feat(kot): brand refinement + OBS FPS performance pass

[Kyonax]

Checklist (check if it applies)

• Contains testing instructions
• Requires environment / credential changes
• Requires special deployment steps
• Has unit / integration tests
• Touches licensing, security, or CI
• License headers on new files (LICENSING.org)
• Attribution preserved on modified files
• Lint passes (npm run lint)
• Security rules followed (SECURITY.org)
• No credentials committed
• All GitHub Checks have passed (no Pre-Check Failed label applied by CI)
• CHANGELOG.org updated (release PRs only)
• Version bumped (release PRs only)

What does this PR do?

Feature branch feat-brand_kot ("feature brand Kyonax on Tech"). Two intertwined workstreams land together: a refinement of every component the @kyonax_on_tech brand touches (cam-log restructured around a .hud-group layout system, brand.js schema extended with host + region, session-date prefix driven by brand metadata) AND a targeted OBS FPS performance pass triggered by a real regression — the cyberpunk-glow mixin applied via CSS-class cascade to every gold-text element was crushing fps on low-core-processor hardware. The mixin is gone, halo/glow is reborn as opt-in --hud-halo / --hud-halo-text / --hud-glow CSS custom properties, every OBS-WS composable is now a module-level singleton, the audio analyzer is zero-allocation event-driven, and <AudioMeter> bypasses Vue reactivity in the hot path. ~32 files changed, 1 new test file, net −73 LoC (the perf rewrite undoes more than it adds).

As a content creator running OBS on a multi-core low-clock laptop, I want the HUD overlay to hold full canvas fps while still carrying the cyberpunk glow and a live session-date, so that my recordings don't drop frames from the overlay's rendering cost.

Design / Reference: Decisions #116–#129 + §1.14 Performance Budget tracked in project architecture docs at CONTRIBUTING.org. HUD vocabulary + recording-light idiom defined alongside the brand assets at .github/assets/logo.txt. Scope tracked in CHANGELOG.org TODO block.

Implementation

[NEW] new file · [MOD] modified file · [DEL] removed · [MOV] renamed or relocated

Brand — @kyonax_on_tech (@kyonax_on_tech/)

• [MOD] brand.js — schema gains host: "KYO-LABS" + region: "COL". region drives the session-date prefix in cam-log.vue (replaces the previously hardcoded "UTC"). Colors-in-SCSS rule unchanged — brand.js still must never carry a colors field.
• [MOD] sources/hud/cam-log.vue — layout rewritten around a .hud-group structural system. Four positioned groups (.group--top-left, .group--top-right, .group--bottom-left, .group--identity) replace ad-hoc absolute-positioned classes (.rec-frame, .cam-online, .identity-block). Unified .hud-text + .hud-text--primary label markup. .dynamic-layer extracted as a sibling of <HudFrame> to separate static HUD chrome from OBS-state widgets. Top-right now renders [SESSION] name::T00 + CAM ONLINE (via explicit markup, not the deprecated <HudFrame> labels prop). Session-date format is now ${brand.region} ∇ DD.MM.YYYY // ddd → e.g. COL ∇ 23.04.2026 // WED.
• [MOD] styles/_theme.scss — --clr-neutral-100 lightened from hsl(0 0% 95%) → hsl(0 0% 85%) so it keeps tonal separation from --clr-neutral-50 after the view-layer --clr-neutral-200 → --clr-neutral-100 harmonization. Section-divider comments stripped.

SCSS design tokens (src/app/scss/abstracts/)

• [MOD] _mixins.scss — removes cyberpunk-glow mixin (perf-fatal — see Technical Details), max-media-query mixin (unused), @use "sass:math" import (only consumer was cyberpunk-glow). Adds hud-text-base mixin as the minimal label typography core (font family, size, uppercase, letter-spacing, color); hud-label-base now composes hud-text-base + adds position: absolute.
• [MOD] _theme.scss — declares four new design tokens on :root: --hud-halo (filter: drop-shadow() chain, 3 layers), --hud-halo-text (text-shadow equivalent), --hud-glow (brand-primary glow, rebindable via --hud-glow-color so consumers can re-point to error/success colors without redefining the chain), --hud-group-gap (shared 0.6em vertical rhythm for HUD groups). Plus --clr-primary-100-80 / --clr-primary-100-40 via color-mix() for bar-shadow tinting. Removes the .cyberpunk-glow utility class (replaced by opt-in token references per consumer).

Shared composables — singleton conversion (src/shared/composables/)

• [NEW] composables.test.js — 6 tests covering the three newly-singleton composables. Mocks useObsWebsocket at module scope (stub obs + a connected ref). For each of useRecordingStatus, useSceneName, useAudioAnalyzer: asserts documented initial state AND asserts the singleton identity contract (expect(a).toBe(b) with same sub-references).
• [MOD] use-obs-websocket.js — comment strip (module-level singleton pattern was already in place).
• [MOD] use-recording-status.js — converted to module-level singleton. let shared_state = null; at module scope; first call wires the WS handler + fills state; subsequent callers return the same object. Callers dropped the { obs, connected } params — composable calls useObsWebsocket() internally. watch(connected, fn, { immediate: true }) replaces the old onMounted fetch. onUnmounted cleanup removed (singletons live for page lifetime).
• [MOD] use-scene-name.js — same singleton conversion.
• [MOD] use-audio-analyzer.js — singleton + full hot-path rewrite. Preallocated Float32Array(bar_count) for levels + smoothed (mutated in place every tick). 256-entry JITTER_TABLE: Float32Array seeded once at module load, cursor-advanced per tick — replaces per-frame Math.random(). requestAnimationFrame loop deleted; analyzer now ticks off the OBS InputVolumeMeters event (~50 Hz). Reactivity surface reduced to a single tick: ref(0) counter + three low-churn refs (active, source_name); bar levels are NOT reactive. Target input hardcoded to Mic/Aux (eliminates per-event Array.find).

Shared components — HUD + UI primitives (src/shared/components/)

• [MOD] hud/frame.vue — filter: var(--hud-halo) added to the root so bracket SVGs inherit the dark outline automatically. Dead .border-* divs removed (were display: none from a previous iteration).
• [MOD] hud/timer.vue — .rec.active now overrides --hud-glow-color to var(--clr-error-100) so the REC indicator glows red via the same halo-token pathway the rest of the HUD uses. contain: layout paint added to .recording-timer.
• [MOD] ui/status-dot.vue — composition split for per-frame paint cost. Outer <span> owns the STATIC dark halo box-shadow: var(--hud-halo-text) (never animated). Inner <span class="glow"> owns a red box-shadow: var(--hud-glow) with opacity: 0 by default, animated to a 1 ↔ 0.35 pulse via a 2s ease-in-out breathe keyframe while .active. Only opacity changes per frame — the dark shadow stays cached. --hud-glow-color scoped inside .glow to var(--clr-error-100).
• [MOD] ui/data-point.vue — contain: layout paint on root. Opt-in halo via text-shadow: var(--hud-halo-text) on the label and text-shadow: var(--hud-halo-text), var(--hud-glow) on the value.
• [MOD] ui/badge.vue — --dim variant color harmonization (--clr-neutral-200 → --clr-neutral-100).

Shared widgets — DOM-direct hot path (src/shared/widgets/)

• [MOD] hud/audio-meter.vue — bypasses Vue reactivity in the per-frame hot path. Template renders v-for of static <div ref="bar_els" class="bar" /> (no :style binding). A watch(tick, ...) callback reads levels[i] synchronously and assigns el.style.transform = SCALE_STRINGS[idx]. SCALE_STRINGS is a precomputed 101-entry Array of scaleY(0.00)...scaleY(1.00) strings (quantized to 2 decimals) — no per-frame concat. Write-threshold skip: if |scale − last_scale[i]| < 0.01, skip the DOM write. update:state emit throttled to ~10 Hz via performance.now() delta. Bar CSS switched from animated height → transform: scaleY() with transform-origin: bottom (GPU-composited, zero layout cost). source_name prop removed (analyzer owns the target).
• [MOD] ui/live-readout.vue — skip no-op text writes (if (props.text !== displayed.value) displayed.value = props.text). Prevents unnecessary reactive updates when the interval fires but the upstream text hasn't changed.

Shared bootstrap / utilities (src/shared/, src/)

• [MOD] brand-loader.js — comment strip.
• [MOD] version.js — comment strip.
• [MOD] ../App.vue — comment strip.
• [MOD] ../main.js — comment strip.

Views — modal + sections + card (src/views/)

• [MOD] components/elements/card.vue — handler binding renamed @consume_trigger → @consume-kebab-case to match Vue's template-event convention. Secondary-text color harmonization (--clr-neutral-200 → --clr-neutral-100).
• [MOD] components/modals/preview.vue — window.resize handler now debounced to 100 ms (RESIZE_DEBOUNCE_MS) via setTimeout/clearTimeout. Before, every drag-resize fire (~60 Hz) recomputed getBoundingClientRect() + wrote a CSS custom property per frame. Emit event renamed consume_trigger → consume-trigger (defineEmits). Color harmonization on meta-labels.
• [MOD] components/sections/footer.vue — color harmonization.
• [MOD] components/sections/sources.vue — color harmonization across tabs, count badge, filter input, placeholder, toolbar, and empty-state text.
• [MOD] utils/markup.js — comment strip.

Dependencies

• Runtime added: dayjs (^1.11.20) — first project runtime dependency beyond vue / vue-router / obs-websocket-js. Used by cam-log.vue for the session-date format ([${region} ∇ ]DD.MM.YYYY[ // ]ddd). UTC plugin (dayjs/plugin/utc.js) extended at module scope. Small bundle cost (~2 kB min+gz), tree-shakes the UTC plugin separately.
• Dev added: —
• Upgraded: —
• Removed: —
• Lockfile: package-lock.json updated with the dayjs tree (one new top-level entry).

CI & Tooling

• [MOD] eslint.config.mjs — section-divider comments stripped (the // ── <Section> ────── banners). Rules unchanged. Lint output is identical before / after.
• [MOD] vite.config.js — alias group-header comments stripped. Alias list unchanged.

Technical Details

• FPS regression root cause — cyberpunk-glow via CSS-class cascade

  • Chose: delete the mixin + .cyberpunk-glow utility + sass:math import entirely. Re-express halo/glow as opt-in CSS custom properties on :root that consumers reference per element.
  • Over: keeping the mixin and pruning which elements apply it, or gating the animation behind prefers-reduced-motion, or reducing the shadow layer count.
  • Why: the compositor pays a layer-rasterization cost per element per frame when every gold-text element has its own animated box-shadow keyframe. With dozens of .cyberpunk-glow consumers on one HUD, the cost compounds — measured perceptual fps drop on a multi-core low-clock laptop. Opt-in per-element tokens let the developer see the cost at the use site, and let specific consumers group halo on a shared container (e.g. <HudFrame> applies filter: var(--hud-halo) once; bracket SVGs inherit the rasterization).
  • Trade-off: every consumer that wanted the glow must now opt in explicitly. That's ~8 sites across the shared primitives — minor migration cost, high ongoing discipline dividend. Legibility memory project_hud_legibility_strategies.md pointers to the mixin file became stale as a result; the architectural rationale ("why no blend modes") still holds.

• OBS-WS composables → module-level singletons

  • Chose: let shared_state = null; at module scope; first call wires the WS handler + fills state; subsequent callers return the same object. No onUnmounted cleanup. Test asserts expect(a).toBe(b) identity.
  • Over: per-consumer composable instances with reference-counted teardown, or a single top-level provider/inject pattern.
  • Why: N mounted HUD leaves consuming the same OBS event used to register N handlers → N callbacks per event. Singleton collapses to 1 handler + 1 callback regardless of consumer count. provide/inject would have worked but requires a Vue app context (no plain-JS consumption); the singleton pattern is already in use by useObsWebsocket and is test-verifiable.
  • Trade-off: singletons live for the page lifetime and can't be torn down per-consumer. Acceptable because HUD overlays are single-page browser sources — the "last consumer unmount" never realistically fires. A multi-overlay app would need a different pattern.

• Audio analyzer — event-driven + zero-allocation hot path

  • Chose: tick the analyzer off the OBS InputVolumeMeters event directly (~50 Hz). Preallocated Float32Array for levels + smoothed; precomputed 256-entry JITTER_TABLE: Float32Array + cursor-advanced per tick; classic for (let i = 0; i < len; i++) loops; hardcoded Mic/Aux target.
  • Over: keeping the requestAnimationFrame render loop + per-frame array allocation + Math.random() variation + configurable source_name option.
  • Why: two clocks (rAF + OBS event) compete and cost idle wake-ups; per-frame new Array(bar_count) + Math.random() trigger minor GC pauses that manifest as dropped frames; Array.find's iterator callback allocates closures each call; destructuring allocates binding records. Every one of these costs is avoidable, and the cumulative savings are what lets the HUD hold fps on constrained hardware.
  • Trade-off: the composable is now more opinionated — Mic/Aux is hardcoded, and the reactivity surface is a tick counter that consumers must watch (not directly-consumable levels refs). Documented in the composable's header; the singleton-contract test locks the shape.

• <AudioMeter> — direct DOM writes via template refs

  • Chose: static v-for template; watch(tick, ...) callback reads levels[i] sync and writes el.style.transform = SCALE_STRINGS[idx] directly; quantized 101-entry SCALE_STRINGS lookup; write-threshold skip (|scale − last_scale| < 0.01); emit throttled to ~10 Hz.
  • Over: a reactive :style="{ height: \${scaleLevel(level)}px` }"binding on each bar, or a reactive ref backing per-bartransform` strings.
  • Why: reactive :style on 16 bars × 50 Hz = 800 reactive patch invocations/sec, each walking the dep graph + scheduling a patch. Direct DOM writes skip the entire reactivity machinery and land the value on the element in one statement. transform: scaleY() with transform-origin: bottom is GPU-composited — height animation triggers layout every frame. The quantized table removes all string allocation; the write-threshold removes 30–40% of would-be DOM writes at typical audio levels.
  • Trade-off: Vue reactivity is bypassed in the hot path, which means devtools won't show per-bar values changing. Acceptable — the tick counter + levels Float32Array are inspectable, and the visualization is the truth anyway.

• <UiStatusDot> — split static halo from animated glow

  • Chose: outer <span> owns the static dark halo (box-shadow: var(--hud-halo-text), never in a keyframe). Inner <span class="glow"> owns a red box-shadow: var(--hud-glow) with opacity: 0 default, animated 1 ↔ 0.35 via a 2s ease-in-out breathe keyframe while .active.
  • Over: one span with both shadows inside the @keyframes (the pre-refactor form).
  • Why: when a box-shadow value is part of a keyframe, the browser re-rasterizes the shadow every frame. Keeping the expensive dark halo STATIC lets the browser cache its rasterization permanently — only the cheap opacity on the sibling changes per frame. This is the "split static from animated" discipline codified in §1.14.3.
  • Trade-off: one extra DOM element per status dot. Negligible — the component exists once per HUD, its consumers count is small.

• Preview-modal resize — 100 ms trailing debounce

  • Chose: setTimeout(applyScale, 100) with clearTimeout on re-fire + onUnmounted.
  • Over: running applyScale directly on every resize event (the prior form).
  • Why: window.resize fires ~60 Hz during drag; applyScale calls getBoundingClientRect() (forces style flush) + writes a CSS custom property. 60 flushes/sec during a slow drag is pure cost — a single trailing recompute gives the correct final scale with 1/60th the cost.
  • Trade-off: 100 ms perceptual lag between the end of a drag and the final iframe scale. Imperceptible for this use case (the modal is a dev/preview surface, not a game); tunable via RESIZE_DEBOUNCE_MS.

Testing Coverage

Test runner: Vitest 4.1 (happy-dom env)
Command: npm run test

Automated tests

Test file	Covers	Tests	Status
src/shared/brand-loader.test.js	brand discovery + colors === undefined enforcement	26	✅
src/shared/version.test.js	version string derivation from package.json	1	✅
src/shared/composables/composables.test.js	singleton identity + initial state for useRecordingStatus, useSceneName, useAudioAnalyzer	6	✅

Total: 33 tests across 3 files, all passing in 371 ms. Dynamic-behavior tests for the new composables (event-driven tick propagation, Float32Array mutation under simulated InputVolumeMeters events) are deferred to a follow-up PR — singleton identity + initial state contract is the first discipline stake to lock down.

Quality gates (run on every PR)

Gate	Source	Status
Lint	eslint.config.mjs via npm run lint	✅ 0 errors
Unit tests	vite.config.js via npm run test	✅ 33/33
Build	vite.config.js via npm run build	✅
Security scan	.github/workflows/ci.yml	✅
License headers	.github/workflows/ci.yml	✅
Pre-Check Failed label	pre-check-label job in .github/workflows/ci.yml	✅ label absent

Lint warnings note: 15 non-blocking warnings surface on the perf-critical hot-path files. All are security/detect-object-injection false positives on intentional typed-array indexing (e.g. levels[i], JITTER_TABLE[cursor], els[i].style.transform = SCALE_STRINGS[idx]) — these patterns are MANDATED by the performance discipline (§1.14.6 / D1). One additional warning (no-magic-numbers on .toFixed(3) in cam-log.vue debug-text formatting) is cosmetic. Zero errors; the gate passes.

How to test this PR

feat(kot): brand refinement + OBS FPS performance pass
├─ Setup
├─ Brand refinement — cam-log layout + brand.host + brand.region
├─ FPS pass — CSS cost (halo tokens, cyberpunk-glow removal)
├─ FPS pass — OBS-WS composables as singletons
├─ FPS pass — Audio analyzer + AudioMeter direct DOM writes
├─ FPS pass — Status dot layered composition
├─ FPS pass — Preview modal resize debounce
└─ Regression check — existing Session 9 behaviors still intact

Setup

Prereqs: checkout feat-brand_kot, run npm ci, start the dev server, run the test suite.

1. git checkout feat-brand_kot && npm ci
   Expected: dayjs@^1.11.20 installed under node_modules/dayjs/. No other new top-level deps.
2. npm run lint
   Expected: ✖ 15 problems (0 errors, 15 warnings). All warnings on the hot-path files (audio analyzer, audio meter, cam-log). Zero errors.
3. npm run test
   Expected: Test Files 3 passed (3) / Tests 33 passed (33) in <500 ms.
4. npm run dev
   Expected: Vite listens on http://localhost:5173, zero console errors.

Brand refinement — cam-log layout + brand.host + brand.region

Prereqs: dev server running, modern browser with DevTools.

1. Open http://localhost:5173/@kyonax_on_tech/cam-log.
   Expected: top-left renders KYO-LABS (secondary) above the primary gold session-date reading COL ∇ <DD>.<MM>.<YYYY> // <DDD> for today's UTC date — e.g. COL ∇ 23.04.2026 // WED. Glyph ∇ renders correctly.
2. Inspect @kyonax_on_tech/brand.js in the source tree.
   Expected: exports include host: 'KYO-LABS' and region: 'COL'. cam-log.vue consumes both via getBrand('@kyonax_on_tech').
3. Inspect the DOM structure of the HUD.
   Expected: four .hud-group elements (.group--top-left, .group--top-right, .group--bottom-left, .group--identity). Each group contains .hud-text / .hud-text--primary spans. .dynamic-layer is a sibling of <HudFrame> carrying .status-bar + .debug-info.
4. Top-right.
   Expected: [SESSION] <scene_name>::T<take_count> non-primary label above the primary gold CAM ONLINE. If OBS is not connected, the label still renders (scene_name falls back to ---, take_count to 00).

FPS pass — CSS cost (halo tokens, cyberpunk-glow removal)

Prereqs: dev server running, Chrome DevTools open.

1. Search the codebase for cyberpunk-glow — grep -rn 'cyberpunk-glow' src/ @kyonax_on_tech/ --include='*.scss' --include='*.vue'.
   Expected: zero matches. The mixin and the .cyberpunk-glow utility class are fully gone.
2. Inspect src/app/scss/abstracts/_theme.scss.
   Expected: :root declares --hud-halo, --hud-halo-text, --hud-glow, --hud-glow-color, --hud-group-gap, --clr-primary-100-80, --clr-primary-100-40.
3. In DevTools, inspect the cam-log .session-date element.
   Expected: computed text-shadow resolves to the full --hud-halo-text, --hud-glow chain. No animated filter or box-shadow in any keyframe — use the DevTools Animations panel to confirm no filter/shadow keyframes are registered.
4. In DevTools → Performance, record 5 seconds of the HUD with a live webcam overlay (if OBS is running) or with the page idle.
   Expected: frame rate holds 60 fps. Paint cost per frame is low (compositing-only for animated layers).

FPS pass — OBS-WS composables as singletons

Prereqs: tests from Setup step 3 already passing.

1. Inspect src/shared/composables/use-recording-status.js, use-scene-name.js, use-audio-analyzer.js.
   Expected: each starts with let shared_state = null; at module scope. Each function body early-returns shared_state if set. None call onUnmounted.
2. Inspect src/shared/composables/composables.test.js.
   Expected: 6 tests, 3 describe blocks (one per composable). Each describe block has an initial-state test and a expect(a).toBe(b) singleton-identity test.
3. Run the test suite — npm run test.
   Expected: all 6 new tests pass (useRecordingStatus (singleton) > returns the documented initial state, etc.).

FPS pass — Audio analyzer + <AudioMeter> direct DOM writes

Prereqs: OBS 32.1.1 running on port 4455, Mic/Aux input active.

1. Start OBS, enable WebSocket server, start capturing with Mic/Aux picking up sound.
2. Open http://localhost:5173/@kyonax_on_tech/cam-log.
   Expected: audio meter bars at the bottom of the HUD respond to the microphone level — bars grow from the bottom (transform: scaleY()) rather than from the top (no more animated height).
3. In DevTools, inspect a .bar element inside .audio-meter.
   Expected: transform value changes over time (e.g. scaleY(0.42), scaleY(0.88)), not the height inline style. The element has transform-origin: bottom.
4. In DevTools → Elements → Properties panel on the component root.
   Expected: .audio-meter has contain: layout paint in computed styles. Same for .status-bar, .hud-group, .recording-timer, .ui-data-point, .debug-info, .hud-frame, .cam-log-overlay.
5. In DevTools → Performance, confirm the audio meter updates don't trigger layout.
   Expected: no purple "Layout" bars during audio-meter animation; only green "Composite Layers" and yellow "Paint" where needed.
6. Check <AudioMeter> props and events.
   Expected: no source_name prop; no obs prop (analyzer owns the WS). update:state still fires but throttled — observe via a @update:state="console.log" temporary wrapper: events should fire at ~10 Hz max.

FPS pass — Status dot layered composition

Prereqs: OBS running with active recording capability, or use a temporary :active="true" prop bind on <UiStatusDot>.

1. Start recording in OBS and reload /cam-log.
   Expected: the 6×6 square status dot turns red, breathes smoothly (2s ease-in-out, opacity 1 ↔ 0.35) with a soft red glow pulse. No hard step-flicker.
2. Inspect the .ui-status-dot element in DevTools.
   Expected: two child elements — outer <span class="ui-status-dot active"> and inner <span class="glow">. Outer span has a static box-shadow (dark halo, --hud-halo-text chain, NOT in any keyframe). Inner .glow has animation: breathe 2s ease-in-out infinite with opacity as the only changing property.
3. DevTools → Animations panel.
   Expected: only one animation registered (breathe), and its keyframes touch only opacity — no shadow / filter / transform keyframe entries.
4. Stop OBS recording.
   Expected: dot returns to muted grey, .glow animation stops (opacity: 0 by default).

FPS pass — Preview modal resize debounce

Prereqs: dev server running; landing page at /.

1. Open http://localhost:5173/, find the CAM-LOG overlay card, click "Preview".
   Expected: modal opens, iframe fits inside stage with no sub-pixel overflow (the Session 9 getBoundingClientRect() fix is still in place).
2. Slowly drag the browser window edge to resize.
   Expected: the iframe rescales smoothly but NOT on every frame — applyScale fires only ~100 ms after you stop moving. During the drag, the scale is stale for up to 100 ms; after drag end, it snaps to the correct value.
3. Inspect src/views/components/modals/preview.vue.
   Expected: handleResize wrapper uses setTimeout(applyScale, RESIZE_DEBOUNCE_MS) with clearTimeout on re-fire. onUnmounted clears the pending timer.
4. Check the @consume_trigger → @consume-trigger kebab-case rename in <PreviewModal> emit + <Card> handler binding.
   Expected: modal open + close flow still works (triggers emit reaches Card correctly). No console warnings about unknown emit names.

Regression check — Session 9 behaviors still intact

Prereqs: dev server running.

1. Session-date format.
   Expected: reads COL ∇ <DD>.<MM>.<YYYY> // <DDD> (Session 9 was UTC ∇ ...; now parameterized via brand.region). Still one-shot computed at setup.
2. Preview modal iframe sub-pixel flush.
   Expected: no ~1px right-edge overflow (the Session 9 getBoundingClientRect().width fix).
3. Status dot "breathes" when recording.
   Expected: still breathes — but now via the layered composition (Session 10 refinement of the Session 9 behavior).

Documentation

VIDEO — OBS FPS before vs after with live webcam overlay

Side-by-side recording of the cam-log HUD composited over a live webcam feed in OBS on a low-core-processor laptop. BEFORE: HUD with cyberpunk-glow applied to every gold text, fps drops visibly under webcam load. AFTER: same HUD with opt-in halo tokens, GPU-composited audio meter, singleton composables, CSS containment — fps holds at 60.

SCREENSHOT — Cam-log HUD with brand.region-driven session-date

Top-left of the HUD now reads KYO-LABS (secondary) above COL ∇ 23.04.2026 // WED (primary gold). Top-right shows [SESSION] name::T00 + CAM ONLINE. Four .hud-group elements replace the old ad-hoc absolute-positioned classes.

DIAGRAM — Halo / glow token architecture

:root declares --hud-halo / --hud-halo-text / --hud-glow / --hud-glow-color / --hud-group-gap. Consumers opt in per element: <HudFrame> roots with filter: var(--hud-halo); .hud-text--primary composes text-shadow: var(--hud-halo-text), var(--hud-glow); <UiStatusDot>.glow scopes --hud-glow-color: var(--clr-error-100) to re-point the chain to red. Never auto-applied via utility class.

DIAGRAM — AudioMeter hot path (direct DOM write bypassing Vue reactivity)

InputVolumeMeters event at ~50 Hz → singleton useAudioAnalyzer mutates preallocated Float32Array(16) levels in place + increments tick.value++ → <AudioMeter> watches tick, reads levels[i] sync, assigns el.style.transform = SCALE_STRINGS[idx] via template ref. No :style binding, no per-frame allocation, no rAF loop, no reactive array writes.

[github-actions]

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• CHANGELOG.org was modified
• README.org was modified

Release-tracking files. Expected on release PRs; flag on non-release PRs.

[Kyonax]

Superseded by #6, which now targets master directly.

The brand refinement and OBS FPS performance pass (feat-brand_kot, tip 444030b) is an ancestor of context-screen, so it ships inside #6 as part of the v0.5 release PR. No commits are lost and the feat-brand_kot branch is left untouched.

Closing to keep a single open PR for the v0.5 release.