- [x] In planning tab: It is very annoying that I need to click "save" on each individual thing.
      Better if we auto-save this (with a debounce).
      DONE — per-row Save button removed; edits auto-save 800ms after the last change, with a
      per-row "Sparar…"/"Sparat" status. Also fixed the underlying Plan-page bug where every
      mutation swapped the page for a spinner and collapsed the expanded row.