feat(download): 对已丢失的历史APK显示"无法下载"而非死链

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tenant-platform/src/api/update.ts

@@ -245,6 +245,7 @@ export interface DownloadPageHistoryItem {
   versionName: string
   versionCode: number
   downloadUrl?: string
+  available: boolean
   changeLog?: string
   publishedAt: string
   current: boolean
@@ -254,6 +255,7 @@ export interface DownloadPageAppInfo {
   versionName: string
   versionCode: number
   downloadUrl?: string
+  available?: boolean
   changeLog?: string
   storeUrl?: string
   storeLinks?: Record<string, string>

tenant-platform/src/views/download/DownloadView.vue

@@ -19,6 +19,10 @@
               class="btn btn-primary"
               :href="section.info.downloadUrl"
             >立即安装</a>
+            <span
+              v-else-if="section.key === 'android' && section.info.available === false"
+              class="btn btn-disabled"
+            >无法下载</span>
 
             <a
               v-if="section.key !== 'android' && section.info.storeUrl"
@@ -64,6 +68,7 @@
                   <span v-if="item.publishedAt" class="history-date">{{ formatDate(item.publishedAt) }}</span>
                 </div>
                 <a v-if="item.downloadUrl" class="btn btn-secondary btn-small" :href="item.downloadUrl">下载</a>
+                <span v-else class="btn btn-disabled btn-small">无法下载</span>
               </div>
             </div>
           </div>
@@ -268,6 +273,12 @@ onMounted(async () => {
   color: #333;
 }
 
+.btn-disabled {
+  background: #f0f2f5;
+  color: #bbb;
+  cursor: not-allowed;
+}
+
 .other-links {
   margin-top: 12px;
   font-size: 13px;