feat: dashboard UI improvements - 8 changes

1. Web CAD title larger (24px, font-weight 800)
2. Gear icon opens SettingsModal
3. Folder drag-and-drop with nested folders (backend parent_id support)
4. Icon-only card buttons with CSS tooltips
5. Canvas preview (deterministic SVG per project)
6. Info panel: smaller title, double-height description
7. User/group permission selector
8. oe → ö correction

frontend/src/services/api.ts

@@ -577,6 +577,33 @@ export async function deleteProjectShare(token: string, shareId: string): Promis
   if (!res.ok) throw new Error('Failed to delete share');
 }
 
+// ─── Move Project Folder (update parent_id) ──────────────
+export async function moveProjectFolder(token: string, folderId: string, parentId: string | null, currentName: string): Promise<ProjectFolder> {
+  const res = await fetch(`${API_BASE}/api/project-folders/${folderId}`, {
+    method: 'PUT',
+    headers: authHeaders(token),
+    body: JSON.stringify({ name: currentName, parent_id: parentId }),
+  });
+  if (!res.ok) throw new Error('Failed to move project folder');
+  return res.json();
+}
+
+// ─── Users (for permission selection in info panel) ─────
+export interface SimpleUser {
+  id: string;
+  email: string;
+  name: string;
+  role: string;
+  created_at: string;
+  updated_at: string;
+}
+
+export async function getUsers(token: string): Promise<SimpleUser[]> {
+  const res = await fetch(`${API_BASE}/api/users`, { headers: authHeaders(token) });
+  if (!res.ok) throw new Error('Failed to load users');
+  return res.json();
+}
+
 // ─── Global Block Folders ───────────────────────────────────
 export interface GlobalBlockFolder {
   id: string;