Imperial dimension fields took decimal feet rounded to 0.1 ft, which is 1.2 inches — so of the whole-inch marks in a foot only 0", 6" and 12" were exactly representable. Everything else was off by up to 0.6". Type 2.58 and the field redisplayed 2.6: the value stored fine, but what you typed and what you saw disagreed. Two things made that read as an oversight rather than a decision. The app already speaks feet and inches, just not where you edit — formatCm renders 24′ 0″, so the garden card said 24′ 0″ × 24′ 0″ while the dialog beside it said Width (ft) 24. And cmFromFtIn(feet, inches) has always taken an inches parameter no caller ever passed. parseDimension accepts 2' 7", 2′ 7″, 2ft 7in, 2' 7, 31", 2', and a bare 2.5 still meaning 2½ feet, so nothing anyone has typed before now breaks. formatDimensionInput renders the value back as 2′ 7″, with one decimal inch (7′ 10.5″) rather than whole inches — 0.1" is about 0.25cm, so what is displayed stays honest about what is stored. Metric entry is unchanged, decimal meters, and deliberately does not accept feet syntax. The sign applies to the whole value. -2' 6" is -(2ft + 6in) = -30", not -2ft + 6in = -18". The naive implementation attaches the sign to the feet term and gets -18"; there is a test for exactly that. The no-op guard had to change shape. It compared the parsed value against displayFromCm(current), which is what stopped a blur-without-edit from drifting the value; with compound entry there is no single display number to compare against, and a numeric tolerance has a nastier failure — a bed dragged on canvas to an arbitrary cm renders as 2′ 7.9″, and merely tabbing through the field would snap it to a whole inch. It now compares the field's TEXT against the string that field renders for the current value, which means "you didn't edit this" exactly. Typing the same value a different way falls through to the cm comparison and is still a no-op. The affected inputs move from type="number", which cannot hold 2' 7", to text. Imperial gets inputMode="text" because ' and " are on no numeric keypad; metric keeps inputMode="decimal" since it never needs them. A bare number still means feet, so the keypad path stays usable on a phone either way — but this wants checking on an actual phone before it's called settled. Includes the garden grid field, which #47 moved to dimension scale: leaving it as a number input beside two compound ones would have been the same two-scales-one-row confusion #47 removed. cmFromDisplay is gone; parseDimension is the entry path now and nothing else called it. Closes #59 Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]> Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ