fix: only re-add song to queue if previously 1-star and queue < 500

- Check rating === 1 before re-adding to prevent adding songs that were
  never in the queue
- Only re-add when queue has fewer than 500 items

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/common/useRating.jsx

@@ -76,7 +76,7 @@ export const useRating = (resource, record) => {
                 audio.dispatchEvent(new Event('ended'))
               }
             }
-          } else if (val !== 1 && !inQueue) {
+          } else if (rating === 1 && val !== 1 && !inQueue && queue.length < 500) {
             dispatch(addTracks({ [trackId]: record }))
           }
         }