fix(#19,#22,#23): 动画取消reject替代resolve; config.style深拷贝; queue消息级duration/onClose优先

src/core.js

@@ -79,6 +79,10 @@ class Toast {
     this.html = opts.html || '';
     this.iconHTML = opts.iconHTML || '';
     this.config = { ...DEFAULTS, ...opts };
+    // 防止嵌套对象被多个 toast 实例共享引用
+    if (opts.style && typeof opts.style === 'object') {
+      this.config.style = { ...opts.style };
+    }
     this.el = null;
     this.barEl = null;
     this.rafId = null;
@@ -991,13 +995,18 @@ const meToast = {
         index++;
         
         const msg = typeof message === 'string' ? message : (message?.message || '');
+        const msgObj = (typeof message === 'object' && message !== null) ? message : {};
+        const msgOnClose = msgObj.onClose;
         
         this._emit({
           ...opts,
-          ...((typeof message === 'object' && message !== null) ? message : {}),
+          ...msgObj,
           message: msg,
-          duration: opts.duration || 3000,
+          duration: msgObj.duration || opts.duration || 3000,
           onClose: (toast) => {
+            if (typeof msgOnClose === 'function') {
+              try { msgOnClose(toast); } catch (_) {}
+            }
             if (typeof userOnClose === 'function') {
               try { userOnClose(toast); } catch (_) {}
             }