test(light): preserve empty render contract and guard late static imports

Follow the render-local barrier wrapper without weakening empty-space or
confirmation assertions. Register the cold-import connection guard mutation.

Issue: #789
User-Visible: no

docs/testing-notes/mutation-browser-guards.md

@@ -17,8 +17,8 @@ to prove that the Node witness actually kills it.
 | Paint, cascade and layer composition | 37 | The invariant depends on computed CSS, SVG paint, clipping, stacking or pixels produced by Chromium. |
 | Pointer geometry and trusted interaction | 47 | The invariant depends on hit testing, pointer capture, touch/keyboard dispatch or live DOM geometry. |
 | Responsive DOM layout | 38 | The invariant depends on measured element boxes, responsive breakpoints, native/HA dialog shells or focusable target size. |
-| Custom-element and HA browser lifecycle | 103 | The invariant crosses Lit/custom-element lifecycle, browser storage/events, lazy loading or a complete HA-card state transition. |
-| **Total** | **233 / 200** | Above the guideline `mutation-gate --check` warns rather than fails (#699); each guard above it is held by its own reason in this inventory and its `because`. |
+| Custom-element and HA browser lifecycle | 104 | The invariant crosses Lit/custom-element lifecycle, browser storage/events, lazy loading or a complete HA-card state transition. |
+| **Total** | **234 / 200** | Above the guideline `mutation-gate --check` warns rather than fails (#699); each guard above it is held by its own reason in this inventory and its `because`. |
 
 ## Measured effect
 
@@ -253,6 +253,7 @@ The invariant crosses Lit/custom-element lifecycle, browser storage/events, lazy
 - `french-locale-wrong-dictionary`
 - `glow-barrier-render-pass-wiring-skipped`
 - `glow-static-led-release-skipped`
+- `glow-static-ready-after-disconnect`
 - `household-enter-stops-acting`
 - `household-marker-drops-keyboard-reach`
 - `hp-dialog-escape-does-not-close`

scripts/mutation-registry.mjs

@@ -14267,6 +14267,17 @@ const MUTANT_DEFINITIONS = [
       replace: '      // mutant: render the new source fully visible before its entry frame',
     }],
   },
+  {
+    id: 'glow-static-ready-after-disconnect',
+    guard: 'node demo/smoke_led_strip_glow.mjs',
+    because: '#789 AC4: a real lazy runtime or field import completing after the static custom element '
+      + 'disconnects must not request a late update; the browser smoke holds its network response across removal',
+    patches: [{
+      file: 'src/space-render.ts',
+      find: '  const ledConnected = o.glowRuntime?.host.isConnected ?? (() => false);',
+      replace: '  const ledConnected = () => true;',
+    }],
+  },
   {
     id: 'glow-static-led-release-skipped',
     guard: 'node demo/smoke_led_strip_glow.mjs',

test/optional-space-model-contract.test.mjs

@@ -76,7 +76,11 @@ test('empty render keeps create/import affordances without spatial layers', () =
 
   // Обёртка: настоящий `nothing` пробрасывается как есть. `noChange` вложен в
   // стабильный shell: так тело остаётся, а соседний confirm можно убрать.
-  const wrapper = methodBody('render');
+  // #789: внешний render ограничивает кэш барьеров одним проходом; контракт
+  // пустого тела и подтверждения остаётся во внутренней обёртке.
+  assert.match(methodBody('render'),
+    /return this\._lightBarrierPass\.run\(\(\) => this\._renderLightPass\(\)\);/);
+  const wrapper = methodBody('_renderLightPass');
   assert.match(wrapper, /const body = this\._renderBody\(\);/);
   assert.match(wrapper, /if \(body === nothing\) return body;/);
   assert.match(wrapper, /return this\._renderRoot\(body\);/);