refactor: remove drag and drop from the objects tree

Decided during manual testing: the legacy drop-inside zone had zero
height, so drops only worked before/after a node and moves happened by
accident. Sections are re-parented via Edit, as before.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/webparts/stroyBot/pages/objects/ObjectsTree.tsx

@@ -5,7 +5,6 @@ import { IMenuAnchor } from '../_tree/ContextMenu';
 import { countNodes } from '../_tree/treeRules';
 import { ObjectNode, ObjectTree } from './objectsTypes';
 import { IObjectTreeView } from './useObjectTreeView';
-import { IObjectDrag } from './useObjectDrag';
 import { ObjectTreeNode } from './ObjectTreeNode';
 import { OBJECTS_TEXTS } from './texts';
 import styles from './ObjectsPage.module.scss';
@@ -14,13 +13,12 @@ interface Props {
   tree: ObjectTree;
   canEdit: boolean;
   view: IObjectTreeView;
-  drag: IObjectDrag;
   onOpenMenu: (node: ObjectNode, anchor: IMenuAnchor) => void;
   onAddRoot: () => void;
 }
 
 /** Панель «N объектов / Развернуть / Свернуть» и дерево объектов (или «Объекты не найдены»). */
-export const ObjectsTree: React.FC<Props> = ({ tree, canEdit, view, drag, onOpenMenu, onAddRoot }) => (
+export const ObjectsTree: React.FC<Props> = ({ tree, canEdit, view, onOpenMenu, onAddRoot }) => (
   <>
     <div className={styles.toolbar}>
       <span className={styles.totalCount}>{OBJECTS_TEXTS.toolbar.total(countNodes(tree.roots))}</span>
@@ -48,16 +46,9 @@ export const ObjectsTree: React.FC<Props> = ({ tree, canEdit, view, drag, onOpen
       />
     )}
 
-    <div className={styles.tree} onDrop={drag.onDrop}>
+    <div className={styles.tree}>
       {tree.roots.map((node) => (
-        <ObjectTreeNode
-          key={node.id}
-          node={node}
-          canEdit={canEdit}
-          view={view}
-          drag={drag}
-          onOpenMenu={onOpenMenu}
-        />
+        <ObjectTreeNode key={node.id} node={node} canEdit={canEdit} view={view} onOpenMenu={onOpenMenu} />
       ))}
     </div>
   </>