WT.3 Wall tool, Set and Modify: placement offset, join on/off, edit by dimension, offset wall, box stretch, align and lock, lock dimension

Wall tool spec pages 4-8 (Duncan, 2026-11-05), tracked at /roadmap-internal 'BimCraft wall tool specification'. Icons: the DU.1 family (assets/js/app-workspace-icons.js: 32 grid, 1.5 round stroke, two-tone fills, Full Color or Outline). Pages 5-6. Partly or not built: Placement offset (a free distance off the picked line; today half a thickness), Join on / off (free-standing wall; today joins are always automatic), Edit by dimension (type a value: the selected wall moves, the reference holds; today typing does not move a wall: FX.58 / spec test 4), Offset wall (neighbours stretch), Box stretch (ends inside a marquee move, walls crossing it stretch), Align and lock (padlock holds the alignment), Lock dimension (a locked dimension holds through later edits). The last two are the new Hold block (wall-dimensions.js is the base: dimensions already know which face they measure). Icons: wallplace, walljoinsw, walleditdim, walloffset, wallbox, wallalignlock, walllockdim. OTHER APPS: CadCraft plan walls and dimensions want Hold too (it is the Revit padlock); build it once for both. Not started.

walls-09 2026-11-06 (done): Built in /lab: placement offset and Join on/off in the Wall row (Wall tool and shapes); edit by dimension (type the value in a reference dimension's Properties: the second reference's wall moves square, the first holds; spec test 4 Pass); Offset (move or Copy); Box stretch; the Hold block (lib/walls... see docs/0.9-sessions/walls-09.md.

walls-plan-09 2026-11-06 (done): CadCraft plan walls: placement offset and Join off in WALL (O, D), edit by dimension (WALLDIM), Offset (WALLOFFSET, Copy), box stretch (WALLSTRETCH), and the Hold block (WALLHOLD align and lock, WALLHOLDDIM, WALLUNHOLD, WALLHOLDS): stored on the wall, kept by moving the other side, refused with the ... see docs/0.9-sessions/walls-plan-09.md.