feat: scaffold mindmap core and layout engine

src/components/mindmap/text/useMindmapTextEdit.ts

@@ -0,0 +1,17 @@
+import { useState, useCallback } from 'react';
+import { mindmapCommandBus } from '@/lib/mindmap/command/MindmapCommandBus';
+
+export function useMindmapTextEdit(nodeId: string) {
+  const [value, setValue] = useState('');
+
+  const handleChange = useCallback(
+    (next: string) => {
+      setValue(next);
+      mindmapCommandBus.emit('SET_NODE_TEXT', { nodeId, text: next });
+    },
+    [nodeId],
+  );
+
+  return { value, setValue, handleChange };
+}
+