feat(aigc): add shared work top bar and back fixes

- add leftAction prop to AigcTopBar to switch between back arrow and home icon
- pass source=sharedWork query param when reLaunching home from shared work page
- update home page to detect shared work source, adjust top bar and back behavior
- add CSS styling for home top bar icon
- update root page back handler to exit WeChat mini program

src/components/TopNavBar/index.vue

@@ -152,6 +152,17 @@ const hasBackListener = computed(() => {
 
 // 处理返回事件
 const handleBack = () => {
+  const pages = getCurrentPages();
+
+  if (pages.length <= 1) {
+    // #ifdef MP-WEIXIN
+    if (typeof wx !== "undefined" && typeof wx.exitMiniProgram === "function") {
+      wx.exitMiniProgram();
+      return;
+    }
+    // #endif
+  }
+
   if (hasBackListener.value) {
     emit("back");
     return;

src/pages-aigc/components/AigcTopBar/index.vue

@@ -2,7 +2,9 @@
   <view class="aigc-topbar" :style="topbarStyle">
     <view class="aigc-nav-row">
       <view class="aigc-topbar-back" @tap="emit('back')">
-        <uni-icons class="aigc-back-icon" fontFamily="znicons" size="22" color="#172033">
+        <uni-icons v-if="leftAction === 'home'" class="aigc-back-icon is-home" type="home-filled" size="20"
+          color="#172033" />
+        <uni-icons v-else class="aigc-back-icon" fontFamily="znicons" size="22" color="#172033">
           {{ zniconsMap["zn-nav-arrow-left"] }}
         </uni-icons>
       </view>
@@ -43,6 +45,11 @@ const props = defineProps({
     type: Boolean,
     default: true,
   },
+  leftAction: {
+    type: String,
+    default: "back",
+    validator: (value) => ["back", "home"].includes(value),
+  },
 });
 
 const emit = defineEmits(["back", "history", "recharge"]);

src/pages-aigc/components/AigcTopBar/styles/index.scss

@@ -48,6 +48,10 @@
   transform: translateX(-1px);
 }
 
+.aigc-back-icon.is-home {
+  transform: none;
+}
+
 .aigc-topbar-actions {
   flex: 1 1 auto;
   width: auto;

src/pages-aigc/home/home.vue

@@ -1,6 +1,7 @@
 <template>
   <view class="aigc-home-page">
-    <AigcTopBar :points="pointBalance" @back="handleBack" @history="handleHistory" @recharge="handleRecharge" />
+    <AigcTopBar :points="pointBalance" :left-action="isSharedWorkEntry ? 'home' : 'back'" @back="handleBack"
+      @history="handleHistory" @recharge="handleRecharge" />
 
     <view class="aigc-home-browser">
       <GiftPointsToast :visible="giftToastVisible" @close="handleCloseGiftToast" />
@@ -38,6 +39,7 @@ import FlowSteps from "./components/FlowSteps/index.vue";
 const { pointBalance, fetchCurrentCredit } = useCurrentCredit();
 const activeIndex = ref(0);
 const aigcConsentVisible = ref(false);
+const isSharedWorkEntry = ref(false);
 const giftToastVisible = ref(!getAigcGiftPointsToastClosed());
 const templates = ref([]);
 const steps = ["选模板", "传素材", "添积分", "出结果"];
@@ -54,7 +56,8 @@ const fetchTemplateList = async () => {
   }
 };
 
-onLoad(() => {
+onLoad((query = {}) => {
+  isSharedWorkEntry.value = query.source === "sharedWork";
   aigcConsentVisible.value = !getAigcConsentAgreed();
   fetchTemplateList();
 });
@@ -64,6 +67,13 @@ onShow(() => {
 });
 
 const handleBack = () => {
+  if (isSharedWorkEntry.value) {
+    uni.reLaunch({
+      url: "/pages/index/index"
+    });
+    return;
+  }
+
   const pages = getCurrentPages();
   if (pages.length > 1) {
     uni.navigateBack();

src/pages-aigc/sharedWork/sharedWork.vue

@@ -100,7 +100,7 @@ onLoad((query = {}) => {
 
 const openAigcHome = () => {
   uni.reLaunch({
-    url: "/pages-aigc/home/home",
+    url: "/pages-aigc/home/home?source=sharedWork",
     fail: () => showToast("打开模板列表失败"),
   });
 };