gegenrichtung auch angepasst

math-tutor/backend/app/config.py

@@ -48,6 +48,12 @@ def get_mathpix_settings() -> MathpixSettings:
         app_key=os.getenv("MATHPIX_APP_KEY") 
     )
 
+def get_frontend_url() -> str:
+    url = os.getenv("FRONTEND_URL")
+    if not url:
+        raise ValueError("Missing FRONTEND_URL")
+    return url
+
 def get_ollama_settings() -> OllamaSettings:
     return OllamaSettings(
         base_url=os.getenv("OLLAMA_URL", "http://localhost:11434"),

math-tutor/backend/app/main.py

@@ -3,6 +3,8 @@ from contextlib import asynccontextmanager
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from app.api import canvas, chat, health, retrieval
+from app.config import get_frontend_url
+
 
 @asynccontextmanager
 async def lifespan(_app: FastAPI):
@@ -14,7 +16,7 @@ app = FastAPI(title="Math Tutor API", version="0.1.0", lifespan=lifespan)
 
 app.add_middleware(
     CORSMiddleware,
-    allow_origins=["http://localhost:5173"],
+    allow_origins=["http://localhost:5173", get_frontend_url()],
     allow_credentials=True,
     allow_methods=["*"],
     allow_headers=["*"],