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perf(light): reduce LED gradient paint only during scale changes

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Retain the 48-band DOM and exact idle raster, paint 24 midpoint bands during actual zoom, and restore after 160 ms. Keep input, HA and lifecycle guards observable; measure the full camera/restore/restart cycle without relaxing historical budgets.

Issue: #789
User-Visible: yes
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Matysh
2026-10-04 15:54:34 +03:00
parent 96f89717bd
commit 80cba30895
26 changed files with 1127 additions and 14 deletions
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docs/testing-notes/mutation-browser-guards.md
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@@ -14,11 +14,11 @@ to prove that the Node witness actually kills it.
| --- | ---: | --- |
| Performance threshold | 4 | The witness measures real browser wall-time or frame work; a pure assertion cannot prove the budget. |
| Browser harness integrity | 4 | The mutation breaks page-error, round-trip or page-registration observation in the browser harness itself. |
| 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. |
| Paint, cascade and layer composition | 38 | The invariant depends on computed CSS, SVG paint, clipping, stacking or pixels produced by Chromium. |
| Pointer geometry and trusted interaction | 49 | 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 | 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`. |
| **Total** | **237 / 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
@@ -94,6 +94,7 @@ The invariant depends on computed CSS, SVG paint, clipping, stacking or pixels p
- `iso-theme-dark-wall-rule-returns`
- `led-badge-dropped`
- `led-core-white-under-glow`
- `led-zoom-coarse-midpoint-wrong`
- `led-field-endpoint-dropped`
- `led-field-disc-cancels-fan`
- `led-field-compound-clip-children`
@@ -132,6 +133,8 @@ The invariant depends on hit testing, pointer capture, touch/keyboard dispatch o
- `furniture-wall-runtime-drops-raw-intent`
- `led-pan-adds-point`
- `led-pinch-calls-action`
- `led-zoom-quality-never-coarse`
- `led-zoom-noop-clears-lease`
- `live-pinch-compositor-demoted-on-active-lit-commit`
- `opening-dimension-overlay-hidden`
- `opening-search-hides-none`