优化中心联系人展示名称解析

- 新增中心联系人展示名解析服务，支持从逗号分隔用户 ID 解析姓名\n- 中心列表接口返回 contact_display，避免前端依赖项目成员权限才能展示联系人姓名\n- 中心管理和立项会议授权页面优先使用后端联系人展示名\n- 补充联系人解析服务测试和立项会议授权页面展示顺序测试

frontend/src/views/ia/StartupMeetingAuth.test.ts

@@ -19,4 +19,20 @@ describe("StartupMeetingAuth permissions", () => {
     expect(source).toContain("canCreateAuth");
     expect(source).toContain("if (!canCreateAuth.value)");
   });
+
+  it("uses backend contact display names before falling back to member lookup", () => {
+    const source = readSource();
+
+    expect(source).toContain("row.contact_display");
+    expect(source.indexOf("row.contact_display")).toBeLessThan(source.indexOf("memberNameMap.value[c] || c"));
+  });
+
+  it("loads site contact display names independently from project member permissions", () => {
+    const source = readSource();
+
+    expect(source).toContain("fetchSites(studyId, { limit: 500 })");
+    expect(source).toContain("if (canReadMembers.value)");
+    expect(source.indexOf("fetchSites(studyId, { limit: 500 })")).toBeLessThan(source.indexOf("if (canReadMembers.value)"));
+    expect(source.indexOf("contact_display: site.contact_display")).toBeLessThan(source.indexOf("const membersResp = canReadMembers.value"));
+  });
 });