* remove filter from next edit svg border
* reduce border radius to 2 in next edit svg
* update border
* remove strikethrough from next edit deletion ui
* remove diff background for now
* feat: word-level diff in next edit svg
* fix: don't alternate non-responses due to empty chain
* fix: log next edit completions to continue console
* fix: test and update chaining behavior to avoid repetitive requests and avoid alternating non-responses