backend: convert input images to webp

backend/api.py

@@ -4,6 +4,7 @@ from fastapi.middleware.cors import CORSMiddleware
 from pathlib import Path
 
 from vntypes import Novel, Mark
+from utils import *
 from db import VNDB
 
 app = FastAPI()
@@ -42,7 +43,4 @@ async def novel_thumb(thumb: Annotated[bytes, File()], filename: str):
 
 @app.post("/api/screenshot")
 async def screenshot(scrshot: Annotated[bytes, File()], filename: str):
-    Path("screens/").mkdir(exist_ok=True)
-    with open(Path("screens", filename), "wb") as file:
-        file.write(scrshot)
-    return {"file_size": len(scrshot)}
+    return {"file_size": save_image(scrshot, "screens", filename)}