refactor(relay): add --smoke entrypoint

src/macos/relay-smoke.ts

@@ -0,0 +1,39 @@
+export type RelaySmokeTest = "qr";
+
+export function parseRelaySmokeTest(
+  args: string[],
+  env: NodeJS.ProcessEnv,
+): RelaySmokeTest | null {
+  const smokeIdx = args.indexOf("--smoke");
+  if (smokeIdx !== -1) {
+    const value = args[smokeIdx + 1];
+    if (!value || value.startsWith("-")) {
+      throw new Error("Missing value for --smoke (expected: qr)");
+    }
+    if (value === "qr") return "qr";
+    throw new Error(`Unknown smoke test: ${value}`);
+  }
+
+  if (args.includes("--smoke-qr")) return "qr";
+
+  // Back-compat: only run env-based smoke mode when no CLI args are present,
+  // to avoid surprising early-exit when users set env vars globally.
+  if (
+    args.length === 0 &&
+    (env.CLAWDBOT_SMOKE_QR === "1" || env.CLAWDBOT_SMOKE === "qr")
+  ) {
+    return "qr";
+  }
+
+  return null;
+}
+
+export async function runRelaySmokeTest(test: RelaySmokeTest): Promise<void> {
+  switch (test) {
+    case "qr": {
+      const { renderQrPngBase64 } = await import("../web/qr-image.js");
+      await renderQrPngBase64("smoke-test");
+      return;
+    }
+  }
+}