feat v1.37.0: open boundaries (virtual walls)

- room.open_to symmetric links; 'Open boundary' plan tool toggles the
  shared wall pair under the click (sharedBoundary collinear-overlap
  math + distToSegment pull, same as Split); dashed rendering with an
  amber hot state while the tool is active; Esc -> Draw
- glow: the clip becomes the transitive open zone (openZoneOf BFS,
  either-direction links) + door sectors from the zone's outer walls
- model rooms carry open_to; backend ROOM_SCHEMA open_to: [str]
- +3 unit tests (104), smoke_openwall.mjs (8 checks); docs same-commit

demo/smoke_openwall.mjs

@@ -0,0 +1,51 @@
+import { launch } from './serve.mjs';
+const { page, browser } = await launch();
+const res = await page.evaluate(async () => {
+  const out = {};
+  const c = window.__card;
+  const sr = () => c.shadowRoot || c.renderRoot;
+  c._setMode('plan'); c._tool = 'openwall'; await c.updateComplete;
+  // r1|r2 делят стену x=0.55 → клик по ней открывает границу
+  const H = 1000 / (c._curSpaceCfg.aspect || 1);
+  c._openWallClick([550, 0.25 * H]);
+  await c.updateComplete;
+  const r1 = c._curSpaceCfg.rooms.find((r) => r.id === 'r1');
+  const r2 = c._curSpaceCfg.rooms.find((r) => r.id === 'r2');
+  out.linked = (r1.open_to || []).includes('r2') && (r2.open_to || []).includes('r1');
+  // пунктир отрисован
+  out.dashes = sr().querySelectorAll('.openwall').length > 0;
+  out.hotClass = !!sr().querySelector('.openwalls.hot');
+  // повторный клик закрывает
+  c._openWallClick([550, 0.25 * H]); await c.updateComplete;
+  out.toggledOff = !(c._curSpaceCfg.rooms.find((r) => r.id === 'r1').open_to || []).includes('r2');
+  out.dashesGone = sr().querySelectorAll('.openwall').length === 0;
+  // клик мимо стен — тост, без изменений
+  c._openWallClick([100, 100]);
+  out.missToast = !!c._toast;
+  // снова открыть для glow-теста
+  c._openWallClick([550, 0.25 * H]); await c.updateComplete;
+  // glow: свет из r1 заливает и r2 (clip содержит оба полигона)
+  c._setMode('view'); await c.updateComplete;
+  c._serverCfg = { ...c._serverCfg, spaces: c._serverCfg.spaces.map((s) => s.id !== c._space ? s : ({
+    ...s, settings: { ...(s.settings || {}), fill_mode: 'glow' } })) };
+  const litLight = c._devices.find((d) => d.space === c._space && d.entities.some((e) => e.startsWith('light.') && c.hass.states[e]?.state === 'on'));
+  const c1 = c._roomCenter(c._spaceModel().rooms.find((r) => r.id === 'r1'));
+  const aspect = c._curSpaceCfg.aspect || 1;
+  c._layout = { ...c._layout, [litLight.id]: { s: c._space, x: c1[0] / 1000, y: c1[1] / (1000 / aspect) } };
+  c.requestUpdate(); await c.updateComplete;
+  const clip = sr().querySelector('defs clipPath[id^="hp-glowclip"]');
+  out.zoneClip = clip ? clip.querySelectorAll('path').length >= 2 : false;
+  // транзитивность: r2↔r3 тоже открыть → clip получит 3 полигона
+  const rr2 = c._curSpaceCfg.rooms.find((r) => r.id === 'r2');
+  const rr3 = c._curSpaceCfg.rooms.find((r) => r.id === 'r3');
+  if (rr3) {
+    rr2.open_to = [...(rr2.open_to || []), 'r3'];
+    rr3.open_to = [...(rr3.open_to || []), 'r2'];
+    c._regSignature = ''; c.requestUpdate(); await c.updateComplete;
+    const clip2 = sr().querySelector('defs clipPath[id^="hp-glowclip"]');
+    out.transitive = clip2 ? clip2.querySelectorAll('path').length >= 3 : false;
+  } else out.transitive = 'no r3';
+  return out;
+});
+console.log(JSON.stringify(res, null, 1));
+await browser.close();