release: v0.2.0 — TypeScript 源码重构

### Changed
- 全部源码从 JavaScript 迁移到 TypeScript (strict mode)
- core.js (1244行) 拆分为 toast.ts + api.ts + templates.ts
- 删除手动维护的 types/index.d.ts，类型从源码自动生成
- 构建工具链: Babel → ts-jest, 新增 @rollup/plugin-typescript
- 新增 rollup-plugin-dts 生成合并 .d.ts

### Added
- tsconfig.json (strict: true)
- src/types.ts 核心类型模块 (39 个导出类型)
- .eslintrc.json (@typescript-eslint)
- .gitea/workflows/ci.yml (Node 18/20/22/24 矩阵)
- CHANGELOG.md

### Aligned with metona-starter
- package.json: type:module, engines≥16, prepublishOnly
- rollup.config.js: dts plugin, port 3001
- jest.config.cjs, build.sh, serve.sh, .gitignore (.npmrc)

### Removed
- babel.config.js, types/ 目录, 所有 src/*.js

src/animations.ts

@@ -0,0 +1,89 @@
+/**
+ * MetonaToast Animations — 动画管理
+ * @module animations
+ * @version 0.2.0
+ */
+
+import { ANIMATIONS } from './constants.js';
+import type { AnimationConfig, AnimationUtils } from './types.js';
+
+// 动画缓存
+const animationMap: Map<string, AnimationConfig> = new Map();
+
+// 注册默认动画
+Object.entries(ANIMATIONS).forEach(([name, config]) => {
+  animationMap.set(name, {
+    name,
+    enter: config.enter,
+    leave: config.leave,
+    duration: config.duration,
+    easing: config.easing,
+  });
+});
+
+/**
+ * 动画工具函数
+ */
+export const animationUtils: AnimationUtils = {
+  register(name: string, config: Partial<AnimationConfig>): void {
+    animationMap.set(name, {
+      name,
+      enter: config.enter || {},
+      leave: config.leave || {},
+      duration: config.duration || 300,
+      easing: config.easing || 'cubic-bezier(0.4, 0, 0.2, 1)',
+    });
+  },
+
+  unregister(name: string): void {
+    animationMap.delete(name);
+  },
+
+  get(name: string): AnimationConfig | null {
+    return animationMap.get(name) || null;
+  },
+
+  getAnimationNames(): string[] {
+    return Array.from(animationMap.keys());
+  },
+
+  getActiveCount(): number {
+    return animationMap.size;
+  },
+
+  cancelAll(): void {
+    // CSS动画由浏览器原生管理，无需手动取消
+  },
+
+  reset(): void {
+    animationMap.clear();
+    Object.entries(ANIMATIONS).forEach(([name, config]) => {
+      animationMap.set(name, {
+        name,
+        enter: config.enter,
+        leave: config.leave,
+        duration: config.duration,
+        easing: config.easing,
+      });
+    });
+  },
+
+  destroy(): void {
+    animationMap.clear();
+  },
+};
+
+/**
+ * 动画预设（占位，兼容旧API）
+ */
+export const animationPresets: Record<string, AnimationConfig> = {};
+
+/**
+ * 创建自定义动画配置
+ */
+export const createAnimation = (config: Partial<AnimationConfig>): AnimationConfig => ({
+  enter: config.enter || {},
+  leave: config.leave || {},
+  duration: config.duration || 300,
+  easing: config.easing || 'cubic-bezier(0.4, 0, 0.2, 1)',
+});