fix(test): auto-acknowledge tool-result follow-ups in mock LLM server (#20528)

packages/app/e2e/prompt/mock.ts

@@ -16,6 +16,16 @@ export function promptMatch(token: string) {
   return (hit: Hit) => bodyText(hit).includes(token)
 }
 
+/**
+ * Match requests whose body contains the exact serialized tool input.
+ * The seed prompts embed JSON.stringify(input) in the prompt text, which
+ * gets escaped again inside the JSON body — so we double-escape to match.
+ */
+export function inputMatch(input: unknown) {
+  const escaped = JSON.stringify(JSON.stringify(input)).slice(1, -1)
+  return (hit: Hit) => bodyText(hit).includes(escaped)
+}
+
 export async function withMockOpenAI<T>(input: { serverUrl: string; llmUrl: string; fn: () => Promise<T> }) {
   const sdk = createSdk(undefined, input.serverUrl)
   const prev = await sdk.global.config.get().then((res) => res.data ?? {})