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

demo/smoke_subarea.mjs

@@ -0,0 +1,35 @@
+import { launch } from './serve.mjs';
+const { page, browser } = await launch();
+const res = await page.evaluate(async () => {
+  const out = {};
+  const c = window.__card;
+  // комната без зоны на f1
+  c._serverCfg = { ...c._serverCfg, spaces: c._serverCfg.spaces.map((s) => s.id !== 'f1' ? s : ({
+    ...s, rooms: [...s.rooms, { id: 'rc', name: 'Cupboard', area: null, poly: [[0.05,0.62],[0.2,0.62],[0.2,0.9],[0.05,0.9]] }],
+  })) };
+  c._regSignature = ''; c._maybeRebuildDevices(); await c.updateComplete;
+  // список комнат в диалоге содержит подзону
+  c._setMode('devices');
+  c._openMarkerDialog(); await c.updateComplete;
+  const rooms = c._allRoomsFlat();
+  out.subareaListed = rooms.some((r) => r.value === 'f1#@rc');
+  // создать виртуальный маркер в подзону
+  c._markerDialog = { ...c._markerDialog, name: 'Vacuum dock', binding: 'virtual', room: 'f1#@rc' };
+  await c._saveMarker(); await c.updateComplete;
+  const m = c._serverCfg.markers.find((x) => x.name === 'Vacuum dock');
+  out.markerRoomId = m?.room_id;
+  out.markerAreaNull = m ? m.area === null : null;
+  // позиция — в центре подзоны (норм. центр rc: x=0.125, y=0.76)
+  const pos = c._layout[m.id];
+  out.posInRoom = pos && Math.abs(pos.x - 0.125) < 0.03 && Math.abs(pos.y - 0.76) < 0.03;
+  // девайс отрисован
+  const dev = c._devices.find((d) => d.id === m.id);
+  out.deviceBuilt = !!dev && dev.space === 'f1';
+  // reopen диалога восстанавливает выбор
+  c._openMarkerDialog(dev); 
+  out.reopenRoom = c._markerDialog?.room;
+  c._markerDialog = null;
+  return out;
+});
+console.log(JSON.stringify(res, null, 1));
+await browser.close();