完善浏览器配置库与未保存提示

- 新增 IndexedDB 配置保存、加载、删除及批量导入导出

- 配置列表支持选中、双击加载和悬浮操作提示

- 新增未保存提示设置，默认关闭并持久化到浏览器

- 优化配置管理界面并同步九种语言文案

- 更新开发文档与生产构建产物

src/views/Stage.vue

@@ -40,9 +40,9 @@ import { loopPlaybackRange } from '../core/loopSegmentTiming'
 import { collectSubEmitterIds } from '../core/subEmitterIds'
 import { useParticleStore, type CollisionBody, type ParticleSystem } from '../store/particleStore'
 import { SpineRuntimeLayer } from '../spine/SpineRuntimeLayer'
-import { installEditorHistory, undoLastOperation } from '../editor/editorHistory'
+import { editorHistoryState, installEditorHistory, undoLastOperation } from '../editor/editorHistory'
 import { useEditorShortcuts } from '../editor/useEditorShortcuts'
-import { downloadEditorConfig } from '../editor/editorConfig'
+import { PROJECT_SAVE_EVENT } from '../editor/projectLibrary'
 import HelpDialog from './HelpDialog.vue'
 import StageToolbar from './StageToolbar.vue'
 import StageSettingsPanel from './StageSettingsPanel.vue'
@@ -166,6 +166,12 @@ function onStageDoubleClick(e: MouseEvent) {
   pathEditing.onStageDoubleClick(e)
 }
 
+function onBeforeUnload(event: BeforeUnloadEvent) {
+  if (!store.settings.unsavedChangesPrompt || !editorHistoryState.dirty) return
+  event.preventDefault()
+  event.returnValue = ''
+}
+
 function onWheelEvent(e: WheelEvent) {
   onWheel(stageContext, e)
 }
@@ -182,7 +188,7 @@ useEditorShortcuts({
   canvasElement: holder,
   canvasFocused,
   undo: undoLastOperation,
-  save: () => downloadEditorConfig(store),
+  save: () => window.dispatchEvent(new Event(PROJECT_SAVE_EVENT)),
   togglePlay: () => store.togglePlay(),
   toStart: () => store.toStart(),
   setTool: (tool) => { activeTool.value = tool },
@@ -553,9 +559,11 @@ onMounted(async () => {
     },
   )
   installEditorHistory(store)
+  window.addEventListener('beforeunload', onBeforeUnload)
 })
 
 onUnmounted(() => {
+  window.removeEventListener('beforeunload', onBeforeUnload)
   cancelAnimationFrame(raf)
   spineRuntime?.destroy()
   spineRuntime = null