增加自然语言状态摘要

web/src/views/DashboardView.vue

@@ -66,6 +66,7 @@ interface DashboardGreeting {
   title: string
   subtitle: string
   label: string
+  narrative: string
   insights: Array<{
     label: string
     value: string
@@ -465,6 +466,8 @@ onMounted(async () => {
         </div>
       </section>
 
+      <p class="greeting-narrative">{{ data.greeting.narrative }}</p>
+
       <section class="overview-metrics" aria-label="关键教学数据">
         <button
           v-for="metric in adminMetrics"
@@ -652,6 +655,14 @@ onMounted(async () => {
 .greeting-insight strong { color: var(--dashboard-navy); font-size: 20px; }
 .greeting-insight small { overflow: hidden; color: #84909d; font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
 
+.greeting-narrative {
+  margin: -7px 0 0;
+  padding: 0 3px;
+  color: #526078;
+  font-size: 12px;
+  line-height: 1.7;
+}
+
 .overview-hero::after {
   content: "";
   position: absolute;