Keep optimistic user message during replay

frontend/app/lib/claw-session-cache.ts

@@ -74,6 +74,9 @@ async function fetchSessionStateSnapshot<TSession, TRun>(
 			.sort((left, right) => (left.seq ?? 0) - (right.seq ?? 0))
 			.map((entry) => entry.message)
 			.filter((message) => Boolean(message));
+		if (orderedMessages.length === 0 && !isActiveRunLike(payload.run)) {
+			return null;
+		}
 		const session = {
 			...(payload.session ?? {}),
 			session_id: sessionId,
@@ -157,6 +160,11 @@ function sessionReplaySignature(session: unknown, runStatusValue: unknown) {
 	].join("|");
 }
 
+function isActiveRunLike(value: unknown) {
+	if (!isObject(value)) return false;
+	return value.status === "queued" || value.status === "running";
+}
+
 function isObject(value: unknown): value is Record<string, unknown> {
 	return Boolean(value) && typeof value === "object" && !Array.isArray(value);
 }