Integrate current master before rich ACP foundation review

Co-Authored-By: Paperclip <noreply@paperclip.ing>

* commit '53aad90b9':
  fix: retry sandbox ACP input delivery after gateway failures (#14485)
  fix: retain project defaults in partial workspace overrides (#14502)
  test: control Telegram subscription retry timing (#14501)
  fix: retain diagnostic reasons for native runner failures (#14481)
  fix: prevent run identity locks from blocking audit checks (#14478)
  fix: preserve company context across browser hot reload (#14482)
  feat(ui): improve task composer controls and pending input (#14322)
  Improve task artifacts with rich cards and editable stories (#14469)

tests/runner-e2e/chat-flow.ts

@@ -693,11 +693,8 @@ export async function runChatFlow(input: ChatFlowInput) {
           await idle(3);
         } else await turn(clarification, 3);
       } else if (caseId === "plan-handoff") {
-        await page.getByTestId("task-chat-composer-mode").click();
-        await page
-          .getByTestId("task-chat-composer-mode-menu")
-          .getByText("Plan mode", { exact: true })
-          .click();
+        await page.getByTestId("task-chat-composer-add").click();
+        await page.getByTestId("composer-add-plan").click();
         await turn(
           `Let's plan a two-sentence garden club welcome note. The finished welcome note itself must contain the exact phrase ${draftMarker}. Write a plan in the plan panel that includes this requirement, and present it for approval. When I approve the final revision, create a suitable repository-free project and an assigned task for yourself, copy the plan into that task, and have it save the note as a Paperclip document attached to that execution task and finish. Do not create the project or task before approval.`,
           1,