新增使用说明文档入口

src/components/layout/AppSidebar.vue

@@ -1,5 +1,7 @@
 <script setup lang="ts">
 import {
+  ExternalLink,
+  FileQuestion,
   PenLine,
   Search,
 } from "@lucide/vue";
@@ -139,6 +141,18 @@ function searchConversations() {
       </div>
     </section>
 
+    <a
+      class="help-document"
+      href="https://alidocs.dingtalk.com/i/nodes/dpYLaezmVNZ9EBwXuKGavoNvVrMqPxX6?utm_scene=person_space"
+      target="_blank"
+      rel="noopener noreferrer"
+      title="打开使用说明文档"
+    >
+      <FileQuestion :size="15" />
+      <span>使用说明文档</span>
+      <ExternalLink :size="12" class="help-document__external" />
+    </a>
+
     <footer>
       <div class="knowledge-progress"><i></i></div>
       <p>{{ roleLabel(user?.role) }} · 知识库 2,448 / 3,000 条</p>
@@ -332,8 +346,35 @@ section h2 {
   font-weight: 700;
 }
 
-footer {
+.help-document {
+  display: flex;
+  min-height: 38px;
+  align-items: center;
+  gap: 8px;
+  border-top: 1px solid var(--color-border-light);
   margin-top: auto;
+  padding: 0 16px;
+  color: var(--color-text-secondary);
+  font-size: 12px;
+  text-decoration: none;
+}
+
+.help-document:hover {
+  background: var(--color-bg-warm);
+  color: var(--color-text);
+}
+
+.help-document span {
+  min-width: 0;
+  flex: 1;
+}
+
+.help-document__external {
+  color: var(--color-text-faint);
+}
+
+footer {
+  margin-top: 0;
   border-top: 1px solid var(--color-border-light);
   padding: 12px 16px;
 }
@@ -380,6 +421,8 @@ footer p {
   .conversation-search,
   .sidebar-item__label,
   .new-label,
+  .help-document span,
+  .help-document__external,
   footer {
     display: none;
   }
@@ -389,6 +432,13 @@ footer p {
     padding: 0;
   }
 
+  .help-document {
+    min-height: 42px;
+    justify-content: center;
+    margin-top: auto;
+    padding: 0;
+  }
+
   .risk-dot {
     width: 7px;
     height: 7px;