fix(mobile): preserve assistant IDs and scope state

mobile-uni/src/pages/user/assistant/item.vue

@@ -34,8 +34,9 @@ import { ref } from 'vue';
 import { onLoad } from '@dcloudio/uni-app';
 import type { PersonalItem, PersonalItemSourceType, PersonalItemStatus } from '@/types/api';
 import { deletePersonalItem, downloadPersonalItem, loadPersonalItem, retryPersonalItem } from '@/services/personal-assistant';
+import { normalizeBackendId } from '@/services/personal-assistant-id';
 
-const itemId = ref(0); const item = ref<PersonalItem>(); const loading = ref(false); const busy = ref(false); const message = ref('');
+const itemId = ref(''); const item = ref<PersonalItem>(); const loading = ref(false); const busy = ref(false); const message = ref('');
 const statusText = (status: PersonalItemStatus) => ({ QUEUED: '等待处理', PARSING: '解析中', READY: '可检索', FAILED: '解析失败', DELETING: '删除中', DELETED: '已删除' })[status];
 const statusDescription = (status: PersonalItemStatus) => ({ QUEUED: '已进入解析队列。', PARSING: '正在提取正文和建立搜索索引。', READY: '已完成解析，可用于个人助理问答。', FAILED: '本次解析失败，可查看公开原因后重试。', DELETING: '正在清理附件、正文和索引。', DELETED: '资料已删除。' })[status];
 const sourceText = (source: PersonalItemSourceType) => ({ TEXT: '文字', FILE: '文件', URL: '外部网页' })[source];
@@ -45,7 +46,14 @@ const download = async () => { busy.value = true; try { const result = await dow
 const confirmDelete = () => uni.showModal({ title: '确认删除资料', content: '附件、解析正文和搜索索引会清除，删除后无法恢复。', confirmText: '确认删除', confirmColor: '#e70014', success: (result) => { if (result.confirm) void remove(); } });
 const remove = async () => { busy.value = true; message.value = ''; try { await deletePersonalItem(itemId.value); uni.redirectTo({ url: '/pages/user/assistant/library' }); } catch (error) { message.value = error instanceof Error ? error.message : '删除失败，请重试'; } finally { busy.value = false; } };
 const goBack = () => uni.navigateBack();
-onLoad((options) => { itemId.value = Number(options?.id || 0); if (!Number.isSafeInteger(itemId.value) || itemId.value <= 0) message.value = '资料不存在或无权访问'; else void load(); });
+onLoad((options) => {
+  try {
+    itemId.value = normalizeBackendId(String(options?.id || ''));
+    void load();
+  } catch {
+    message.value = '资料不存在或无权访问';
+  }
+});
 </script>
 
 <style scoped>