refactor: 合并 biz_support_unit/biz_execution_unit/biz_service_org 为 biz_org, 删除 2 张孤儿表, 改 biz_person.work_unit → org_id FK

主要改动:
- SQL: biz_support_unit → biz_org, 加 org_type, 加 business_nature; 删 biz_execution_unit, biz_service_org
- SQL: biz_project.support_unit_id/name + service_org_id/name → org_id/name/type
- SQL: biz_meeting.support_unit_name → org_name
- SQL: biz_person.work_unit → org_id (FK)
- 后端: 新 BizOrg entity/mapper/service/controller
- 后端: BizProject/BizMeeting 字段重命名
- 后端: 删 12 个 BizSupportUnit/BizExecutionUnit/BizServiceOrg Java 文件
- 后端: BizPersonImportVO.workUnit → orgName (导入时查 biz_org 取 org_id)
- 后端: BizAuthController.registerExecutor 完整实现 (原 registerSupplier stub)
- 前端: 新 admin/Orgs.vue + manager/Orgs.vue (原 SupportUnits)
- 前端: RegisterExecutor.vue (原 RegisterSupplier, 单页 2 步)
- 前端: sponsor/executor/manager 多个文件 workUnit → orgId/orgName 重命名
- 前端: 统一 supplier → executor, 业务命名 sponsor(赞助方) / executor(执行方=供应商)
- 前端: 全工程 execution → executor (company type / role / person unit_type)

ry-vue3/src/views/portal/SupportLetter.vue

@@ -0,0 +1,106 @@
+<template>
+  <div class="portal-support-letter">
+    <h1 class="page-title">支持函</h1>
+    <p class="page-sub">查看项目支持函（含 PDF 文件下载/预览）</p>
+
+    <el-form inline :model="q" class="filter-bar">
+      <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="标题:">
+        <el-input v-model="q.title" placeholder="输入标题" clearable />
+      </el-form-item>
+      <el-form-item>
+        <el-button type="primary" @click="onSearch">查询</el-button>
+        <el-button @click="onReset">重置</el-button>
+      </el-form-item>
+    </el-form>
+
+    <div class="page-card">
+      <el-table :data="rows" v-loading="loading" stripe border>
+        <el-table-column prop="title" label="支持函标题" min-width="260" show-overflow-tooltip />
+        <el-table-column prop="projectNo" label="项目编号" width="160" />
+        <el-table-column prop="publishTime" label="发布时间" width="180">
+          <template #default="{ row }">{{ fmt(row.publishTime) }}</template>
+        </el-table-column>
+        <el-table-column prop="supportCount" label="支持单位数" width="120" align="center" />
+        <el-table-column label="操作" width="220" fixed="right">
+          <template #default="{ row }">
+            <el-button link type="primary" @click="openDetail(row)">详情</el-button>
+            <el-button link type="primary" :disabled="!row.fileUrl" @click="openPreview(row)">预览</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+      <el-pagination
+        v-model:current-page="page.pageNum" v-model:page-size="page.pageSize"
+        :total="page.total" :page-sizes="[10,20,50]"
+        layout="total, sizes, prev, pager, next, jumper"
+        @current-change="load" @size-change="load"
+        style="margin-top: 12px; text-align: right;" />
+    </div>
+
+    <!-- 详情 dialog -->
+    <el-dialog v-model="detailOpen" title="支持函详情" width="640" top="6vh">
+      <el-descriptions v-if="current" :column="1" border>
+        <el-descriptions-item label="标题">{{ current.title }}</el-descriptions-item>
+        <el-descriptions-item label="项目编号">{{ current.projectNo }}</el-descriptions-item>
+        <el-descriptions-item label="发布时间">{{ fmt(current.publishTime) }}</el-descriptions-item>
+        <el-descriptions-item label="支持单位数">{{ current.supportCount }}</el-descriptions-item>
+        <el-descriptions-item label="文件">
+          <el-link v-if="current.fileUrl" type="primary" @click="openPreview(current)">点击预览</el-link>
+          <span v-else>-</span>
+        </el-descriptions-item>
+      </el-descriptions>
+    </el-dialog>
+
+    <!-- 预览组件 -->
+    <Preview v-model="previewOpen" :url="previewUrl" :title="previewTitle" />
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive } from 'vue'
+import { bizList } from '@/api/public'
+import Preview from '@/components/Preview.vue'
+
+const q = ref({ projectNo: '', title: '' })
+const rows = ref([])
+const loading = ref(false)
+const page = reactive({ pageNum: 1, pageSize: 10, total: 0 })
+
+async function load() {
+  loading.value = true
+  try {
+    const { data } = await bizList('supportLetter', { ...q.value, pageNum: page.pageNum, pageSize: page.pageSize })
+    rows.value = data?.rows || []
+    page.total = data?.total || 0
+  } catch (e) { rows.value = []; page.total = 0 }
+  finally { loading.value = false }
+}
+function onSearch() { page.pageNum = 1; load() }
+function onReset() { q.value = { projectNo: '', title: '' }; onSearch() }
+function fmt(t) { return t ? new Date(t).toLocaleString('zh-CN') : '' }
+
+const detailOpen = ref(false)
+const current = ref(null)
+function openDetail(row) { current.value = row; detailOpen.value = true }
+
+const previewOpen = ref(false)
+const previewUrl = ref('')
+const previewTitle = ref('支持函预览')
+function openPreview(row) {
+  previewUrl.value = row.fileUrl
+  previewTitle.value = `支持函预览 - ${row.title || ''}`
+  previewOpen.value = true
+}
+
+load()
+</script>
+
+<style scoped>
+.portal-support-letter { padding: 16px; }
+.page-title { font-size: 20px; font-weight: 600; margin: 0 0 8px; }
+.page-sub { color: #909399; font-size: 13px; margin: 0 0 16px; }
+.filter-bar { background: #fff; padding: 16px 20px; border-radius: 6px; border: 1px solid #f0f0f0; margin-bottom: 12px; }
+.page-card { background: #fff; padding: 16px; border-radius: 6px; border: 1px solid #f0f0f0; }
+</style>