refactor: share gateway timeout parsing

src/cli/parse-timeout.ts

@@ -16,3 +16,39 @@ export function parseTimeoutMs(raw: unknown): number | undefined {
   }
   return Number.isFinite(value) ? value : undefined;
 }
+
+export function parseTimeoutMsWithFallback(
+  raw: unknown,
+  fallbackMs: number,
+  options: {
+    invalidType?: "fallback" | "error";
+  } = {},
+): number {
+  if (raw === undefined || raw === null) {
+    return fallbackMs;
+  }
+
+  const value =
+    typeof raw === "string"
+      ? raw.trim()
+      : typeof raw === "number" || typeof raw === "bigint"
+        ? String(raw)
+        : null;
+
+  if (value === null) {
+    if (options.invalidType === "error") {
+      throw new Error("invalid --timeout");
+    }
+    return fallbackMs;
+  }
+
+  if (!value) {
+    return fallbackMs;
+  }
+
+  const parsed = Number.parseInt(value, 10);
+  if (!Number.isFinite(parsed) || parsed <= 0) {
+    throw new Error(`invalid --timeout: ${value}`);
+  }
+  return parsed;
+}