Add ClientMap wrapper to avoid lazy() SSR resolution

.client.tsx modules return undefined on the server, but lazy() still
tries to resolve them during SSR causing "Element type is invalid".
Replace lazy()+Suspense with a ClientMap component that dynamically
imports the map only in useEffect (client-side only).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/journal/app/components/ClientMap.tsx

@@ -0,0 +1,21 @@
+import { useState, useEffect, type ComponentProps } from "react";
+
+type MapProps = ComponentProps<typeof import("./RouteMapThumbnail.client").RouteMapThumbnail>;
+
+export function ClientMap(props: MapProps) {
+  const [Component, setComponent] = useState<React.ComponentType<MapProps>>();
+
+  useEffect(() => {
+    import("./RouteMapThumbnail.client").then((m) => setComponent(() => m.RouteMapThumbnail));
+  }, []);
+
+  if (!Component) {
+    return (
+      <div className={`flex items-center justify-center bg-gray-100 text-gray-500 ${props.className ?? "h-36 w-full rounded"}`}>
+        Loading map...
+      </div>
+    );
+  }
+
+  return <Component {...props} />;
+}