fix: 完善学生端布局与实训页面

src/assets/styles/sidebar.scss

@@ -1016,6 +1016,12 @@
   .main-container {
     margin-left: 180px !important;
   }
+
+  // 收起后侧边栏仅保留 64px 图标轨道，主内容同步释放展开态的空间。
+  &.hideSidebar .main-container {
+    margin-left: 64px !important;
+  }
+
   .sidebar-container {
     width: 180px !important;
   }

src/views/AI/index.vue

@@ -1158,7 +1158,17 @@
             }
           }
           .fbtn {
+            flex: 0 0 auto;
+            min-width: max-content;
+            align-items: center;
+            white-space: nowrap;
+
             .el-button {
+              flex: 0 0 auto;
+              min-width: 5.5rem;
+              padding-right: 1rem;
+              padding-left: 1rem;
+              white-space: nowrap;
               height: 3rem;
             }
           }

src/views/assessment/diagnosis.vue

@@ -1112,8 +1112,7 @@ button.is-disabled {
 
     >div,
     .actions,
-    .diagnosis-materials__actions,
+    .diagnosis-materials__actions {
-    .ab-materials__actions {
         display: flex;
         flex-wrap: wrap;
         gap: 8px;
@@ -1334,41 +1333,6 @@ button.is-disabled {
     }
 }
 
-/* ===== AB 测试资料区 ===== */
-.ab-materials {
-    display: flex;
-    align-items: flex-start;
-    justify-content: space-between;
-    gap: 20px;
-    margin-top: 14px;
-    padding: 12px 14px;
-    border-left: 3px solid var(--student-accent);
-    background: var(--student-accent-soft);
-    border-radius: 0 8px 8px 0;
-    color: var(--student-text-secondary);
-
-    ol {
-        margin: 0;
-        padding-left: 20px;
-        line-height: 1.75;
-        font-size: var(--student-fs-body);
-    }
-
-    &__actions {
-        display: flex;
-        flex-wrap: wrap;
-        flex: 0 0 auto;
-        gap: 8px;
-    }
-}
-
-@media (max-width: 860px) {
-    .ab-materials {
-        align-items: stretch;
-        flex-direction: column;
-    }
-}
-
 /* ===== 上传区 ===== */
 .chart-upload-area,
 .comment-import {

src/views/test/promotion.vue

@@ -330,7 +330,7 @@ import { parseTrainingArray } from "@/views/training/taskKeyMap"
 const TASK_KEY = "promotion-effect-optimization"
 const RELEASE_CHANNEL_TASK_KEY = "release-channel-evaluation"
 const phases = ["冷启动期", "增长期", "稳定期"]
-const channelPositionings = ["内容种草与直间问转化", "承接精准搜索流量", "性价比走量冲销量", "品类心智补充", "发酵老客触达", "清库存促销量", "其他（需要补充填空）"]
+const channelPositionings = ["内容种草与直间问转化", "承接精准搜索流量", "性价比走量冲销量", "品类心智补充", "尝鲜客群触达", "清库存促销量", "其他（需要补充填空）"]
 const strategyPool = [
     ["投放泛流量关键词+测试3-5组不同内容素材，观察点击率确定最优方向", "冷启动期", "抖音"], ["优化商品标题和主图，承接自然搜索流量，暂不开启大规模付费推广", "冷启动期", "天猫"], ["设置低价引流款，报名“新品秒杀”活动，获取初始销量和评价", "冷启动期", "拼多多"],
     ["将冷启动期跑出的TOP2内容素材加大投放，定向场景化标签（如，白领、科技爱好者）", "增长期", "抖音"], ["开启直通车，主推核心大词，截取竞品搜索流量", "增长期", "天猫"], ["参与平台大促活动（如百亿补贴），设置满减券，快速拉升销量", "增长期", "拼多多"],