release: v0.1.6 — plugin v2, i18n instance isolation, shortcuts, toolbar, toast

feat(plugins): plugin system v2
- depends: declarative plugin dependencies with topological sort (Kahn algorithm)
- async plugins: install() returning Promise auto-await
- editor.unuse(name): uninstall individual plugins
- pluginUtils.validateConfig(schema, config): configuration validation
- plugin priority field controls install order within same dependency level

feat(i18n): instance-level locale isolation, pluralization, dynamic loading
- createInstanceI18n(): per-editor independent locale contexts
- editor.setLocale()/getLocale()/t() instance methods
- Plural rules: t('items', { count: 5 }) auto-selects one/other/few/many
- i18nUtils.loadRemote(url, locale): fetch translation packs from remote
- editor.on('localeChange') event

feat(core): toolbar & shortcut customization, context menu, toast
- editor.registerShortcut(combo, handler): custom keyboard shortcuts
- editor.configureToolbar(tools): dynamic toolbar rebuild
- editor.removeToolbarButton(action): remove single button
- editor.registerContextMenu(items): right-click context menu
- editor.toast(msg, {type, duration, animation}): toast notifications

style: toast notifications, context menu, dropdown CSS
- .me-toast with success/error/warning/info types, fade/slide animations
- .me-context-menu with items, separators, shortcut hints

test: 22 new tests covering plugin deps, unuse, shortcuts, toast, i18n plural (521 total)

chore: bump version 0.1.5 → 0.1.6 across all files, site, types

src/index.js

@@ -1,7 +1,7 @@
 /**
  * MetonaEditor - 轻量级 Markdown Editor 库
  * @module metona-editor
- * @version 0.1.5
+ * @version 0.1.6
  * @author thzxx
  * @description 现代化、零依赖、易扩展、易维护、易使用的 Markdown 编辑器库。单文件，开箱即用。
  * @license MIT
@@ -23,13 +23,13 @@
 import { MarkdownEditor } from './core.js';
 import { parseMarkdown, safeUrl, slugify, clearRenderCache } from './parser.js';
 import { themeUtils, exportCSSVars, getCSSVariable, followExternalTheme, adoptFromParent, createInstanceTheme } from './themes.js';
-import { i18nUtils } from './i18n.js';
-import { pluginUtils, presetPlugins } from './plugins.js';
+import { i18nUtils, createInstanceI18n, loadRemote } from './i18n.js';
+import { pluginUtils, presetPlugins, topologicalSort, validateConfig } from './plugins.js';
 import { animationUtils } from './animations.js';
 import { DEFAULTS, ICONS, THEMES, EDIT_MODES, DEFAULT_TOOLBAR, TOOLBAR_ACTIONS } from './constants.js';
 
 // 版本信息
-const VERSION = '0.1.5';
+const VERSION = '0.1.6';
 
 /**
  * 全局默认插件队列
@@ -202,6 +202,14 @@ const api = {
   plugins: pluginUtils,
   presetPlugins,
 
+  // 插件工具（v0.1.6）
+  topologicalSort,
+  validateConfig,
+
+  // i18n 工具（v0.1.6）
+  createInstanceI18n,
+  loadRemote,
+
   // 主题工具（v0.1.5 新增）
   exportCSSVars,
   getCSSVariable,
@@ -247,6 +255,10 @@ export {
   pluginUtils,
   presetPlugins,
   animationUtils,
+  topologicalSort,
+  validateConfig,
+  createInstanceI18n,
+  loadRemote,
   exportCSSVars,
   getCSSVariable,
   followExternalTheme,