diff --git a/src/components/marking/components/renderer/DomImageRenderer.vue b/src/components/marking/components/renderer/DomImageRenderer.vue
index bdda0f1..9da58ad 100644
--- a/src/components/marking/components/renderer/DomImageRenderer.vue
+++ b/src/components/marking/components/renderer/DomImageRenderer.vue
@@ -27,6 +27,7 @@ const props = withDefaults(defineProps<Props>(), {
 
 const emit = defineEmits<{
   'layer-ready': [layerManager: ReturnType<typeof useSimpleDomLayer>]
+  'preview': []
 }>()
 
 // 图片的自然尺寸
@@ -360,6 +361,19 @@ onMounted(async () => {
       }"
     />
 
+    <!-- 预览按钮 -->
+    <view
+      class="absolute right-2 top-2 z-20 flex items-center justify-center rounded-full bg-black/50"
+      :style="{
+        width: '32px',
+        height: '32px',
+        pointerEvents: 'auto',
+      }"
+      @click.stop="emit('preview')"
+    >
+      <text class="text-white" :style="{ fontSize: '16px' }">🔍</text>
+    </view>
+
     <!-- 标记层容器 -->
     <view
       class="absolute left-0 top-0"
diff --git a/src/components/marking/components/renderer/QuestionRenderer.vue b/src/components/marking/components/renderer/QuestionRenderer.vue
index d16ae11..8edf301 100644
--- a/src/components/marking/components/renderer/QuestionRenderer.vue
+++ b/src/components/marking/components/renderer/QuestionRenderer.vue
@@ -182,6 +182,19 @@ function handleScoreDelete(value: number) {
   }
 }
 
+/**
+ * 处理图片预览
+ */
+function handlePreview(imageIndex: number) {
+  const urls = props.question.imageUrls
+  if (!urls?.length) return
+
+  uni.previewImage({
+    urls,
+    current: urls[imageIndex],
+  })
+}
+
 /**
  * 处理文本输入
  */
@@ -358,6 +371,7 @@ defineExpose({
           :on-score-delete="handleScoreDelete"
           @layer-ready="(manager) => handleLayerReady(imageIndex, manager)"
           @quick-score="handleQuickScore"
+          @preview="handlePreview(imageIndex)"
         />
 
         <!-- 第一个图片显示分数 -->
diff --git a/src/tabbar/index.vue b/src/tabbar/index.vue
index a2c7895..4d4bbdd 100644
--- a/src/tabbar/index.vue
+++ b/src/tabbar/index.vue
@@ -69,6 +69,16 @@ onLoad(() => {
     },
   })
 })
+
+// 每次页面显示时，根据当前路径自动同步 tabbar 选中状态
+onShow(() => {
+  const pages = getCurrentPages()
+  const currentPage = pages[pages.length - 1]
+  if (currentPage?.route) {
+    // route 不带前导斜杠，与 pagePath 格式一致
+    tabbarStore.setAutoCurIdx(currentPage.route)
+  }
+})
 const activeColor = '#1890ff'
 const inactiveColor = '#666'
 function getColorByIndex(index: number) {