refactor: simplify TopNavBar and update sharedWork back handling

remove leftAction prop and hardcode left icon type in TopNavBar
move home navigation logic out of TopNavBar to parent components
update sharedWork.vue to use new TopNavBar API and implement proper back handling

src/components/TopNavBar/index.vue

@@ -4,13 +4,10 @@
     <view :style="{ height: statusBarHeight + 'px' }" v-if="!hideStatusBar"></view>
 
     <!-- 导航栏内容 -->
-    <view
-      class="flex flex-items-center flex-justify-between border-box pl-8 pr-8"
-      :style="navContentStyle"
-    >
-      <!-- 左侧导航按钮 -->
+    <view class="flex flex-items-center flex-justify-between border-box pl-8 pr-8" :style="navContentStyle">
+      <!-- 左侧返回按钮 -->
       <view class="nav-bar-left flex flex-items-center flex-justify-center" v-if="showBack" @click="handleBack">
-        <uni-icons :type="leftIconType" size="20" :color="backIconColor" />
+        <uni-icons type="left" size="20" :color="backIconColor" />
       </view>
 
       <!-- 中间标题区域 -->
@@ -53,12 +50,6 @@ const props = defineProps({
     type: Boolean,
     default: true,
   },
-  // 左侧按钮行为
-  leftAction: {
-    type: String,
-    default: "back",
-    validator: (value) => ["back", "home"].includes(value),
-  },
   // 背景颜色
   background: {
     type: String,
@@ -154,8 +145,6 @@ const navContentStyle = computed(() => {
   };
 });
 
-const leftIconType = computed(() => (props.leftAction === "home" ? "home-filled" : "left"));
-
 const hasBackListener = computed(() => {
   const vnodeProps = instance?.vnode?.props || {};
   return Boolean(vnodeProps.onBack);
@@ -167,14 +156,6 @@ const handleBack = () => {
     emit("back");
     return;
   }
-
-  if (props.leftAction === "home") {
-    uni.reLaunch({
-      url: "/pages/index/index",
-    });
-    return;
-  }
-
   // 如果没有监听back事件，默认执行返回上一页
   uni.navigateBack({
     delta: 1,

src/pages-aigc/sharedWork/sharedWork.vue

@@ -1,17 +1,15 @@
 <template>
   <view class="shared-work-page">
     <view class="shared-work-nav">
-      <TopNavBar :title="shareDetail?.templateName || '旅行作品'" background="#fff" title-color="#173a5f"
-        back-icon-color="#173a5f" left-action="home" :align-with-menu-button="true" :z-index="3"
-        @back="openAppHome" />
+      <TopNavBar :title="shareDetail.templateName || '旅行作品'" background="#fff" title-color="#173a5f"
+        back-icon-color="#173a5f" :align-with-menu-button="true" :z-index="3" @back="handleBack" />
     </view>
 
     <view class="shared-work-scroll">
       <template v-if="shareDetail">
-        <video v-if="isVideo" class="shared-work-media is-video" :src="videoResultUrl"
-          :poster="imageResultUrl" controls object-fit="cover" />
-        <image v-else-if="imageResultUrl" class="shared-work-media" :src="imageResultUrl"
-          mode="aspectFill" />
+        <video v-if="isVideo" class="shared-work-media is-video" :src="videoResultUrl" :poster="imageResultUrl" controls
+          object-fit="cover" />
+        <image v-else-if="imageResultUrl" class="shared-work-media" :src="imageResultUrl" mode="aspectFill" />
 
         <view class="shared-work-meta">
           <text class="shared-work-title">{{ shareDetail.templateName || "旅行作品" }}</text>
@@ -107,11 +105,14 @@ const openAigcHome = () => {
   });
 };
 
-const openAppHome = () => {
-  uni.reLaunch({
-    url: "/pages/index/index",
-    fail: () => showToast("打开首页失败"),
-  });
+const handleBack = () => {
+  const pages = getCurrentPages();
+  if (pages.length > 1) {
+    uni.navigateBack();
+    return;
+  }
+
+  openAigcHome();
 };
 
 const handleCreateOwn = async () => {