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

scripts/verify-i18n.mjs

@@ -120,6 +120,31 @@ for (const [preset, locale, expected] of presetCases) {
   }
 }
 
+const projectLibraryBundle = await build({
+  entryPoints: ['src/editor/projectLibrary.ts'],
+  bundle: true,
+  format: 'esm',
+  platform: 'node',
+  write: false,
+  logLevel: 'silent',
+})
+const projectLibrary = await import(
+  `data:text/javascript;base64,${Buffer.from(projectLibraryBundle.outputFiles[0].contents).toString('base64')}`
+)
+if (projectLibrary.normalizeProjectName('  Demo.json  ') !== 'Demo') {
+  throw new Error('Project name normalization must trim spaces and the .json suffix')
+}
+if (projectLibrary.projectJsonFileName('Demo') !== 'Demo.json') {
+  throw new Error('Project download file name is incorrect')
+}
+let invalidProjectNameRejected = false
+try {
+  projectLibrary.normalizeProjectName('bad/name')
+} catch {
+  invalidProjectNameRejected = true
+}
+if (!invalidProjectNameRejected) throw new Error('Invalid project names must be rejected')
+
 const cases = [
   [null, ['zh-CN'], 'zh-CN'],
   [null, ['zh-Hant-TW'], 'zh-TW'],