diff --git a/demo/smoke_room_settings.mjs b/demo/smoke_room_settings.mjs
index 3448e7c8..3c71611f 100644
--- a/demo/smoke_room_settings.mjs
+++ b/demo/smoke_room_settings.mjs
@@ -198,6 +198,31 @@ const res = await page.evaluate(async () => {
   range.dispatchEvent(new Event('input', { bubbles: true }));
   await c.updateComplete;
   out.scaleWritesOnlyItsOwnKey = JSON.stringify(changedFields(before, draft())) === JSON.stringify(['nameScale']);
+  // Область: меняется только область (и имя, если оно было пустым, — это
+  // давнее поведение селектора, а не набора).
+  before = draft();
+  const areaSelect = sr().querySelector('hp-dialog .areasel');
+  // Свободных зон в фикстуре может не остаться — комната держит единственную.
+  // «Без зоны» доступна всегда, и для проверки соседа этого достаточно: имя уже
+  // заполнено, поэтому автоподстановка имени по зоне в игру не вступает.
+  const values = [...areaSelect.options].map((o) => o.value);
+  const otherArea = c._areaSel ? '' : values.find((v) => v);
+  out.areaOptionAvailable = otherArea !== undefined;
+  areaSelect.value = otherArea;
+  areaSelect.dispatchEvent(new Event('change', { bubbles: true }));
+  await c.updateComplete;
+  out.areaWritesOnlyItsOwnKey = JSON.stringify(changedFields(before, draft())) === JSON.stringify(['area']);
+  // Режим заливки: перетипизированный FILL_CHOICES пишет в _roomFill и, уходя
+  // с «Свой цвет», обнуляет цвет — это его давний контракт (#581), а не сосед.
+  before = draft();
+  const tempRadio = [...sr().querySelectorAll('hp-dialog .srcrow')]
+    .find((l) => l.textContent.trim() === c._t('fill.temp'))?.querySelector('input[type="radio"]');
+  out.fillOptionAvailable = !!tempRadio;
+  tempRadio.checked = true;
+  tempRadio.dispatchEvent(new Event('change', { bubbles: true }));
+  await c.updateComplete;
+  out.fillWritesOnlyItsOwnKey = JSON.stringify(changedFields(before, draft())) === JSON.stringify(['fill'])
+    && c._roomFill === 'temp';
   // Источник влажности: сегмент открывает список и не трогает температуру.
   before = draft();
   const humSeg = segmentOf('hum');
diff --git a/docs/images/screenshots.json b/docs/images/screenshots.json
index ea53f669..0891f9c4 100644
--- a/docs/images/screenshots.json
+++ b/docs/images/screenshots.json
@@ -3,7 +3,7 @@
   "fixture": "synthetic-only",
   "chromium": "151.0.7922.34",
   "oxipng": "oxipng 10.2.0",
-  "sourceFingerprint": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+  "sourceFingerprint": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
   "captureScriptSha256": "9e4b0ae533407fe003a129078aec020f2c83d67cdb6fc6da696ce3d829beaeb5",
   "command": "npm run build && node demo/docs/capture.mjs",
   "scenarios": {
@@ -15,7 +15,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "5d1e816c2fde72316809991e9651e242d3cbcd897fb9db0554dc3bde943486f5"
     },
     "view-touch": {
@@ -26,7 +26,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "bc2001f9cd51715a38ad8d913b1c5a4f2220b3917c8dc03b2de65cfb3f62f808"
     },
     "space-create": {
@@ -37,7 +37,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "9f0970de09772674c3156b9fc5b2d49de0ceb22be11ecf8b136047d37d100a84"
     },
     "room-contour-close": {
@@ -48,7 +48,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "0c354a79f9c3660788b6c5e889a27b6bd78b1f209dc0eef6bb43e2c1344028c4"
     },
     "plan-context-tray": {
@@ -59,7 +59,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "64169c543291bc4df806dcf8ff484b42c8ea55eb343323d945344e0e28f2ce97"
     },
     "device-editor": {
@@ -70,7 +70,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "3c8703175605fcf0387d654cd30783ecfd33e21743e70b45190a5ae1a8d355c2"
     },
     "device-display-preview": {
@@ -81,7 +81,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "5d6193202102f5e6d85567f1111fa105895b933979fbf369c6ba0b1029deb823"
     },
     "background-editor": {
@@ -92,7 +92,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "375900a29aa62632883ede6727b7dbb8b48cabe9d7d0e16425f9779c837f3dd9"
     },
     "room-card": {
@@ -103,7 +103,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "c985783769da1bce50c9abe92ce1c6852d62701ce940f6f0a041d634ac21e888"
     },
     "device-info": {
@@ -114,7 +114,7 @@
       },
       "theme": "dark",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "19e247d5bf49375b238292d45ae32e9eb38a83f5d1a53f6ddde860ed4adcef42"
     },
     "pdf-export": {
@@ -125,7 +125,7 @@
       },
       "theme": "light",
       "language": "en",
-      "sourceSha256": "9b5b6618ac78ca56b3d724f998451dcbff19b20619b8abecd35088aee7a0775a",
+      "sourceSha256": "b678af433a400f150ea1cf4cdb4e585a02e9b5f8e3cd3fa236a78178ffe6de96",
       "imageSha256": "4537692fd57a3ed95528eddd748eee5cb6e456ffab7cc49169853d62459252cd"
     }
   },