fix(mindspace): fail closed on invalid page data delivery

src/hooks/useTKMindChat.ts

@@ -54,6 +54,7 @@ import { buildAutoChatSkillPrefix } from '../../chat-skills.mjs';
 import {
   reconcileSessionEventRequestContext,
   resolvePostAgentRunChatState,
+  shouldKeepStreamingAfterRunError,
   shouldPromoteSessionIdToStreaming,
 } from '../../chat-agent-run-gate.mjs';
 import { mergeConversationSnapshot } from '../../chat-finish-sync.mjs';
@@ -233,11 +234,6 @@ function mergeMessagePages(older: Message[], current: Message[]): Message[] {
   return merged;
 }
 
-function isAmbiguousReplySubmitError(err: unknown) {
-  if (!(err instanceof ApiError)) return true;
-  return err.status === 0 || err.status === 409 || err.status >= 500;
-}
-
 const SESSION_LIST_RETRY_ATTEMPTS = 3;
 const SESSION_LIST_RETRY_DELAY_MS = 450;
 
@@ -1619,7 +1615,11 @@ export function useTKMindChat(
           }
         }
       } catch (err) {
-        if (activeSessionId && isAmbiguousReplySubmitError(err)) {
+        if (
+          activeSessionId &&
+          err instanceof ApiError &&
+          shouldKeepStreamingAfterRunError(err.status)
+        ) {
           subscribeToSession(activeSessionId);
           setChatState('streaming');
           setError(null);