-click range selection: update lastSelectedIndexRef after range select so chained shift-clicks extend from the new anchor point correctly

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/files/components/file-row-context-menu/file-row-context-menu.tsx

@@ -1,17 +1,27 @@
 'use client'
 
 import { memo } from 'react'
+import { FolderInput } from 'lucide-react'
 import {
   Download,
   DropdownMenu,
   DropdownMenuContent,
   DropdownMenuItem,
   DropdownMenuSeparator,
+  DropdownMenuSub,
+  DropdownMenuSubContent,
+  DropdownMenuSubTrigger,
   DropdownMenuTrigger,
   Eye,
   Pencil,
   Trash2,
 } from '@/components/emcn'
+import { Folder } from '@/components/emcn/icons'
+
+interface MoveOption {
+  value: string
+  label: string
+}
 
 interface FileRowContextMenuProps {
   isOpen: boolean
@@ -21,6 +31,8 @@ interface FileRowContextMenuProps {
   onDownload?: () => void
   onRename: () => void
   onDelete: () => void
+  onMove?: (optionValue: string) => void
+  moveOptions?: MoveOption[]
   canEdit: boolean
   selectedCount: number
 }
@@ -33,6 +45,8 @@ export const FileRowContextMenu = memo(function FileRowContextMenu({
   onDownload,
   onRename,
   onDelete,
+  onMove,
+  moveOptions,
   canEdit,
   selectedCount,
 }: FileRowContextMenuProps) {
@@ -81,6 +95,22 @@ export const FileRowContextMenu = memo(function FileRowContextMenu({
                 Rename
               </DropdownMenuItem>
             )}
+            {onMove && moveOptions && moveOptions.length > 0 && (
+              <DropdownMenuSub>
+                <DropdownMenuSubTrigger>
+                  <FolderInput />
+                  {isMultiSelect ? `Move ${selectedCount} items` : 'Move to'}
+                </DropdownMenuSubTrigger>
+                <DropdownMenuSubContent>
+                  {moveOptions.map((option) => (
+                    <DropdownMenuItem key={option.value} onSelect={() => onMove(option.value)}>
+                      <Folder />
+                      {option.label}
+                    </DropdownMenuItem>
+                  ))}
+                </DropdownMenuSubContent>
+              </DropdownMenuSub>
+            )}
             <DropdownMenuItem onSelect={onDelete}>
               <Trash2 />
               {isMultiSelect ? `Delete ${selectedCount} items` : 'Delete'}

apps/sim/app/workspace/[workspaceId]/files/files.tsx

@@ -509,6 +509,7 @@ export function Files() {
             for (let i = start; i <= end; i++) next.add(visibleRowIds[i])
             return next
           })
+          lastSelectedIndexRef.current = currentIndex
         } else {
           setSelectedRowIds((prev) => {
             const next = new Set(prev)
@@ -1194,6 +1195,26 @@ export function Files() {
     closeContextMenu()
   }, [selectedRowIds, handleBulkDelete, closeContextMenu])
 
+  const handleContextMenuMove = useCallback(
+    async (optionValue: string) => {
+      const targetFolderId = optionValue === '__root__' ? null : optionValue
+      try {
+        await moveItems.mutateAsync({
+          workspaceId,
+          fileIds: selectedFileIds,
+          folderIds: selectedFolderIds,
+          targetFolderId,
+        })
+        setSelectedRowIds(new Set())
+        closeContextMenu()
+      } catch (error) {
+        logger.error('Failed to move items:', error)
+        toast.error(toError(error).message)
+      }
+    },
+    [moveItems.mutateAsync, workspaceId, selectedFileIds, selectedFolderIds, closeContextMenu]
+  )
+
   const handleContentContextMenu = useCallback(
     (e: React.MouseEvent) => {
       const target = e.target as HTMLElement
@@ -1799,6 +1820,8 @@ export function Files() {
         onDownload={handleContextMenuDownload}
         onRename={handleContextMenuRename}
         onDelete={handleContextMenuDelete}
+        onMove={handleContextMenuMove}
+        moveOptions={moveFolderOptions}
         canEdit={canEdit}
         selectedCount={selectedRowIds.size}
       />