feat: show error toast if trying to download db on external db

backend/apps/web/routers/utils.py

@@ -1,5 +1,6 @@
 from fastapi import APIRouter, UploadFile, File, Response
 from fastapi import Depends, HTTPException, status
+from peewee import SqliteDatabase
 from starlette.responses import StreamingResponse, FileResponse
 from pydantic import BaseModel
 
@@ -7,7 +8,7 @@ from pydantic import BaseModel
 from fpdf import FPDF
 import markdown
 
-
+from apps.web.internal.db import DB
 from utils.utils import get_admin_user
 from utils.misc import calculate_sha256, get_gravatar_url
 
@@ -96,8 +97,13 @@ async def download_db(user=Depends(get_admin_user)):
             status_code=status.HTTP_401_UNAUTHORIZED,
             detail=ERROR_MESSAGES.ACCESS_PROHIBITED,
         )
+    if not isinstance(DB, SqliteDatabase):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=ERROR_MESSAGES.DB_NOT_SQLITE,
+        )
     return FileResponse(
-        f"{DATA_DIR}/webui.db",
+        DB.database,
         media_type="application/octet-stream",
         filename="webui.db",
     )