feat: núcleo de tickets com Convex (CRUD, play, comentários com anexos) + auth placeholder; docs em AGENTS.md; toasts e updates otimistas; mapeadores Zod; refinos PT-BR e layout do painel de detalhes

web/src/app/ConvexClientProvider.tsx

@@ -0,0 +1,16 @@
+"use client";
+
+import { ConvexProvider, ConvexReactClient } from "convex/react";
+import { ReactNode, useMemo } from "react";
+
+const convexUrl = process.env.NEXT_PUBLIC_CONVEX_URL;
+
+const client = convexUrl ? new ConvexReactClient(convexUrl) : undefined;
+
+export function ConvexClientProvider({ children }: { children: ReactNode }) {
+  if (!convexUrl) {
+    return <>{children}</>;
+  }
+  return <ConvexProvider client={client!}>{children}</ConvexProvider>;
+}
+