adaptive_liquid_glass 0.1.0-dev.3

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• GlassTabBar and GlassTabBarItem: iOS 26's floating tab bar. The selected tab sits on a pill; pressing turns it into a clear glass lens that overhangs the bar and magnifies the tabs under it, dragging slides it between tabs, and letting go springs it to the nearest tab (sizes and timing measured from iOS 26.4). Works in every render mode, follows the reading direction and Reduce Motion, and exposes each tab as a selectable button to assistive tech.

Task 17d — noise floor, tone LUT, hard target met #

• Certified fidelity: 46/75 scenes pass (SSIM ≥ 0.97, ΔE ≤ 2.0), median SSIM 0.9828 / ΔE 1.09, min SSIM 0.9532, 0 scenes below 0.95 (75 in-set; held-out 48-scene set 18/48, min 0.9470).
• Tone LUT: piecewise-linear 9-knot input→output curve per variant set, measured from grey flats (covers below the 0.15 code floor); small dark shapes gain a toneLift.
• Clear glass: lens max-min grid (lensSizeRef/lensStrength), rim mix, post-blur share; regular dark: anisotropic frost (blurAspectPower).
• Noise floors: SwiftUI-vs-SwiftUI repeat floor is exactly zero (bit-deterministic simulator); SwiftUI-vs-UIKit cross-API floor committed; compare.py --floor adds report-only within-noise verdicts.

• Native glass is SwiftUI's own: native mode hosts a GlassEffectContainer with a .glassEffect view per member (was UIKit UIGlassEffect), so it matches SwiftUI pixel for pixel, follows MediaQuery.platformBrightness like the shader path (and re-themes when it changes at runtime), draws circles as circles and supports unionId.

• Breaking: native glass is the default on iOS 26+; auto picks it from the first frame (the iOS version is read synchronously at startup). LiquidGlassThemeData.nativeEnabled is removed; use mode: or defaultMode: GlassRenderMode.shader to opt out.

• Widget.glassEffect(glass:, shape:, glassId:, unionId:, padding:): one-line glass, mirroring SwiftUI's .glassEffect(_:in:).

• LiquidGlass.padding: insets the child inside the glass (directional).

• LiquidGlass.adaptiveForeground (default true): text and icons on glass take a readable label colour (the Material on-colour on Android); explicit colours still win.

• LiquidGlass.onPressed: glass as a button, with button semantics, focus, Enter/Space activation and interactive glass unless the glass opts out with interactive(false).

• Glass remembers an explicit interactive(false), so it no longer equals the plain preset.

• LiquidGlass.precache() is optional: shader glass draws as a blur until the shader loads, then switches in place.

• Android and the other non-shader paths no longer load the shader.

• concentricRadius is no longer exported.

• Android is declared as a supported platform (a Dart-only plugin entry).

• Breaking: GlassMotionConstants.pressScale is replaced by pressGrowthArea and pressScaleMax: a pressed shape grows by about the same area whatever its size (sqrt(1 + pressGrowthArea / (w·h)), capped), as SwiftUI does, so small shapes grow more than large ones.

• Press-in and release use separate springs (releaseResponse, releaseDamping); press, release and morph springs, press stretch and glow radius are refitted to lossless SwiftUI recordings.

• Shader fidelity: every reference scene is at SSIM ≥ 0.95 against SwiftUI (minimum 0.9532, median 0.983, median ΔE 1.09), with a per-variant tone curve, anisotropic frost, a wide frost tail and a refitted clear lens.

• Example: an Android host, a dark theme for the gallery, and motion-scene harness entries (-motion, -dump); harness entries default to the shader unless -mode native is passed.

• First development release: LiquidGlass, GlassGroup, Glass, GlassShape, LiquidGlassTheme, GlassBackdropSource and GlassForeground; shader glass fitted to SwiftUI on iOS, Apple's native glass on iOS 26+ (opt-in), Material 3 on Android.