A wall can only exist as an edge of a closed room:
- roomEdges(rooms) derives walls from room outlines, deduping shared ones, so deleting a
room keeps the borders its neighbours still contribute and drops the rest — the rule
falls out of the model instead of needing bookkeeping.
- Nothing is persisted while drawing: an outline you never close leaves no lines behind
(previously every click pair was written to space.segments immediately).
- The 'Erase line' tool is gone; space.segments is stripped on every save (validation
still tolerates it on read so a stale tab cannot fail a save).
- Dead code out: _addSegment/_removeSegmentByKey/_distToSeg/_pathSegs/_segKey.
Docs (ARCHITECTURE/TESTING/CHANGELOG) updated in the same commit. +2 tests (63).
- All card UI strings moved to src/i18n.ts (en/ru); language follows the HA
profile automatically, new 'language: en|ru' card option forces it; GUI
editor localized and got the language dropdown; generated device names
localized via BuildCtx.loc.
- English-only codebase: comments, docstrings, test names, backend error
messages and logs. Russian remains only in the ru dictionary, ru.json,
iconFor regexes matching Russian device names (+their fixtures) and README.ru.md.
- Docs English-first: README (EN) + README.ru.md, ARCHITECTURE/DEVELOPMENT/
ROADMAP/CHANGELOG fully translated; translations/en.json had Russian - fixed.
- Removed obsolete RELEASE_NOTES_v1.9.3.md and scripts_publish.sh.
Matysh