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/i18n/locales/zh-CN.json

@@ -87,12 +87,13 @@
     "tickWidth": "刻度线粗细",
     "axisColor": "坐标轴颜色",
     "showAxisLabels": "显示刻度数值",
+    "unsavedPrompt": "未保存提示",
     "cacheNote": "整个系统设置会自动保存到当前浏览器"
   },
   "config": {
     "title": "配置管理",
     "save": "保存配置",
-    "saveTitle": "保存全部编辑器配置 (Ctrl+S)",
+    "saveTitle": "保存配置到浏览器缓存",
     "load": "加载配置",
     "loadTitle": "加载本地编辑器配置",
     "presets": "预设列表",
@@ -110,7 +111,35 @@
     "presetRestoring": "正在解析并恢复预设资源…",
     "presetComplete": "预设加载完成",
     "presetListError": "无法读取预设列表",
-    "presetReadError": "无法读取预设：{file}"
+    "presetReadError": "无法读取预设：{file}",
+    "local": {
+      "listTitle": "配置列表",
+      "empty": "浏览器中还没有保存的配置",
+      "saveTitle": "保存配置到浏览器缓存",
+      "name": "配置名称",
+      "namePlaceholder": "例如：烟花效果",
+      "load": "加载",
+      "loadHint": "双击以加载",
+      "download": "下载",
+      "delete": "删除",
+      "downloadCurrent": "下载当前配置",
+      "downloadAll": "下载所有配置",
+      "loadAll": "加载所有配置",
+      "loadAllConfirm": "将导入 {count} 个配置文件，同名配置会被覆盖。是否继续？",
+      "loadAllDone": "已从文件加载 {count} 个配置",
+      "loadAllPartial": "已导入 {imported} 个配置，{failed} 个文件失败",
+      "overwriteSave": "“{name}”已存在，是否覆盖？",
+      "loadOverwrite": "加载“{name}”会覆盖当前场景，未保存的修改将丢失。是否继续？",
+      "deleteConfirm": "确定删除“{name}”吗？",
+      "nameRequired": "请输入配置名称",
+      "nameInvalid": "配置名称不能包含 \\ / : * ? \" ＜ ＞ |",
+      "storageUnavailable": "浏览器本地存储不可用",
+      "saved": "已保存到浏览器：{name}",
+      "loaded": "已从浏览器加载：{name}",
+      "deleted": "已删除缓存配置：{name}",
+      "downloadEmpty": "没有可下载的配置",
+      "downloaded": "已下载：{name}"
+    }
   },
   "curve": {
     "bezierHint": "拖动方形手柄调整弧度 · 双击空白新建 · 双击节点删除",