fix(ios): improve bridge discovery and pairing UX

src/infra/machine-name.ts

@@ -0,0 +1,43 @@
+import { execFile } from "node:child_process";
+import os from "node:os";
+import { promisify } from "node:util";
+
+const execFileAsync = promisify(execFile);
+
+let cachedPromise: Promise<string> | null = null;
+
+async function tryScutil(key: "ComputerName" | "LocalHostName") {
+  try {
+    const { stdout } = await execFileAsync("/usr/sbin/scutil", ["--get", key], {
+      timeout: 1000,
+      windowsHide: true,
+    });
+    const value = String(stdout ?? "").trim();
+    return value.length > 0 ? value : null;
+  } catch {
+    return null;
+  }
+}
+
+function fallbackHostName() {
+  return (
+    os
+      .hostname()
+      .replace(/\.local$/i, "")
+      .trim() || "clawdis"
+  );
+}
+
+export async function getMachineDisplayName(): Promise<string> {
+  if (cachedPromise) return cachedPromise;
+  cachedPromise = (async () => {
+    if (process.platform === "darwin") {
+      const computerName = await tryScutil("ComputerName");
+      if (computerName) return computerName;
+      const localHostName = await tryScutil("LocalHostName");
+      if (localHostName) return localHostName;
+    }
+    return fallbackHostName();
+  })();
+  return cachedPromise;
+}