Initial commit: Converge portfolio rationalization app

Next.js app for mapping a customer's competitive tool landscape onto our
portfolio and building the consolidation business case: assessment
workbench, customer report and Word export, product catalog, competitive
knowledge base, dossier import, shareable landscape questionnaires with a
review inbox, tool-footprint and business-unit value analysis, and an
implementation timeline.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/components/LoadError.tsx

@@ -0,0 +1,16 @@
+"use client";
+
+import Link from "next/link";
+
+export default function LoadError({ message, onRetry }: { message: string; onRetry: () => void }) {
+  return (
+    <div className="card p-10 text-center">
+      <p className="text-[14px] font-semibold" style={{ color: "var(--critical)" }}>Could not load this page</p>
+      <p className="mx-auto mt-2 max-w-[54ch] text-[13px] text-[var(--text-secondary)]">{message}</p>
+      <div className="mt-5 flex justify-center gap-2">
+        <button className="btn btn-primary" onClick={onRetry}>Retry</button>
+        <Link className="btn" href="/">Back to assessments</Link>
+      </div>
+    </div>
+  );
+}