On a phone the editor stacked a control column (title, share, season, a 7-chip palette wrapping to 3 rows, journal/history/assistant) ABOVE the canvas, crushing the garden — the point of the app — into a short strip. There was no single "mode" switch: fixtures lived in the palette, plants in a floating focus toolbar, and journal/assistant in the rail. Mobile-first now (#99): the canvas is the whole screen, and a bottom mode bar switches the tools docked beneath it — - Fixtures → the object palette (arm → tap to place) - Plants → the seed tray, once a bed is focused; focusing a bed enters this mode. No bed focused → a "tap a bed, then Plant here" hint. Done planting / Clear ride along. - Journal → opens the journal rail sheet - Assistant → opens the chat rail sheet (hidden with no model configured) A slim mobile top strip keeps the garden name / season / share that lived in the desktop column. Closing a panel rail returns to a canvas mode so the bar reappears; History stays a rail sub-tab (not a fifth mode). Desktop is untouched: the mode bar is md:hidden and the side-column layout stands; `mode` is an inert hint there. Store gains `mode`/`setMode` (reset with the rest of transient state on garden switch). Verified live at 390px (each mode + the select-bed → Plant here → seed-tray flow, canvas now dominant) and 1280px (desktop unchanged). tsc + vitest (92) + build green. DESIGN.md updated. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]> Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ