`/` always dumped you on the gardens list; a phone user who lives in one
garden had to open the list and tap in every time. Now the device
remembers the garden it was last in and `/` resumes there.
- lib/lastGarden.ts: per-device localStorage (pansy:last-garden), same
swallow-failures rationale as the seed tray / recents. getLastGardenId
guards against a non-positive/garbage stored value.
- The `/` route redirects to the stored garden when present, else /gardens.
- The editor records the garden on successful load, and — if it 404s
(deleted or access revoked) — forgets it (only if it's the stored one,
so a bad direct link can't wipe a good resume target) and bounces to the
list, so a stale id can't trap the user on an error screen. Transient
errors still show the retryable message.
- ApiError.isNotFound getter (mirrors isConflict/isUnauthorized).
Verified live at 390px: resume into the last garden; a stale id bounces to
/gardens and clears itself. tsc + vitest (incl. new lastGarden test) green.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ
