Ship free-tier watermark policy (2 clean renders) and align pricing/legal copy.

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

lib/storage.ts

@@ -1,4 +1,5 @@
 import path from "path";
+import { WATERMARK_FILE_PATH } from "./watermark-policy";
 
 export function getUploadDir(): string {
   return process.env.UPLOAD_DIR || path.join(process.cwd(), "uploads");
@@ -8,6 +9,9 @@ export function getJobDir(userId: string, jobId: string): string {
   return path.join(getUploadDir(), userId, jobId);
 }
 
+/** Brand watermark PNG used by the default overlay pipeline. */
 export function getWatermarkPath(): string {
-  return path.join(process.cwd(), "assets", "watermark.png");
+  return process.env.WATERMARK_FILE_PATH?.trim() || WATERMARK_FILE_PATH;
 }
+
+export { WATERMARK_FILE_PATH };