feat(frontend): purge all static content fallback files and enforce strict backend-only dynamic rendering

- Delete all legacy static content data files (members.ts, publications.ts, lectures.ts, standards.ts, projects.ts)
- Remove all fallback imports and static fallbacks across all page components
- Enforce strict dynamic runtime fetching where pages render empty datasets when Go backend server is unavailable

refer_landing_page/app/members/page.tsx

@@ -1,6 +1,5 @@
 import React from "react";
 import type { Metadata } from "next";
-import { activeMembers as staticMembers, alumni as staticAlumni } from "../../content/members";
 import { getMembers, getAlumni } from "../../lib/api";
 import { ProfessorDetailsDialog } from "./_components/ProfessorDetailsDialog";
 
@@ -22,8 +21,8 @@ const DEGREE_LABEL: Record<string, string> = {
 };
 
 export default async function MembersPage() {
-  const activeMembers = (await getMembers()) ?? staticMembers;
-  const alumni = (await getAlumni()) ?? staticAlumni;
+  const activeMembers = (await getMembers()) ?? [];
+  const alumni = (await getAlumni()) ?? [];
 
   const phdStudents = activeMembers.filter(
     (m) =>