fix(aihr): harden broadcast and mobile assistant flows

mobile-uni/src/pages/user/practice/index.vue

@@ -373,7 +373,7 @@
 
     <view v-if="result" class="result-actions">
       <button class="secondary-button" @click="openPracticeHistory">查看训练记录</button>
-      <button class="primary-button" @click="start(selectedScenarioId)">再练一次</button>
+      <button class="primary-button tabbar-safe-action" @click="start(selectedScenarioId)">再练一次</button>
     </view>
   </view>
 </template>
@@ -1443,6 +1443,7 @@ const finish = async (force = false) => {
     const nextResult = await finishPractice(sessionId.value, assignmentId);
     if (!requests.isCurrent(request)) return;
     result.value = nextResult;
+    resetPageScroll();
     status.value = 'finished';
     message.value = '训练完成，主管端待复盘已更新';
     completedAssignmentId.value = assignmentId;