UI fixes — nav logo link, saved recipes button padding, mic button overlap

Notes

1. “Zapisane przepisy” link — add padding so it looks like a proper button.
2. Logo in top-left corner — should always navigate to the home page; currently on /recipes the logo click does nothing.
3. Mic/speaker icon overlaps the “Szukaj” button — fix layout; possibly make it a sibling button matching the “Szukaj” style.