test: settle the post-response composer before seeding; give the TPA recorder adapter its infra helper

submitPlanSeed accepted a stale empty composer when the transcript recorded
end_turn before the CLI repainted (late-repaint-typed-current fails 5/5 on the
old helper, passes 5/5 now). The TPA recording fixture extracted recordE2E
without isPreTurnInfraFailure, so every failed case threw before recording.

test/helpers/plan-seed-submission.ts

@@ -152,6 +152,9 @@ export async function submitPlanSeed(session: SeedSession, seed: string, opts: {
   });
   if (Date.now() >= opts.deadlineAt) throw new PlanSeedTimeout('Plan seed submission exhausted the existing case budget');
   session.sendKey('Enter'); // Separate input event after the acknowledged paste.
+  // The transcript can record end_turn before the CLI repaints, so an empty
+  // composer counts only when the same frame survives one more poll.
+  let settled = '';
   await until(async () => {
     const owned = read();
     if (!owned || owned.pendingBytes) return false;
@@ -178,13 +181,18 @@ export async function submitPlanSeed(session: SeedSession, seed: string, opts: {
       }
       if (row.type === 'user') for (const c of content(row)) if (c.type === 'tool_result') pending.delete(c.tool_use_id);
     }
-    if (!complete || pending.size || owned.status.waitingFor) return false;
+    const unsettled = () => { settled = ''; return false; };
+    if (!complete || pending.size || owned.status.waitingFor) return unsettled();
     const frame = await session.currentScreen!();
     if (opts.isQuestionOrPermission(frame.text)) throw new Error('Plan seed response requires an answer before skill invocation');
     const input = composer(frame.text);
     if (frame.rawEnd !== session.mark() || !input
-      || input.line.replace(/^❯[ \u00a0]*/, '').trim() !== '') return false;
+      || input.line.replace(/^❯[ \u00a0]*/, '').trim() !== '') return unsettled();
     const fresh = read();
-    return !!fresh && !fresh.pendingBytes && fresh.rows.length === owned.rows.length && !fresh.status.waitingFor;
+    if (!fresh || fresh.pendingBytes || fresh.rows.length !== owned.rows.length || fresh.status.waitingFor) return unsettled();
+    const signature = `${frame.rawEnd}:${fresh.rows.length}:${frame.text}`;
+    if (signature === settled) return true;
+    settled = signature;
+    return false;
   });
 }