v1.44.8: an uploaded plan never reached the config

Found on the owner's install: the image lands in /config/houseplan/plans, the
space keeps plan_url=null, the plan never shows and re-saving does not help.

_saveSpaceDialog held a reference to the space object across the await that
uploads the file. _reloadConfigOnly() — which runs on every
houseplan_config_updated event — REPLACES _serverCfg, so that reference became
an orphan: plan_url, aspect, title and every display setting were written into a
detached object while the save shipped the untouched config. In 'create' mode
the whole new space was lost the same way.

- upload first, then touch the config; no reference is held across an await.
- _saveConfigNow() sets _cfgWriting like the debounced writer, so a revision
  arriving mid-save defers its reload instead of replacing the config (audit L2
  extended to this path).
- demo/smoke_plan_upload_race.mjs: on v1.44.7 the sent config still carries the
  OLD plan_url and the created space is missing; passes here. The demo's
  config/get now returns a fresh object, as a real server does — returning the
  same reference is what hid this class of bug from the smoke layer.
- DEVELOPMENT.md: the deploy target is custom_components/houseplan/frontend/,
  and deploy verification must go over HTTP. A copy placed next to __init__.py
  is served by nobody — that cost two deployments today.
- docs: CHANGELOG.md + CHANGELOG.ru.md + TESTING.md + STATUS.md.

demo/smoke_plan_upload_race.mjs

@@ -0,0 +1,70 @@
+// Загрузка подложки: ссылка обязана долететь до конфига.
+// Баг 2026-07-27 (найден на боевой установке): _saveSpaceDialog держал ссылку
+// на объект пространства через await загрузки файла. Любое событие
+// houseplan_config_updated в этот момент вызывает _reloadConfigOnly(), которое
+// ЗАМЕНЯЕТ _serverCfg — и plan_url/aspect/settings уезжали в осиротевший
+// объект, а на сервер уходил нетронутый конфиг. Симптом: файл на диске есть,
+// подложки нет, пересохранение не помогает.
+import { launch, checkAll, finish } from './serve.mjs';
+const { page, browser } = await launch();
+const res = await page.evaluate(async () => {
+  const out = {};
+  const c = window.__card;
+  const base = c.hass.callWS;
+  let reloadDuringUpload = 0;
+
+  c.hass = { ...c.hass, callWS: async (m) => {
+    if (m.type === 'houseplan/plan/set') {
+      // пока файл «загружается», прилетает чужая ревизия конфига
+      reloadDuringUpload++;
+      await c._reloadConfigOnly(true);
+      return { ok: true, url: '/api/houseplan/content/plans/_/' + m.space_id + '.png?v=42' };
+    }
+    if (m.type === 'houseplan/config/set') { c.__sent = m.config; return { ok: true, rev: 99 }; }
+    if (m.type === 'houseplan/config/get') {
+      // сервер отдаёт СВЕЖИЙ объект, а не тот же самый — как в реальном HA
+      const r = await base(m);
+      return { ...r, config: JSON.parse(JSON.stringify(r.config)) };
+    }
+    return base(m);
+  } };
+
+  // редактирование существующего пространства: подложка + новый заголовок
+  c._openSpaceDialog('edit', 'f1'); await c.updateComplete;
+  c._spaceDialog = { ...c._spaceDialog, title: 'Ground', source: 'file',
+    planFile: { ext: 'png', b64: 'AAAA', aspect: 1.6 } };
+  await c._saveSpaceDialog(); await c.updateComplete;
+
+  out.reloadHappened = reloadDuringUpload === 1;
+  const sentF1 = (c.__sent?.spaces || []).find((s) => s.id === 'f1');
+  const liveF1 = (c._serverCfg?.spaces || []).find((s) => s.id === 'f1');
+  out.sentPlanUrl = sentF1?.plan_url;
+  out.sentAspect = sentF1?.aspect;
+  out.sentTitle = sentF1?.title;
+  out.livePlanUrl = liveF1?.plan_url;
+  out.dialogClosed = c._spaceDialog === null;
+
+  // создание пространства при том же сбое: оно должно доехать целиком
+  c._openSpaceDialog('create'); await c.updateComplete;
+  c._spaceDialog = { ...c._spaceDialog, title: 'Attic', source: 'file',
+    planFile: { ext: 'png', b64: 'BBBB', aspect: 0.8 } };
+  await c._saveSpaceDialog(); await c.updateComplete;
+  const attic = (c.__sent?.spaces || []).find((s) => s.title === 'Attic');
+  out.atticSaved = !!attic;
+  out.atticHasPlan = !!attic && typeof attic.plan_url === 'string' && attic.plan_url.includes('/content/plans/');
+  out.atticAspect = attic?.aspect;
+  return out;
+});
+// зафиксировано прогоном на v1.44.8 и сверено с кодом
+checkAll(res, {
+  reloadHappened: true,
+  sentPlanUrl: '/api/houseplan/content/plans/_/f1.png?v=42',
+  sentAspect: 1.6,
+  sentTitle: 'Ground',
+  livePlanUrl: '/api/houseplan/content/plans/_/f1.png?v=42',
+  dialogClosed: true,
+  atticSaved: true,
+  atticHasPlan: true,
+  atticAspect: 0.8,
+});
+await finish(browser);