fix(browser): remote profile tab ops follow-up (#1060) (thanks @mukhtharcm)

Landed via follow-up to #1057.

Gate: pnpm lint && pnpm build && pnpm test

src/browser/pw-ai-module.ts

@@ -0,0 +1,41 @@
+import { extractErrorCode, formatErrorMessage } from "../infra/errors.js";
+
+export type PwAiModule = typeof import("./pw-ai.js");
+
+type PwAiLoadMode = "soft" | "strict";
+
+let pwAiModuleSoft: Promise<PwAiModule | null> | null = null;
+let pwAiModuleStrict: Promise<PwAiModule | null> | null = null;
+
+function isModuleNotFoundError(err: unknown): boolean {
+  const code = extractErrorCode(err);
+  if (code === "ERR_MODULE_NOT_FOUND") return true;
+  const msg = formatErrorMessage(err);
+  return (
+    msg.includes("Cannot find module") ||
+    msg.includes("Cannot find package") ||
+    msg.includes("Failed to resolve import") ||
+    msg.includes("Failed to resolve entry for package") ||
+    msg.includes("Failed to load url")
+  );
+}
+
+async function loadPwAiModule(mode: PwAiLoadMode): Promise<PwAiModule | null> {
+  try {
+    return await import("./pw-ai.js");
+  } catch (err) {
+    if (mode === "soft") return null;
+    if (isModuleNotFoundError(err)) return null;
+    throw err;
+  }
+}
+
+export async function getPwAiModule(opts?: { mode?: PwAiLoadMode }): Promise<PwAiModule | null> {
+  const mode: PwAiLoadMode = opts?.mode ?? "soft";
+  if (mode === "soft") {
+    if (!pwAiModuleSoft) pwAiModuleSoft = loadPwAiModule("soft");
+    return await pwAiModuleSoft;
+  }
+  if (!pwAiModuleStrict) pwAiModuleStrict = loadPwAiModule("strict");
+  return await pwAiModuleStrict;
+}