feat: 修改返回按钮

frontend/pages/ai-dazi/index.vue

@@ -5,7 +5,7 @@
 
 		<!-- 左上角关闭按钮 -->
 		<view class="close-btn" @click="handleClose">
-			<image class="nav-back-icon" src="/static/icon/back.png" mode="aspectFit"></image>
+			<text class="back-icon" :style="{ color: backIconColor }">←</text>
 		</view>
 
 		<!-- 功能按钮区域 -->
@@ -144,17 +144,8 @@ const handleAdd = () => {
 
 /* 关闭按钮 */
 .close-btn {
-	position: absolute;
-	top: 60rpx;
-	left: 30rpx;
-	z-index: 100;
-	width: 80rpx;
-	height: 80rpx;
-	/* border-radius: 50%; */
-	display: flex;
-	align-items: center;
-	justify-content: center;
-	/* border: 3rpx solid rgba(255, 255, 255, 0.6); */
+	font-size: 48rpx;
+	font-weight: bold;
 }
 
 .nav-back-icon {

frontend/pages/components/CastloveContent.vue

@@ -8,7 +8,7 @@
 
 		<!-- 左上角返回按钮 -->
 		<view class="back-button" :style="{ top: backButtonTop }" @click="handleBack">
-			<image class="back-icon" src="/static/icon/back.png" mode="aspectFit" />
+			<text class="back-icon">←</text>
 		</view>
 
 		<!-- 内容区域 -->
@@ -443,8 +443,8 @@ const handleBack = () => {
 }
 
 .back-icon {
-	width: 64rpx;
-	height: 64rpx;
+	font-size: 48rpx;
+	font-weight: bold;
 }
 
 .content-wrapper {

frontend/pages/discover/discover.vue

@@ -2,7 +2,7 @@
 	<view class="discover-container">
 		<!-- 左上角返回按钮 -->
 		<view class="back-button" @click="handleBack">
-			<image class="back-icon" src="/static/icon/back.png" mode="aspectFit" />
+			<text class="back-icon" >←</text>
 		</view>
 
 		<!-- 内容区域 -->
@@ -324,8 +324,8 @@ onUnmounted(() => {
 }
 
 .back-icon {
-	width: 64rpx;
-	height: 64rpx;
+	font-size: 48rpx;
+	font-weight: bold;
 }
 
 .content-wrapper {

frontend/pages/profile/hisWorks.vue

@@ -6,7 +6,7 @@
 		<!-- 顶部导航 -->
 		<view class="nav-bar">
 			<view class="nav-back" @tap="goBack">
-				<image class="nav-back-icon" src="/static/icon/back.png" mode="aspectFit"></image>
+				<text class="nav-back-icon">←</text>
 			</view>
 			<text class="nav-title">{{ nickname }}的作品</text>
 			<view class="nav-placeholder"></view>
@@ -359,8 +359,8 @@ onUnmounted(() => {
 }
 
 .nav-back-icon {
-	width: 80rpx;
-	height: 80rpx;
+	font-size: 48rpx;
+	font-weight: bold;
 }
 
 .nav-title {

frontend/pages/profile/myWorks.vue

@@ -6,7 +6,7 @@
 		<!-- 顶部导航 -->
 		<view class="nav-bar">
 			<view class="nav-back" @tap="goBack">
-				<image class="nav-back-icon" src="/static/icon/back.png" mode="aspectFit"></image>
+				<text class="nav-back-icon">←</text>
 			</view>
 			<!-- <text class="nav-title">我的作品</text> -->
 			<view class="nav-placeholder"></view>
@@ -1017,8 +1017,8 @@ onShow(() => {
 }
 
 .nav-back-icon {
-	width: 80rpx;
-	height: 80rpx;
+	font-size: 48rpx;
+	font-weight: bold;
 }
 
 .nav-title {

frontend/pages/tasks/daily-tasks.vue

@@ -21,7 +21,7 @@
 						<!-- 返回按钮 -->
 						<view class="back-button" @touchstart.stop="handleCloseTouchStart"
 							@touchend.stop="handleCloseTouchEnd" @click="handleCloseClick">
-							<image class="back-icon" src="/static/icon/back.png" mode="aspectFit" />
+							<text class="back-icon">←</text>
 						</view>
 
 						<!-- Tab 切换 -->
@@ -572,8 +572,8 @@ const handleCloseClick = (e) => {
 }
 
 .back-icon {
-	width: 64rpx;
-	height: 64rpx;
+	font-size: 48rpx;
+	font-weight: bold;
 }
 
 /* Tab 样式 */