Rewind chat or files from any user message (#1154)

* Add Pi extension-launch plumbing for in-process tree primitives

* Add Rewind controls for agent sessions

* Preserve SDK checkpoint env var so Claude file rewind works

The SDK injects CLAUDE_CODE_ENABLE_SDK_FILE_CHECKPOINTING=true when file checkpointing is enabled. The earlier parent-env stripping from c4782ec71c was too broad and removed that child flag along with real parent-session markers.

Keep stripping parent markers, but preserve the checkpoint flag so the SDK rewind path can run directly. With that boundary fixed, the JSONL file-rewind fallback is no longer needed.

* Update OpenCode history replay tests for rewind state

* Show Rewind actions in an adaptive sheet

* Fix rewind semantics across providers

* Refactor Pi IDs through extension capture

* Restore user message to composer after rewind

* Fix Claude rewind tool result mapping

* Fix Claude rewind session switch roundtrip

* Fix rewind and optimistic message regressions

* Tighten rewind test discipline

* Fix OpenCode optimistic message reconciliation

* Reconcile optimistic user messages by marker

* Reorder user message actions

* Unify provider user message contract

* Add Claude rewind flow Playwright contract

* Add Codex rewind flow Playwright contract

* Add OpenCode rewind flow Playwright contract

* Add Pi rewind flow Playwright contract

* Remove real-provider rewind Playwright contracts

* Gate real-provider rewind specs from CI Playwright

packages/app/e2e/helpers/terminal-perf.ts

@@ -2,6 +2,7 @@ import { expect, type Page } from "@playwright/test";
 import path from "node:path";
 import { pathToFileURL } from "node:url";
 import { randomUUID } from "node:crypto";
+import { readFileSync } from "node:fs";
 import { createNodeWebSocketFactory, type NodeWebSocketFactory } from "./node-ws-factory";
 import { buildHostWorkspaceRoute } from "../../src/utils/host-routes";
 
@@ -35,6 +36,10 @@ export interface TerminalPerfDaemonClient {
     timeout?: number,
   ): Promise<{ status: string }>;
   sendAgentMessage(agentId: string, text: string): Promise<void>;
+  waitForFinish(
+    agentId: string,
+    timeout?: number,
+  ): Promise<{ status: string; final?: { lastError?: string | null } | null }>;
   subscribeTerminal(
     terminalId: string,
   ): Promise<{ terminalId: string; slot: number; error: null } | { error: string }>;
@@ -68,6 +73,7 @@ interface TerminalPerfDaemonClientConfig {
   url: string;
   clientId: string;
   clientType: "cli";
+  appVersion?: string;
   webSocketFactory?: NodeWebSocketFactory;
 }
 
@@ -91,12 +97,22 @@ export async function connectTerminalClient(): Promise<TerminalPerfDaemonClient>
     url: getDaemonWsUrl(),
     clientId: `terminal-perf-${randomUUID()}`,
     clientType: "cli",
+    appVersion: loadAppVersion(),
     webSocketFactory,
   });
   await client.connect();
   return client;
 }
 
+function loadAppVersion(): string {
+  const packageJsonPath = path.resolve(__dirname, "../../package.json");
+  const packageJson = JSON.parse(readFileSync(packageJsonPath, "utf8")) as { version?: unknown };
+  if (typeof packageJson.version !== "string" || packageJson.version.length === 0) {
+    throw new Error(`Missing app version in ${packageJsonPath}`);
+  }
+  return packageJson.version;
+}
+
 export function buildTerminalWorkspaceUrl(workspaceId: string, terminalId: string): string {
   const serverId = getServerId();
   const route = buildHostWorkspaceRoute(serverId, workspaceId);