feat v1.28.0: sub-area rooms — manual device placement without an HA area (issue #3)

- area-less rooms appear in the marker room list ('no area, manual'); markers
  store room_id and land at the room centre; dialog reopen restores the choice
- pure parseRoomRef (space#area / space#@roomId) + unit tests; backend schema
- ROADMAP phase 11 closed; TESTING.md row; smoke_subarea.mjs

test/logic.test.mjs

@@ -4,7 +4,7 @@ import {
   lqiColor, snapToGrid, segKey, samePoint, pointInPolygon, markerIdForBinding, averageLqi,
   fitView, declump, safeUrl, resolveTapAction, floorsOf, subst, spaceDisplayOf, roomFillColor,
   segmentCm, formatLength, roomEdges, roomPoly, pointOnBoundary, pointStrictlyInside, roomsOverlap,
-  mergeRooms, splitRoom, polygonArea, closestPointOnBoundary, isActiveState, snapToWall, openingAmount, fillColorsOf, lerpColor, roomFillStyle, stateIcon, lightColorOf, isAlarmState,
+  mergeRooms, splitRoom, polygonArea, closestPointOnBoundary, isActiveState, snapToWall, openingAmount, fillColorsOf, lerpColor, roomFillStyle, stateIcon, lightColorOf, isAlarmState, parseRoomRef,
 } from '../test-build/logic.js';
 import {
   iconFor, compileIconRules, isValidPattern, iconFromDeviceClasses,
@@ -513,3 +513,13 @@ test('isAlarmState: leak/smoke/gas/siren fire; doors and outages do not', () =>
   assert.ok(!isAlarmState('binary_sensor', 'smoke', 'off'));
   assert.ok(!isAlarmState('binary_sensor', 'smoke', 'unavailable'));
 });
+
+test('parseRoomRef: area rooms, sub-area rooms by id, malformed refs', () => {
+  assert.deepEqual(parseRoomRef('f1#kitchen'), { space: 'f1', area: 'kitchen', roomId: null });
+  assert.deepEqual(parseRoomRef('f1#@r7'), { space: 'f1', area: null, roomId: 'r7' });
+  assert.equal(parseRoomRef(''), null);
+  assert.equal(parseRoomRef('f1#'), null);
+  assert.equal(parseRoomRef('f1#@'), null);
+  assert.equal(parseRoomRef('#kitchen'), null);
+  assert.equal(parseRoomRef(null), null);
+});