feat: 支持单位筛选改 el-select 多选 (前端)

manager/Projects.vue 顶部筛选区的「支持单位」从 el-input 升级为 el-select multiple + 远程搜索。

改动:
- L6: el-input → el-select (multiple + filterable + remote + clearable + collapse-tags + collapse-tags-tooltip)
  - v-model: q.sponsorOrgName (string) → q.sponsorAdminUserIds (number[])
  - remote-method: searchSponsorOrgsForFilter (新增)
  - loading: sponsorSearching (新增)
  - width: 260px (比输入框宽, 容纳标签)
- L291: q ref 字段重命名 + 改类型
- L341: reset() 同步
- 新增: sponsorSearching ref (loading 指示)
- 新增: _supporterFilterTimer (filter 防抖, 与 assignForm 的 _supporterTimer 分离)
- 新增: searchSponsorOrgsForFilter(query) — 复用 listSponsorOrgs + sponsorOrgOptions
  - 200ms debounce
  - 已选项不在结果里时按 userId 单独拉回 (multi-select 必须保证每个 tag 都有 label)

未做 / 后续:
- 执行方 (execOrgName) 同样可改多选, 沿用本次模式即可, 暂不动
- q.sponsorOrgName 字段已从源消失, 注释提到「sponsorOrgName」的 _self/manager_projects.md 待同步 (下一 commit)

ry-vue3/src/views/manager/Projects.vue

@@ -3,7 +3,23 @@
     <div class="breadcrumb">首页 / 项目管理</div>
 
     <el-form inline :model="q" class="filter-form">
-        <el-form-item label="支持单位:"><el-input v-model="q.sponsorOrgName" placeholder="输入支持单位名称" clearable /></el-form-item>
+        <el-form-item label="支持单位:">
+          <el-select
+            v-model="q.sponsorAdminUserIds"
+            multiple
+            filterable
+            remote
+            :remote-method="searchSponsorOrgsForFilter"
+            :loading="sponsorSearching"
+            clearable
+            collapse-tags
+            collapse-tags-tooltip
+            placeholder="输入支持单位名称搜索"
+            style="width:260px"
+          >
+            <el-option v-for="o in sponsorOrgOptions" :key="o.userId" :label="o.orgName" :value="o.userId" />
+          </el-select>
+        </el-form-item>
         <el-form-item label="服务机构:"><el-input v-model="q.execOrgName" placeholder="输入服务机构" clearable /></el-form-item>
         <el-form-item label="项目编号:"><el-input v-model="q.projectNo" placeholder="输入项目编号" clearable /></el-form-item>
         <el-form-item label="项目名称:"><el-input v-model="q.projectName" placeholder="输入项目名称" clearable /></el-form-item>
@@ -288,7 +304,7 @@ const userStore = useUserStore()
 const router = useRouter()
 const route = useRoute()
 
-const q = ref({ sponsorOrgName: '', execOrgName: '', projectNo: '', projectName: '', projectForm: '', startTime: '', endTime: '', isFinished: '', isSettled: '', managerScore: '' })
+const q = ref({ sponsorAdminUserIds: [], execOrgName: '', projectNo: '', projectName: '', projectForm: '', startTime: '', endTime: '', isFinished: '', isSettled: '', managerScore: '' })
 const rows = ref([])
 const loading = ref(false)
 const page = reactive({ pageNum: 1, pageSize: 10, total: 0 })
@@ -338,7 +354,7 @@ async function doDelete(row) {
   }
 }
 
-function reset() { q.value = { sponsorOrgName:'', execOrgName:'', projectNo:'', projectName:'', projectForm:'', startTime:'', endTime:'', isFinished:'', isSettled:'', managerScore:'' }; page.pageNum = 1; load() }
+function reset() { q.value = { sponsorAdminUserIds:[], execOrgName:'', projectNo:'', projectName:'', projectForm:'', startTime:'', endTime:'', isFinished:'', isSettled:'', managerScore:'' }; page.pageNum = 1; load() }
 
 // 导出
 function exportProjects() { ElMessage.info('导出项目功能开发中') }
@@ -627,7 +643,10 @@ const assignForm = reactive({
   deadlineDays: 30
 })
 const sponsorOrgOptions = ref([])
+const sponsorSearching = ref(false)
 let _supporterTimer = null
+let _supporterFilterTimer = null
+
 
 // 已分配场次合计 (实时)
 const assignedSessions = computed(() =>
@@ -701,6 +720,33 @@ async function loadSponsorOrgs(query) {
 
 function searchSponsorOrgs(q) { loadSponsorOrgs(q) }
 
+// 顶部筛选区远程搜索 (多选 el-select, 复用 sponsorOrgOptions, 加 loading + 已选项重拉回)
+function searchSponsorOrgsForFilter(query) {
+  if (_supporterFilterTimer) clearTimeout(_supporterFilterTimer)
+  sponsorSearching.value = true
+  _supporterFilterTimer = setTimeout(async () => {
+    try {
+      const params = {}
+      if (query) params.orgName = query
+      const r = await listSponsorOrgs(params)
+      sponsorOrgOptions.value = r.data || []
+      // 已选项不在结果里时按 userId 单独拉回 (multi-select 必须保证每个已选 tag 都有 label)
+      const ids = q.value.sponsorAdminUserIds || []
+      for (const uid of ids) {
+        if (!sponsorOrgOptions.value.find(u => u.userId === uid)) {
+          const r2 = await listSponsorOrgs({ userId: uid })
+          const sel = (r2.data || []).find(u => u.userId === uid)
+          if (sel) sponsorOrgOptions.value = [sel, ...sponsorOrgOptions.value]
+        }
+      }
+    } catch (e) {
+      sponsorOrgOptions.value = []
+    } finally {
+      sponsorSearching.value = false
+    }
+  }, 200)
+}
+
 // 选中支持方后回填 user_name (缓存到 biz_project.sponsor_admin_user_name)
 function onSponsorOrgPick(userId) {
   const u = sponsorOrgOptions.value.find(x => x.userId === userId)