feat: auto-save version history with 3s debounce

editor/stores/editorStore.ts

@@ -161,6 +161,19 @@ export const useEditorStore = defineStore('editor', () => {
 
   function clearAISession() { aiSessionId.value = ''; localStorage.removeItem('editor_ai_session') }
 
+  let saveVersionTimer: ReturnType<typeof setTimeout> | null = null
+  let lastSavedContent = ''
+
+  function debouncedSaveVersion() {
+    const current = JSON.stringify(gameData.value)
+    if (current === lastSavedContent) return
+    if (saveVersionTimer) clearTimeout(saveVersionTimer)
+    saveVersionTimer = setTimeout(async () => {
+      lastSavedContent = current
+      await saveVersion('手动编辑')
+    }, 3000)
+  }
+
   async function autoSave() {
     try {
       await fetch('/api/save', {
@@ -169,6 +182,7 @@ export const useEditorStore = defineStore('editor', () => {
         body: JSON.stringify({ path: sourcePath.value, data: gameData.value }),
       })
     } catch { /* dev server not running */ }
+    debouncedSaveVersion()
   }
 
   async function saveVersion(label: string) {