DMS: handleDropFiles + handleDropFolder callbacks

frontend/src/pages/Dms.tsx

@@ -2,6 +2,7 @@
  * DMS file browser page — complete redesign.
  * 3-column explorer-style layout: SourceTree | FileExplorer | FileDetails.
  * Uses PluginToolbar for actions, ResizablePanel for desktop layout.
+ * Supports drag-and-drop: files→folders, folders→folders (reparent), files→root.
  */
 
 import React, { useState, useEffect, useCallback, useRef } from 'react';
@@ -30,6 +31,7 @@ import {
   getSharedWithMe,
   bulkMoveFiles,
   bulkDeleteFiles,
+  updateFolder,
   type DmsFolder,
   type DmsFile,
 } from '@/api/dms';
@@ -303,6 +305,53 @@ export function DmsPage() {
     setSelectedSource('local');
   }, []);
 
+  // ─── Drag-and-drop handlers ───
+
+  // Handle files dropped onto a folder (or root when targetFolderId is null)
+  const handleDropFiles = useCallback(async (fileIds: string[], targetFolderId: string | null) => {
+    if (fileIds.length === 0) return;
+    try {
+      await bulkMoveFiles({
+        file_ids: fileIds,
+        target_folder_id: targetFolderId,
+      });
+      toast.success(
+        targetFolderId
+          ? t('dms.filesMoved')
+          : t('dms.filesMovedRoot')
+      );
+      // Remove moved files from current view (unless we're in the target folder)
+      if (selectedFolderId !== targetFolderId) {
+        setFiles((prev) => prev.filter((f) => !fileIds.includes(f.id)));
+      }
+      // Reload folders to update file counts
+      loadFolders();
+      // If dropping into a folder, navigate to it
+      if (targetFolderId) {
+        setSelectedFolderId(targetFolderId);
+        setSelectedSource('local');
+        setSearchQuery('');
+        setSelectedFileIds(new Set());
+      }
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err);
+      toast.error(msg);
+    }
+  }, [selectedFolderId, toast, t, loadFolders]);
+
+  // Handle folder dropped onto another folder (reparent) or root
+  const handleDropFolder = useCallback(async (sourceFolderId: string, targetFolderId: string | null) => {
+    if (sourceFolderId === targetFolderId) return;
+    try {
+      await updateFolder(sourceFolderId, { parent_id: targetFolderId });
+      toast.success(t('dms.folderMoved'));
+      loadFolders();
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err);
+      toast.error(msg);
+    }
+  }, [toast, t, loadFolders]);
+
   // Register toolbar items
   const registerItems = usePluginToolbarStore((s) => s.registerItems);
   const unregisterPlugin = usePluginToolbarStore((s) => s.unregisterPlugin);
@@ -470,6 +519,8 @@ export function DmsPage() {
             onSelectFolder={handleSelectFolder}
             onSelectSource={handleSelectSource}
             loading={loadingFolders}
+            onDropFiles={handleDropFiles}
+            onDropFolder={handleDropFolder}
           />
         </ResizablePanel>
 
@@ -537,6 +588,8 @@ export function DmsPage() {
               onSelectFolder={handleSelectFolder}
               onSelectSource={handleSelectSource}
               loading={loadingFolders}
+              onDropFiles={handleDropFiles}
+              onDropFolder={handleDropFolder}
             />
           </div>
         )}