feat v1.14.0: per-space display settings, hand-drawn spaces, manual-testing checklist

- space dialog 'Display' section: room borders/names toggles, color+opacity,
  fill by zigbee signal or lights (tri-state: on/off/no-lights)
- draggable room name labels persisted as layout rl_<roomId>
- 'no image, outline by hand' space source with canvas orientation; image
  optional now; switching an existing space to draw detaches its plan
- demo/ synthetic-home harness lives in the repo (serve.mjs + smokes + icons gen)
- docs/TESTING.md checklist (same-commit update policy); self-run found and
  fixed: plan_url not detached on image->draw, _stateClass crash on states
  without entity_id; perf measured (162 devices ~14ms build)
- backend: SPACE_DISPLAY_SCHEMA validation (+test)

demo/serve.mjs

@@ -0,0 +1,28 @@
+// Shared launcher for demo captures: starts headless Chromium serving demo/srv/
+// via request interception (no HTTP server needed). Usage: const {page,browser}=await launch();
+import { chromium } from 'playwright';
+import { readFileSync, existsSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import { dirname } from 'node:path';
+const ROOT = dirname(fileURLToPath(import.meta.url)) + '/srv';
+const CT = { '.html': 'text/html', '.js': 'text/javascript', '.svg': 'image/svg+xml' };
+export async function launch(viewport = { width: 820, height: 760 }, scale = 1) {
+  const browser = await chromium.launch({ args: ['--no-sandbox'] });
+  const page = await (await browser.newContext({ viewport, deviceScaleFactor: scale })).newPage();
+  page.on('pageerror', (e) => console.log('EXC', e.message));
+  await page.route('**/*', (r) => {
+    const u = new URL(r.request().url());
+    let p = decodeURIComponent(u.pathname);
+    if (p === '/') p = '/demo.html';
+    const f = ROOT + p;
+    existsSync(f)
+      ? r.fulfill({ status: 200, headers: { 'content-type': CT[p.slice(p.lastIndexOf('.'))] || 'application/octet-stream' }, body: readFileSync(f) })
+      : r.fulfill({ status: 404, body: 'nf' });
+  });
+  await page.goto('http://demo.local/demo.html', { waitUntil: 'domcontentloaded' });
+  await page.waitForFunction(() => window.__card?._model?.length > 0, { timeout: 9000 });
+  // hass flows continuously in production; the stub sets it once — nudge a rebuild
+  await page.evaluate(() => { const c = window.__card; c.hass = { ...c.hass }; });
+  await page.waitForFunction(() => window.__card._devices.length > 0, { timeout: 9000 });
+  return { page, browser };
+}