Complete Next.js migration with SSR and Docker deployment

- Migrate from vanilla JavaScript SPA to Next.js 16 with App Router
- Add server-side rendering for all pages (Home, Compare, Rankings)
- Create individual school pages with dynamic routing (/school/[urn])
- Implement Chart.js and Leaflet map integrations
- Add comprehensive SEO with sitemap, robots.txt, and JSON-LD
- Set up Docker multi-service architecture (PostgreSQL, FastAPI, Next.js)
- Update CI/CD pipeline to build both backend and frontend images
- Fix Dockerfile to include devDependencies for TypeScript compilation
- Add Jest testing configuration
- Implement performance optimizations (code splitting, caching)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

nextjs-app/components/EmptyState.module.css

@@ -0,0 +1,47 @@
+.emptyState {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 4rem 2rem;
+  text-align: center;
+  background: white;
+  border: 2px dashed #e5e7eb;
+  border-radius: 12px;
+  min-height: 400px;
+}
+
+.icon {
+  color: #d1d5db;
+  margin-bottom: 1.5rem;
+}
+
+.title {
+  margin: 0 0 0.5rem 0;
+  font-size: 1.25rem;
+  font-weight: 600;
+  color: #1f2937;
+}
+
+.message {
+  margin: 0 0 1.5rem 0;
+  font-size: 1rem;
+  color: #6b7280;
+  max-width: 500px;
+}
+
+.button {
+  padding: 0.75rem 1.5rem;
+  font-size: 1rem;
+  font-weight: 500;
+  background: #3b82f6;
+  color: white;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+  transition: all 0.2s ease;
+}
+
+.button:hover {
+  background: #2563eb;
+}