fix(回忆复习)：标准导图面板展示标注树

对比完成后，标准导图面板之前一直使用原始 standardTree，
MATCHED/MISSED 标注只出现在独立的「对比结果」区域。
用户期望在标准导图中也能直观看到哪些节点命中/遗漏。

修复：有 compareTree 时标准导图改用标注树并开启 colorByCompare，
无对比结果时回退到原始 standardTree

src/components/ReviewRecall.vue

@@ -411,7 +411,13 @@ onMounted(() => {
           <span>来源：{{ standard.generator }}</span>
           <span>参考：{{ standard.sourceReportCount }} 份报告 + {{ standard.sourceFragmentCount }} 份残片</span>
         </div>
-        <MindMapViewer v-if="standardTree" :tree="standardTree" height="60vh" @node-click="goToNodeSource" />
+        <MindMapViewer
+          v-if="standardTree"
+          :tree="compareTree || standardTree"
+          :color-by-compare="!!compareTree"
+          height="60vh"
+          @node-click="goToNodeSource"
+        />
         <pre v-else class="standard-outline">{{ standard.outline || standard.content }}</pre>
         <p v-if="standard.summary" class="generator-info">{{ standard.summary }}</p>
       </div>