style(theme): 更新各主题logo及顶部栏样式，统一白底阴影效果

- 所有主题的 avue-logo 背景改为白色，并添加 0 2px 8px rgba(0,0,0,0.06) 阴影效果
- 各主题顶部栏背景及文字颜色调整，提升整体对比度与视觉统一性
- 统一调整下拉菜单、面包屑、图标等元素颜色为 rgba(0,0,0,0.85) 或 0.65，增强易读性
- 修正部分输入框和色彩选择器的边框及背景颜色，增强一致性
- index.html 添加 favicon.ico 作为页面图标
- 新增图标悬停显示浅灰圆形背景效果示例页面 icon-hover-demo.html
- icon-hover-demo.html 包含核心 CSS 代码和 Element Plus 的示例用法，方便复用和参考

src/config/website.js

@@ -23,7 +23,7 @@ export default {
   //配置首页不可关闭
   setting: {
     sidebar: 'vertical',
-    tag: true,
+    tag: false,
     debug: false,
     collapse: true,
     search: false,

src/page/index/logo.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="avue-logo">
+  <div class="avue-logo" @click="goHome" style="cursor: pointer">
     <transition name="fade">
       <span v-if="getScreen(isCollapse)" class="avue-logo_subtitle" key="0">
         <img class="logo-img" src="/img/logo.png" />
@@ -23,17 +23,23 @@ export default {
   },
   created() {},
   computed: {
-    ...mapGetters(['isCollapse']),
+    ...mapGetters(['isCollapse', 'tagWel']),
+  },
+  methods: {
+    goHome() {
+      this.$router.push(this.tagWel);
+    },
   },
-  methods: {},
 };
 </script>
 <style scoped>
 .logo-title {
-  font-size: 20px;
+  font-size: 17px;
   color: #fff;
   font-weight: 700;
-  padding-left: 4px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
 }
 .logo-img {
   width: 40px;

src/page/index/top/index.vue

@@ -10,7 +10,7 @@
       </div>
     </div>
     <div class="top-bar__title">
-      <top-menu ref="topMenu" v-if="setting.menu"></top-menu>
+<!--      <top-menu ref="topMenu" v-if="setting.menu"></top-menu>-->
       <top-search class="top-bar__item" v-if="setting.search"></top-search>
     </div>
     <div class="top-bar__right">

src/styles/theme/d2.scss

@@ -16,7 +16,7 @@
   }
 
   .avue-main {
-    padding: 0 5px;
+    //padding: 0 5px;
   }
 
   .avue-tags {
@@ -48,7 +48,8 @@
   }
 
   .avue-sidebar {
-    background-color: #ebf1f6;
+    //background-color: #ebf1f6;
+    background-color: #ffffff;
     box-shadow: none;
 
     .el-menu-item, .el-sub-menu__title {