feat v1.42.1: room-card font sizes — 3 sliders with a live preview

- space.settings.card_font_scale (tier 2 base) + room.settings
  name_scale/label_scale (tier 3), 50-300%, multiplied together and
  stacking with resize-k and kiosk per-screen multipliers
- live sample card in both the space and room dialogs
- backend schema; smoke_font_scales.mjs (9 checks); docs same-commit

demo/smoke_font_scales.mjs

@@ -0,0 +1,58 @@
+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;
+  const spId = c._space;
+  c._serverCfg = { ...c._serverCfg, spaces: c._serverCfg.spaces.map((s) => s.id !== spId ? s : ({
+    ...s, settings: { ...(s.settings || {}), show_names: true, label_temp: true } })) };
+  c._setMode('view'); c.requestUpdate(); await c.updateComplete;
+  await new Promise((r) => setTimeout(r, 100));
+  const lbl = () => sr().querySelector('.roomlabel');
+  const nameSize = () => parseFloat(getComputedStyle(lbl().querySelector('.rlname')).fontSize);
+  const metaEl = () => lbl().querySelector('.rlmetrics');
+  const n0 = nameSize();
+  const m0 = metaEl() ? parseFloat(getComputedStyle(metaEl()).fontSize) : null;
+  out.baseline = n0 > 0;
+  // 1) пер-комнатный name_scale ×2 — имя удвоилось, подписи нет
+  const room = c._curSpaceCfg.rooms.find((r) => r.name && r.area);
+  room.settings = { ...(room.settings || {}), name_scale: 2 };
+  c.requestUpdate(); await c.updateComplete;
+  const lblR = [...sr().querySelectorAll('.roomlabel')].find((l) => l.textContent.includes(room.name));
+  const n1 = parseFloat(getComputedStyle(lblR.querySelector('.rlname')).fontSize);
+  out.nameDoubled = Math.abs(n1 / n0 - 2) < 0.05;
+  const meta1 = lblR.querySelector('.rlmetrics');
+  out.metaUntouched = meta1 ? Math.abs(parseFloat(getComputedStyle(meta1).fontSize) - m0) < 0.5 : 'no-meta';
+  // 2) label_scale ×2 — подписи удвоились
+  room.settings.label_scale = 2;
+  c.requestUpdate(); await c.updateComplete;
+  const meta2 = lblR.querySelector('.rlmetrics');
+  out.metaDoubled = meta2 && m0 ? Math.abs(parseFloat(getComputedStyle(meta2).fontSize) / m0 - 2) < 0.05 : 'no-meta';
+  // 3) базовый множитель пространства ×1.5 — умножает всё
+  c._serverCfg = { ...c._serverCfg, spaces: c._serverCfg.spaces.map((s) => s.id !== spId ? s : ({
+    ...s, settings: { ...(s.settings || {}), card_font_scale: 1.5 } })) };
+  c.requestUpdate(); await c.updateComplete;
+  const lblR2 = [...sr().querySelectorAll('.roomlabel')].find((l) => l.textContent.includes(room.name));
+  const n2 = parseFloat(getComputedStyle(lblR2.querySelector('.rlname')).fontSize);
+  out.spaceMultiplies = Math.abs(n2 / n0 - 3) < 0.1; // 2 × 1.5
+  // 4) диалог комнаты: слайдеры + живой пример реагирует
+  c._setMode('plan'); await c.updateComplete;
+  const model = c._spaceModel().rooms.find((r) => r.id === room.id);
+  c._openRoomEdit(model); await c.updateComplete;
+  out.slidersPrefilled = c._roomNameScale === 2 && c._roomLabelScale === 2;
+  const pv = () => sr().querySelector('.cardpreview .cpname');
+  const p0 = parseFloat(pv().style.fontSize);
+  c._roomNameScale = 1; c.requestUpdate(); await c.updateComplete;
+  const p1 = parseFloat(pv().style.fontSize);
+  out.previewLive = Math.abs(p0 / p1 - 2) < 0.05;
+  c._roomDialogCancel(); await c.updateComplete;
+  // 5) превью есть и в диалоге пространства
+  c._openSpaceDialog('edit', spId); await c.updateComplete;
+  out.spacePreview = !!sr().querySelector('.cardpreview');
+  out.spaceSlider = [...sr().querySelectorAll('.dialog label')].some((l) => l.textContent === c._t('space.card_font'));
+  c._spaceDialog = null; await c.updateComplete;
+  return out;
+});
+console.log(JSON.stringify(res, null, 1));
+await browser.close();