Browser Markdown Scrape

import type { BrowserRun } from "../types/env";import type { QuickActionPayload } from "../types/browser";function isResponse(value: unknown): value is Response {  return (    typeof value === "object" &&    value !== null &&    typeof (value as Response).json === "function" &&    typeof (value as Response).ok === "boolean"  );}/** * Call Browser Rendering quickAction and normalize Response or result object to a payload. */export async function runQuickAction(  browser: BrowserRun,  action: "markdown" | "scrape",  params: Record<string, unknown>): Promise<QuickActionPayload> {  const raw = await browser.quickAction(action, params);  if (isResponse(raw)) {    let body: QuickActionPayload;    try {      body = (await raw.json()) as QuickActionPayload;    } catch {      throw new Error(`Browser ${action} returned non-JSON response`);    }    if (!raw.ok || body.success === false) {      throw new Error(body.error ?? `Browser ${action} failed (${raw.status})`);    }    return body;  }  if (raw.success === false) {    throw new Error(typeof raw.result === "string" ? raw.result : `Browser ${action} failed`);  }  return raw;}export function extractMarkdown(payload: QuickActionPayload): string {  const { result } = payload;  if (typeof result === "string") return result;  if (    result &&    typeof result === "object" &&    "markdown" in result &&    typeof (result as { markdown: unknown }).markdown === "string"  ) {    return (result as { markdown: string }).markdown;  }  throw new Error("Browser markdown response missing result string");}export function extractScrapeResults(payload: QuickActionPayload): unknown {  const { result } = payload;  if (Array.isArray(result)) return result;  if (    result &&    typeof result === "object" &&    "results" in result &&    Array.isArray((result as { results: unknown }).results)  ) {    return (result as { results: unknown[] }).results;  }  throw new Error("Browser scrape response missing results array");}