Add /api/send-config (store config)

backend/api.py

@@ -6,7 +6,7 @@ from pathlib import Path
 from typing import Any, Dict
 
 from dotenv import load_dotenv
-from fastapi import FastAPI, HTTPException, UploadFile, File, Form
+from fastapi import FastAPI, HTTPException, Request, UploadFile, File, Form
 
 def _env(*keys: str, default: str = "") -> str:
     import os
@@ -38,6 +38,8 @@ app.add_middleware(
 REPO_ROOT = Path(__file__).resolve().parents[1]
 BACKEND_DIR = REPO_ROOT / "backend"
 UPLOADS_DIR = BACKEND_DIR / "worker" / "uploads"
+CONFIGS_DIR = UPLOADS_DIR / "configs"
+
 
 # Load backend/.env explicitly ONCE for this process
 load_dotenv(BACKEND_DIR / ".env", override=True)