fix(backend): allow CORS from any localhost port for desktop app

surfsense_backend/app/app.py

@@ -350,6 +350,7 @@ allowed_origins.extend(
 app.add_middleware(
     CORSMiddleware,
     allow_origins=allowed_origins,
+    allow_origin_regex=r"^https?://(localhost|127\.0\.0\.1)(:\d+)?$",
     allow_credentials=True,
     allow_methods=["*"],  # Allows all methods
     allow_headers=["*"],  # Allows all headers