The store renderer placed every decal at raw pos_x/y/z with raw rotation, ignoring preferred_wall/snap/
object_type — so wall art (pos with one in-plane axis, perpendicular=0, rotation 0) floated in mid-room on
the wrong axis. Ported WowPlatter public/js/virtual/decals.js snapToWallAndOrient: a space decal (rotation
all-zero or snap=wall) keeps its in-plane axis, the perpendicular axis is pushed flat to its named wall
(north z=-D/2 yaw0 · south z=D/2 yawpi · east x=W/2 yaw-pi/2 · west x=-W/2 yaw+pi/2 · floor/ceiling lie
flat), yawed to face into the room; non-zero rotation = free manual placement, respected. Wall conventions
already matched the room's walls. Fixes booth (31 decals) + entry-hall (6) automatically. Verified the snap
math against real data (all land on-axis, in-bounds, facing in). Still TODO: crate_type(5)/rack(4) logo
decals (backend only fetches object_type=space; need the face-snap port) + hiphop room has no decals authored.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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