feat(header): 新增头部组件功能与样式优化

- 添加默认头像图片资源
- 扩展监听文件同步配置
- 重构头像展示样式，增加背景和尺寸控制
- 完善签到功能逻辑和样式交互
- 新增头部组件HTML模板和JS实现
- 调整搜索框和历史记录显示逻辑
- 优化页面布局和响应式设计

css/public.less

@@ -1896,10 +1896,10 @@ body {
 }
 
 .head-top {
-    margin-top: 20px;
-    margin-bottom: 30px;
     position: relative;
     z-index: 4;
+    // max-width: 1200px;
+    // margin: 20px auto 30px;
 
     .logo {
         height: 52px;
@@ -1961,6 +1961,7 @@ body {
         }
 
         .search-box-history {
+            display: none;
             width: 460px;
             /* height: 267px; */
             background-color: rgba(255, 255, 255, 1);
@@ -1996,17 +1997,33 @@ body {
         height: 40px;
         border-radius: 83px;
         cursor: pointer;
+        display: none;
+
+        .sign-in-already-box {
+            display: none;
+        }
 
         &.sign-in-already {
             background-color: #ffffff;
             font-size: 14px;
             color: #333;
+            .sign-in-already-box {
+                display: flex;
+                align-items: center;
+                justify-content: center;
+                width: 192px;
+                height: 40px;
+            }
 
             .sign-icon {
                 width: 20px;
                 height: 20px;
                 margin-right: 10px;
             }
+
+            .sign-in-no-box {
+                display: none;
+            }
         }
 
         &.sign-in-no {
@@ -2014,6 +2031,15 @@ body {
             z-index: 1;
             padding-right: 8px;
 
+            .sign-in-no-box {
+                display: flex;
+                align-items: center;
+                justify-content: center;
+
+                width: 192px;
+                height: 40px;
+            }
+
             .sign-in-bj {
                 position: absolute;
                 top: 0;
@@ -2095,6 +2121,7 @@ body {
     }
 
     .post-list {
+        display: none;
         .post-item {
             width: 84px;
             height: 34px;