fix My Places page crash when user has no places

Backend: ensure PaginatedPlaces.Data is never nil (return empty slice)
Frontend: defensive fallback res.data || []

backend/internal/handlers/places.go

@@ -157,6 +157,10 @@ func (h *PlaceHandler) ListMy(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if places.Data == nil {
+		places.Data = []*models.Place{}
+	}
+
 	writeJSON(w, http.StatusOK, places)
 }
 

frontend/src/app/places/my/page.tsx

@@ -265,7 +265,7 @@ export default function MyPlacesPage() {
   const fetchPlaces = () => {
     setLoading(true)
     api.get<{ data: Place[] }>('/places/my')
-      .then((res) => setPlaces(res.data))
+      .then((res) => setPlaces(res.data || []))
       .catch(() => {})
       .finally(() => setLoading(false))
   }