style(frontend): 全站背景图 webp 化(bg.jpg 4MB→251KB 压缩 + bg.webp)＋品牌工具页默认策略调优（品牌检测默认改精确匹配 Simple、Terms 后置）＋任务面板/登录页/亚马逊控制台观感微调

frontend-vue/src/pages/amazon/components/AmazonTopBar.vue

@@ -1,5 +1,7 @@
 <template>
   <header class="amazon-top">
+    <router-link class="home-back" :to="homeHref" title="返回首页">← 返回首页</router-link>
+
     <router-link class="brand" :to="toolbarHref" title="返回工具台首页">
       <span class="brand-logo">富</span>
       <span class="brand-text">
@@ -28,9 +30,7 @@
 
     <div class="top-right">
       <BrandApiSecretSettingsButton variant="topbar" />
-      <router-link class="help-btn" :to="workHref" title="采集工作台">⚙</router-link>
-      <span class="help-btn" title="如需支持请点击底部BUG登记系统">?</span>
-      <span class="admin-chip"><span class="admin-badge">AD</span>{{ username }}</span>
+      <span class="admin-name">{{ username }}</span>
     </div>
   </header>
 </template>
@@ -62,8 +62,8 @@ const username = ref('admin')
 
 /** 分类 tab 点击回到工具台对应分组 */
 const toolbarHref = resolvePageHref('/new_web_source/amazon-console.html')
-/** ⚙ 采集工作台：直达现有真实功能页（对齐 gemini-code 顶栏 ⚙ 入口） */
-const workHref = resolvePageHref('/new_web_source/collect-data.html')
+/** 返回桌面入口首页（亚马逊/视频/图片入口） */
+const homeHref = resolvePageHref('/new_web_source/home.html')
 
 function onTabClick(key: 'front' | 'ops' | 'logi') {
   emit('change', key)
@@ -114,6 +114,27 @@ onMounted(async () => {
   text-decoration: none;
 }
 
+/* 返回首页按钮（顶栏最左，入口页见 DesktopHomePage） */
+.home-back {
+  flex-shrink: 0;
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  padding: 6px 14px;
+  border: 1px solid #3e4a62;
+  border-radius: 6px;
+  color: #c8d2e2;
+  font-size: 13px;
+  text-decoration: none;
+  white-space: nowrap;
+  transition: all 0.2s;
+}
+
+.home-back:hover {
+  background: #2b3447;
+  color: #f5f8fc;
+}
+
 .brand-logo {
   display: flex;
   align-items: center;
@@ -161,11 +182,11 @@ onMounted(async () => {
   display: flex;
   flex-direction: column;
   align-items: center;
-  width: 140px;
-  height: 42px;
+  width: 150px;
+  height: 44px;
   background: transparent;
   color: #c8d2e2;
-  font-size: 13px;
+  font-size: 15px;
   font-weight: 700;
   text-decoration: none;
   transition: all 0.2s;
@@ -175,7 +196,7 @@ onMounted(async () => {
   display: flex;
   align-items: center;
   gap: 8px;
-  padding: 6px 14px;
+  padding: 7px 14px;
   border-radius: 8px;
   transition: background 0.2s;
 }
@@ -194,8 +215,8 @@ onMounted(async () => {
 }
 
 .cat-dot {
-  width: 8px;
-  height: 8px;
+  width: 9px;
+  height: 9px;
   border-radius: 50%;
   flex-shrink: 0;
 }
@@ -204,11 +225,11 @@ onMounted(async () => {
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  padding: 1px 7px;
+  padding: 1px 8px;
   border-radius: 12px;
   background: #343f55;
   color: #a0acbe;
-  font-size: 10px;
+  font-size: 11px;
   font-weight: 700;
 }
 
@@ -230,47 +251,13 @@ onMounted(async () => {
   flex-shrink: 0;
 }
 
-.help-btn {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  min-width: 22px;
-  height: 22px;
+.admin-name {
   color: #c8d2e2;
-  font-size: 16px;
-  font-weight: 700;
-  text-decoration: none;
-  cursor: pointer;
-  padding: 4px 8px;
-}
-
-.help-btn:hover {
-  color: #f5f8fc;
-}
-
-.admin-chip {
-  display: inline-flex;
-  align-items: center;
-  gap: 8px;
-  color: #c8d2e2;
-  font-size: 12px;
+  font-size: 13px;
   font-weight: 700;
   white-space: nowrap;
 }
 
-.admin-badge {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  min-width: 22px;
-  height: 20px;
-  padding: 0 4px;
-  background: #2a6b4f;
-  color: #ffffff;
-  font-size: 10px;
-  font-weight: 700;
-}
-
 @media (max-width: 1100px) {
   .amazon-top {
     flex-wrap: wrap;