fix: use backend API for issuing authority search, keep 5 hardcoded buttons for quick selection

src/components/FilterPanel.vue

@@ -88,7 +88,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted, computed, watch } from 'vue'
+import { ref, watch } from 'vue'
 import { getIssuingAuthorities } from '@/api/retrieval'
 
 interface Authority {
@@ -99,36 +99,19 @@ interface Authority {
 
 const docTypes = ['全部', '法规制度', '技术标准', '操作指南', '通知公告', '工作报告']
 
-// 所有发布单位（从后端 API 获取）
-const allAuthorities = ref<Authority[]>([])
-const authoritiesLoading = ref(false)
+// 写死的常用发布单位（按钮展示）
+const FIXED_AUTHORITIES: string[] = [
+  '中华人民共和国住房和城乡建设部',
+  '中华人民共和国交通运输部',
+  '中华人民共和国建设部',
+  '中华人民共和国国家质量监督检验检疫总局',
+  '中国国家标准化管理委员会',
+]
 
-// 加载全部发布单位（无关键词，取前50个）
-async function loadAuthorities(keyword = '') {
-  authoritiesLoading.value = true
-  try {
-    const res = await getIssuingAuthorities(keyword)
-    const items = (res.data?.authorities || []) as Array<{ full_name: string; count: number }>
-    allAuthorities.value = items.slice(0, 50).map((a) => ({
-      shortName: a.full_name.length > 12 ? a.full_name.substring(0, 12) + '…' : a.full_name,
-      fullName: a.full_name,
-      count: a.count,
-    }))
-  } catch (e) {
-    console.warn('[FilterPanel] 加载发布单位失败:', e)
-    allAuthorities.value = []
-  } finally {
-    authoritiesLoading.value = false
-  }
-}
-
-// 前5发布单位（用于按钮展示）
-const topAuthorities = computed(() => allAuthorities.value.slice(0, 5))
-
-// 页面加载时获取发布单位列表
-onMounted(() => {
-  loadAuthorities('')
-})
+// 按钮展示用：固定5个
+const topAuthorities = ref<Authority[]>(
+  FIXED_AUTHORITIES.map((name) => ({ shortName: name, fullName: name, count: 0 }))
+)
 
 const props = defineProps<{
   docType: string