feat: wayfinding system across chapters, HUD and project plates; cut boot log, headlight and ops strip

src/lib/route-plate.ts

@@ -0,0 +1,15 @@
+import type { PublicProject } from '@/content/types';
+
+/**
+ * Decorative registration plate for a project, e.g. "05.1 / PRIVATE / ACTIVE".
+ * Built only from real content fields; rendered through CSS generated content.
+ */
+export function routePlate(
+  exit: string | undefined,
+  index: number,
+  project: Pick<PublicProject, 'visibility' | 'maturity'>,
+): string {
+  const code = exit === undefined ? `${index + 1}` : `${exit}.${index + 1}`;
+  const maturity = project.maturity.replace(/-/gu, ' ');
+  return `${code} / ${project.visibility} / ${maturity}`.toUpperCase();
+}