feat(comments): 添加评论组件自动获取页面标题和URL功能

refactor(email): 简化评论回复邮件通知逻辑
fix(docs): 移除过时的EMAIL_ADDRESS配置说明
style(store): 修改loading初始状态为true

widget/src/core/CWDComments.js

@@ -28,6 +28,12 @@ export class CWDComments {
    */
   constructor(config) {
     this.config = { ...config };
+    if (!this.config.postTitle && typeof document !== 'undefined') {
+      this.config.postTitle = document.title || this.config.postSlug;
+    }
+    if (!this.config.postUrl && typeof window !== 'undefined') {
+      this.config.postUrl = window.location.href;
+    }
     this.hostElement = this._resolveElement(config.el);
     this.shadowRoot = null;
     this.mountPoint = null;

widget/src/core/store.js

@@ -102,7 +102,7 @@ export function createCommentStore(config, fetchComments, submitComment) {
   const store = new Store({
     // 评论数据
     comments: [],
-    loading: false,
+    loading: true,
     error: null,
 
     // 分页