feat v1.26.0: state-reflecting icons + 'value instead of an icon' display (issue #3)

- stateIcon(): door/window/garage open-closed, lock locked-unlocked, bulb on;
  custom icons and unavailable/unknown never morph; gated by live_states
- marker display 'value': the measurement (with unit) is the marker body,
  corner badges hidden; numeric fallback chain temp - hum - primary state
- TESTING.md rows, smoke_state_value.mjs, +1 unit test

demo/smoke_state_value.mjs

@@ -0,0 +1,34 @@
+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 devIcon = (id) => {
+    const idx = c._devices.filter((x) => x.space === c._space).findIndex((x) => x.id === id);
+    const el = sr().querySelectorAll('.dev')[idx];
+    return el?.querySelector('ha-icon')?.getAttribute('icon');
+  };
+  // 1) state-иконки: замок locked → mdi:lock; unlocked → lock-open-variant
+  out.lockLocked = devIcon('d_lock');
+  c.hass = { ...c.hass, states: { ...c.hass.states, 'lock.front_door': { ...c.hass.states['lock.front_door'], state: 'unlocked' } } };
+  await c.updateComplete;
+  out.lockUnlocked = devIcon('d_lock');
+  // окно: on → window-open
+  out.windowOpen = devIcon('d_window');
+  c.hass = { ...c.hass, states: { ...c.hass.states, 'binary_sensor.window': { ...c.hass.states['binary_sensor.window'], state: 'off' } } };
+  await c.updateComplete;
+  out.windowClosed = devIcon('d_window');
+  // лампа on → lightbulb-on
+  out.bulbOn = devIcon('d_light1');
+  // 2) display:value у термометра
+  c._serverCfg = { ...c._serverCfg, markers: [{ id: 'd_temp', binding: 'device:d_temp', display: 'value' }] };
+  c._regSignature = ''; c._maybeRebuildDevices(); c.requestUpdate(); await c.updateComplete;
+  const vd = [...sr().querySelectorAll('.dev.valonly')];
+  out.valonly = vd.length;
+  out.valText = vd[0]?.querySelector('.valtext')?.textContent.trim();
+  out.noSmallBadge = !vd[0]?.querySelector('.tval');
+  return out;
+});
+console.log(JSON.stringify(res, null, 1));
+await browser.close();