fix(web): accept unknown stream payload when binding spoken prompts

Publish next build failed because the spoken-bind helper required result/output
on chunk payload, which the runner stream type does not have.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/lib/rectification-agentic/v9/turn-narration.ts

@@ -48,12 +48,15 @@ export function readOpenQuestionPrompt(value: unknown): string | null {
 
 export function openQuestionPromptFromToolResult(chunk: {
   type?: string;
-  payload?: { result?: unknown; output?: unknown };
+  payload?: unknown;
   object?: unknown;
 }): string | null {
   if (chunk.type !== "tool-result") return null;
-  return readOpenQuestionPrompt(chunk.payload?.result)
-    ?? readOpenQuestionPrompt(chunk.payload?.output)
+  const payload = chunk.payload && typeof chunk.payload === "object" && !Array.isArray(chunk.payload)
+    ? chunk.payload as Record<string, unknown>
+    : null;
+  return readOpenQuestionPrompt(payload?.result)
+    ?? readOpenQuestionPrompt(payload?.output)
     ?? readOpenQuestionPrompt(chunk.object)
     ?? readOpenQuestionPrompt(chunk.payload);
 }