Initial commit: CI Agent competitive-intelligence monitoring app

FastAPI + Celery + Next.js + Postgres/Redis app with company monitoring,
source collection, LLM-based change analysis, enrichment, and account
security (Turnstile, escalating lockout, email verification).

apps/web/components/page-transition.tsx

@@ -0,0 +1,19 @@
+"use client";
+
+import { usePathname } from "next/navigation";
+
+/**
+ * Next's App Router swaps route content instantly with no transition of its
+ * own. Keying a wrapper div on the pathname forces React to remount it on
+ * every navigation, which retriggers the `animate-fade-in` CSS animation
+ * (see tailwind.config.ts) - the same technique used for tab switches on the
+ * company detail page.
+ */
+export function PageTransition({ children }: { children: React.ReactNode }) {
+  const pathname = usePathname();
+  return (
+    <div key={pathname} className="animate-fade-in">
+      {children}
+    </div>
+  );
+}