chore(cleanup): 미사용 코드 정리 및 레거시 파일 삭제

src/widgets/space-tools-dock/model/useSpaceToolsDock.ts

@@ -1,23 +0,0 @@
-'use client';
-
-import { useState } from 'react';
-
-export type SpaceToolPanel = 'sound' | 'room' | 'notes' | 'quick' | null;
-
-export const useSpaceToolsDock = () => {
-  const [activePanel, setActivePanel] = useState<SpaceToolPanel>(null);
-
-  const togglePanel = (panel: Exclude<SpaceToolPanel, null>) => {
-    setActivePanel((current) => (current === panel ? null : panel));
-  };
-
-  const closePanel = () => {
-    setActivePanel(null);
-  };
-
-  return {
-    activePanel,
-    togglePanel,
-    closePanel,
-  };
-};