Twelve small fixes across the web library and desktop app

[hemangjoshi37a]

This PR bundles twelve small, independent fixes.

Each commit is scoped to a single issue, adds a CHANGELOG.md entry, and is self-contained. Resolving them via one PR rather than twelve simplifies review; the maintainer can cherry-pick any subset.

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Fixes #104 — Allow Ctrl+= to zoom in without Shift

Electron's built-in zoomIn role uses CmdOrCtrl+Plus, which on US QWERTY requires Shift+=. In desktop-app/src/electron-main/menus.js:

{ role: 'zoomIn', accelerator: 'CmdOrCtrl+=' },
{ role: 'zoomIn', accelerator: 'CmdOrCtrl+Plus', visible: false },

Fixes #56 — Reflect actual tracking state in Start/Stop button label

With Start enabled on, the button showed "Stop" before the camera connected; clicking it inverted the user's intent. updateStartStopButton now reads !paused && useCameraButton.hidden; a new requestToggleTracking helper is shared by the button onclick and web F9 — requests camera when not connected and guarantees paused === false. Also lets F9 prompt for camera in the web version.

Fixes #42 — Don't flash a full-screen red outline on non-occlusion dwell cancellations

showOccluderIndicator(occluder || document.body) painted a screen-wide red dashed outline whenever a dwell was canceled for non-occlusion reasons. Guarded to fire only for a real element other than document.body.

Fixes #80 — Hide optical flow tracking points at 100% Tilt influence

At 100% Tilt influence the optical flow points are weighted to zero. Guarded ctx.fillStyle = "lime"; pointTracker.draw(ctx) with if (s.headTrackingTiltInfluence < 1), matching the === 1 disable condition on the sensitivity sliders.

Fixes #41 — Wait for head detection before starting dwells

Module-private headTrackingInitialized (set in TrackyMouse.init) and headDetected (latched true the first frame pointTracker.pointCount > 0). Dwell creation gated on !headTrackingInitialized || headDetected. Pure dwell-clicker consumers (never call init()) unaffected.

Fixes #32 — Edge-overshoot margin at screen edges

Tracked mouseX/mouseY now clamp to [-50, screenWidth+50] / [-50, screenHeight+50]; a separate visibleX/visibleY clamps to screen bounds for the actual outputs. Up to 50 px of overshoot absorbed.

Fixes #47 — Re-apply skipTaskbar to survive Explorer restart

Windows-only 5-second interval that calls screenOverlayWindow.setSkipTaskbar(true). Cleared on window closed; guards with isDestroyed().

Fixes #84 — Re-check for updates periodically while the app is running

Refactored single-shot check into performCheck with a checkInProgress guard. Public checkForUpdates now starts a setInterval(performCheck, 6 * 60 * 60 * 1000). No new user-facing setting.

Fixes #70 — Suppress facial-gesture clicks when facemesh confidence is low

Early-return in the facemesh gesture-to-click path when !facemeshPrediction || facemeshPrediction.faceInViewConfidence < faceInViewConfidenceThreshold (reusing the existing 0.7 constant). Already-held buttons stay held. Note: there's a hardcoded facemeshPrediction.faceInViewConfidence = 0.9999 with a TODO upstream, so this gate is effectively inert until real confidence flows through.

Fixes #115 — Button to reset each setting to its default

Small circular-arrow reset button beside every setting with a declared default. Clicking it calls setControlValue(setting.default) and dispatches a change event so the existing save/propagate pipeline runs. Covers slider, checkbox, and dropdown. Styled in core/tracky-mouse.css; accessible label in core/locales/en/translation.json under ui.resetSetting.label.

Fixes #55 — Deactivate camera after 5 minutes of inactivity

Hooked into updatePaused. Schedule a timer when paused goes true; cancel when it goes false; on fire, stop the MediaStream tracks, null cameraVideo.srcObject, show useCameraButton, reset Start/Stop label. Reactivation uses the same requestToggleTracking → useCamera path as the Start button. Demo-footage mode is skipped via instanceof MediaStream.

Fixes #95 — Raise sensitivity and acceleration slider maxima

Doubled the max (100 → 200) on Horizontal sensitivity, Vertical sensitivity, and Acceleration. Conversion divisors unchanged, so previously-stored setting values are still valid — they now sit at the middle of the new range. The reset-to-default button from #115 is a safety net if someone overshoots.

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Changelog

All twelve fixes have entries under ## [Unreleased] in CHANGELOG.md, split across ### Added (#115), ### Changed (#80, #84, #55, #95), and ### Fixed (the rest), per Keep a Changelog ordering.

Test plan

Fix #104 (desktop)

• Ctrl+= zooms in; Ctrl+Shift+= still zooms in; View > Zoom In appears once, labeled Ctrl+=.

Fix #56 (web)

• Cleared settings, Start enabled on, reload without camera — button reads "Start".
• F9 without camera granted — prompts for camera; tracking begins.

Fix #42 (dwell clicker)

• Dwell → toggle off, move off page, retarget-to-null — no red outline. Genuine occlusion still flashes.

Fix #80 (web)

• Tilt influence 100% hides lime dots; 99% shows them.

Fix #41 (web)

• init() + initDwellClicking(): physical mouse before camera grant — no dwells. Brief face drop-outs don't disable. Pure initDwellClicking unaffected.

Fix #32 (head tracking)

• At each edge, small backward head jitter is absorbed. onPointerMove(x, y) never reports out-of-bounds coords.

Fix #47 (Windows)

• Restart Explorer from Task Manager — overlay window does not appear in taskbar. No lingering interval after app close.

Fix #84 (desktop)

• Startup check runs. 6 hours later, re-check fires. (Shorten RECHECK_INTERVAL_MS to verify.) No dialog stacking.

Fix #70 (desktop, wink/open-mouth)

• Once real facemesh confidence is plumbed, standing up with wink-to-click mode — no spurious click. Brief low-confidence frames during a drag don't release the held button.

Fix #115 (web/desktop)

• Reset button appears beside every applicable setting. Click reset on slider/checkbox/dropdown returns to default; no button on group headers or action buttons.

Fix #55 (web/desktop)

• Pause tracking; 5 minutes later webcam light turns off. Click Start / press F9 — camera reconnects. Unpausing within 5 minutes keeps camera connected. Demo footage mode not torn down.

Fix #95 (web/desktop)

• Horizontal/Vertical sensitivity sliders go up to the new max (visibly further to the right). Acceleration slider same. Existing persisted settings open at mid-range, not at max. Cursor feel at slider positions below the old max is unchanged.