Grip-sense: bar reads clearly red + glow rework & distinct indicators (#74)

[petegordon]

Fixes #74.

Summary

Started as "make the grip-sense bar activation read clearly red" and, through review feedback, grew into a clear split between the two grip-sense indicators plus a glow rework. The grip-sense glow (on-top marker) and bars (handle strip meshes) are now two independent, separately-toggled indicators.

Grip-sense bars — the #74 fix

The bars now sit at an inert rest grey and ease to the grip color (red) with a fixed emissive lift while that side is gripped, then fade back on release — so the bar itself unmistakably reads activation (the original "white→red was too faint" report).

• Per-side materials are cloned, so left/right light independently.
• Excluded from the body/accent theme groups so they don't vanish into the body color; driven on their own.
• Toggled by Show Grip Sense Bars (setGripBarsVisible).

Grip-sense glow — rework

The glow marker (Bar/cylinder shape) reads as a real glow again instead of a flat painted cylinder:

• A band texture that wraps the full circumference (consistent from any angle) and fills most of the length with soft fades at the ends.
• Normal blending so it stays visible over the light handles (pure additive vanished over near-white — no headroom).
• The Glow Length slider now scales the lit length as expected (max ≈ full handle).
• New per-profile gripMarkerYaw knob angles each glow's bumper/trigger end toward the controller centerline (set to 18° for the Steam Controller) — best seen in the Top view.

Distinct definitions

Glow and bars are now cleanly separated, and the docs/tooltips match the code:

• Glow: _gripEnabled / setGripVisible / overlay:gripViz; Brightness slider = glow peak opacity only.
• Bars: _gripBarsVisible / setGripBarsVisible / overlay:gripBars; lit emissive is a fixed constant, independent of the Brightness slider.
• Shared grip color drives both (one picker) — now documented.
• Refreshed stale "bars are static/cosmetic" comments and the settings tooltips.

Also

• Settings dropdown fix: on Windows the open <select> popup rendered light text on a white background (unreadable). Added color-scheme: dark + explicit option colors.
• Updated from main (includes Steam Controller float layout: spacing fix, defaults & Edit Layout editor (#75) #79).

Testing

• node --check clean on all changed files; core (85) + visualizer (5) tests pass.
• Live checks (Steam Controller): enable Show Grip Sense Bars, grip a handle → that side's bar goes grey→red and fades back (left/right independent). Enable Show Grip Sense Glow, grip → the cylinder glow shows as a soft band; run the Glow Length slider 1→5 (fills the handle at 5); confirm the inward yaw in the Top view. Open a settings dropdown → options readable.

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[github-actions]

🔎 PR #76 preview — test it in isolation

🌐 Web overlay: https://lab.usersfirst.games/pr-preview/pr-76/overlay/
(landing page: https://lab.usersfirst.games/pr-preview/pr-76/)

💻 Desktop installers (prerelease): https://github.com/UsersFirst/tandemonium-controller-lab/releases/tag/pr-76

• Windows — …-Setup.exe (installer) or .zip (portable)
• macOS — WebHID-Controller-Overlay.dmg or .zip (unsigned: right-click → Open)

_{Updated for a64cf23. Web preview and prerelease are torn down when this PR closes.}

[Ivanim13]

Web version has the correct activation color on the grip-sense, but not the installer/portable versions. In addition, a second grip-sense strip appears inside the model. Ideally, the grip-sense strip that's outside of the model should be inside the model, just like the duplicated one.

[petegordon]

Ok. So the Grip Sense Bars (should be the bars that are display to the left and the right of the controller body. The Grip Sense Glow is the is the width and length in side the controller that glows.

The brightness changes the GLob (not the bar)
The bars on the web flash a light color and then change to the dark color--this is not correct for the web interface and the electron app to behave different.
Lastly, the Grip Sense Glows are too close to the center and need to move out from the center of the controller towards the edge and within the controller handles. (left needs to go farther left and right needs to go farther right)
Double check on the use of Grip Sense Glow versus Bar in settings.

[petegordon]

Reworked per the clarified model (bars = cosmetic side strips, glow = the activation indicator):

• Bars no longer flash. Removed the GripSense bar activation isn't noticeable #74 white→color base-color tint (and the brightness-scaled bar emissive) — that's what made the bars flash light→dark and rendered differently on web vs the Electron build. The bars are now fully static, so activation is shown solely by the glow and both targets render identically.
• Brightness affects the glow only (the bar no longer reacts to it). Renamed the setting to "Grip Glow Brightness" and fixed the Bars / Color tooltips so Glow-vs-Bar wording matches behavior.
• Glows moved outward into the handles — gripMarkerSideOffset 0.06 → 0.14, so the left glow goes farther left and the right farther right, sitting where the hands grip instead of bunched near center.

On the "second strip inside the model": that's the two distinct features working as intended — the bar (outside strip) and the glow (inside the handle), now pushed out within the handle. Shout if you'd actually prefer them merged.

Two things to confirm on the refreshed build (https://lab.usersfirst.games/pr-preview/pr-76/overlay/ + the rebuilt pr-76 installer):

1. Web and the installer now show the same activation — removing the per-frame bar color change was the most likely cause of the web/desktop difference, but please verify on the new installer since I can't run the desktop build here.
2. The 0.14 outward offset is a first pass — if the glows want to go a touch more or less, it's a one-number tweak.

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