Deployment protection bypass (#298)

* test preview bypass 2

Co-authored-by: Cursor <cursoragent@cursor.com>

* add apiFetch wrapper with Vercel bypass via query param + header

the template workflow was missing VERCEL_AUTOMATION_BYPASS_SECRET,
so all action API calls to preview deployments hit Vercel's
deployment protection without bypass. this also consolidates the
bypass logic into a single fetch wrapper that applies the secret
as both a query parameter (matching server-side forwarding) and
a header for belt-and-suspenders reliability.

Co-authored-by: Cursor <cursoragent@cursor.com>

* security hardening for Vercel bypass

- redact bypass token from webhook forwarder logs and response body
- remove dead x-preview-api-forward header
- refactor getAllSecrets() to use SENSITIVE_PATTERNS instead of hardcoded list
- enforce https:// on API_URL (localhost exempt for local dev)

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Cursor <cursoragent@cursor.com>

utils/apiUrl.ts

@@ -1,24 +1,27 @@
 import { log } from "./cli.ts";
 
+function isLocalUrl(url: URL): boolean {
+  return url.hostname === "localhost" || url.hostname === "127.0.0.1";
+}
+
 /**
  * resolve the Pullfrog API base URL.
  *
  * in the action: API_URL is not explicitly set, so this falls back to https://pullfrog.com.
  * in local dev: API_URL=http://localhost:3000 (from .env).
+ *
+ * enforces https:// for non-local URLs to prevent cleartext credential transmission.
  */
 export function getApiUrl(): string {
-  const url = process.env.API_URL || "https://pullfrog.com";
-  log.debug(`resolved API_URL: ${url}`);
-  return url;
-}
+  const raw = process.env.API_URL || "https://pullfrog.com";
+  const parsed = new URL(raw);
 
-/**
- * returns headers needed to bypass Vercel deployment protection on preview deployments.
- * when VERCEL_AUTOMATION_BYPASS_SECRET is set (preview repos), includes the bypass header.
- * otherwise returns an empty object (production / local dev).
- */
-export function getVercelBypassHeaders(): Record<string, string> {
-  const secret = process.env.VERCEL_AUTOMATION_BYPASS_SECRET;
-  if (!secret) return {};
-  return { "x-vercel-protection-bypass": secret };
+  if (parsed.protocol !== "https:" && !isLocalUrl(parsed)) {
+    throw new Error(
+      `API_URL must use https:// (got ${parsed.protocol}). only localhost is exempt.`
+    );
+  }
+
+  log.debug(`resolved API_URL: ${raw}`);
+  return raw;
 }