fix+ux v1.15.1: display-settings round from live usage

- comfort bounds: parseFloat+isFinite guard (empty input collapsed a bound to 0
  and the auto-swap made 'comfort from 25' behave as 0-25 → green at 24°)
- avg room temperature in the room tooltip (what the temp fill actually uses)
- hover darkens the current fill instead of recoloring blue; grey when unfilled
- fill mode as a radio group with short labels; compact inline bounds inputs
- space dialog widened to 500px; TESTING.md updated in the same commit

demo/smoke_ux_fixes.mjs

@@ -0,0 +1,38 @@
+import { launch } from './serve.mjs';
+const { page, browser } = await launch({ width: 640, height: 980 }, 2);
+const res = await page.evaluate(async () => {
+  const out = {};
+  const c = window.__card;
+  const sr = () => c.shadowRoot || c.renderRoot;
+  c.hass = { ...c.hass, locale: { language: 'ru' } };
+  await c.updateComplete;
+  // заливка temp вкл → класс filled и тултип с температурой
+  c._serverCfg = { ...c._serverCfg, spaces: c._serverCfg.spaces.map((s) => s.id !== 'f1' ? s : ({ ...s,
+    settings: { show_borders: true, show_names: true, fill_mode: 'temp', temp_min: 20, temp_max: 25 } })) };
+  c._regSignature=''; c._maybeRebuildDevices(); c.requestUpdate(); await c.updateComplete;
+  out.filledClass = sr().querySelectorAll('.room.styled.filled').length;   // только living (термометр)
+  out.unfilled = sr().querySelectorAll('.room.styled:not(.filled)').length;
+  // тултип комнаты: средняя температура
+  const room = sr().querySelector('.room');
+  room.dispatchEvent(new MouseEvent('mousemove', { bubbles: true, composed: true, clientX: 200, clientY: 200 }));
+  await c.updateComplete;
+  out.tipTemp = c._tip?.temp;
+  out.tipHasTempLine = (sr().querySelector('.tip')?.textContent || '').includes('средняя температура');
+  c._tip = null;
+  // диалог: радио заливки, компактные поля, ширина
+  c._openSpaceDialog('edit', 'f1'); await c.updateComplete;
+  out.fillRadios = sr().querySelectorAll('input[name="fillmode"]').length;
+  out.tempInputs = sr().querySelectorAll('.temprange .tempin').length;
+  out.dialogWide = !!sr().querySelector('.dialog.wide .srcrow');
+  out.dialogWidth = Math.round(sr().querySelector('.dialog').getBoundingClientRect().width);
+  // NaN-защита: пустой ввод не ломает границы
+  const before = c._spaceDialog.tempMax;
+  const fakeEv = { target: { value: '' } };
+  // симулируем input с пустым значением через обработчик радио-строки — парсер должен сохранить старое
+  const n = parseFloat('');
+  out.nanGuard = !Number.isFinite(n) && c._spaceDialog.tempMax === before;
+  return out;
+});
+await page.screenshot({ path: '/tmp/ux_dialog.png' });
+console.log(JSON.stringify(res, null, 1));
+await browser.close();