리펙토링: 전체 구조 검토, 개선

src/renderer/history.js

@@ -1,12 +1,18 @@
 const MAX = 50;
-let _stack  = [];  // each entry: { files: [], affectedPaths: Set | null }
-let _cursor = -1;
+let _stack    = [];
+let _cursor   = -1;
+let _onUpdate = null;
+
+export function setOnUpdate(fn) {
+  _onUpdate = fn;
+}
 
 export function push(files, affectedPaths = null) {
   _stack = _stack.slice(0, _cursor + 1);
   _stack.push({ files: [...files], affectedPaths: affectedPaths ? new Set(affectedPaths) : null });
   if (_stack.length > MAX) _stack.shift();
   _cursor = _stack.length - 1;
+  _onUpdate?.();
 }
 
 // Returns { files, affectedPaths } where affectedPaths are from the entry being undone
@@ -14,6 +20,7 @@ export function undo() {
   if (!canUndo()) return null;
   const affectedPaths = _stack[_cursor].affectedPaths;
   --_cursor;
+  _onUpdate?.();
   return { files: [..._stack[_cursor].files], affectedPaths };
 }
 
@@ -21,6 +28,7 @@ export function undo() {
 export function redo() {
   if (!canRedo()) return null;
   ++_cursor;
+  _onUpdate?.();
   return { files: [..._stack[_cursor].files], affectedPaths: _stack[_cursor].affectedPaths };
 }
 
@@ -30,4 +38,5 @@ export function canRedo() { return _cursor < _stack.length - 1; }
 export function reset() {
   _stack  = [];
   _cursor = -1;
+  _onUpdate?.();
 }