android: derive full Material3 color scheme from theme tokens - #312
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LitterAppTheme only mapped 11 of 36 Material3 color roles, so Material3 components (sheets, dialogs, text fields, chips, cards) fell back to the baseline M3 surface palette. Add a build-time generator using the official material-color-utilities (Material Theme Builder engine) to derive every M3 role from the resolved Litter theme tokens, emit LitterMaterialSchemes.generated.kt, and consume it in LitterAppTheme. Adds a Makefile material-schemes stamp wired into android-debug and android-release, CI generation in shared-prep, and Node 24 setup.
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Purpose
Fixes #311. Android's Material3 components were rendering with the default Material Design 3 surface palette because
LitterAppThemeonly mapped 11 of 36 M3 color roles. This PR derives the full 36-roleColorSchemefrom the existing Litter theme tokens using Google's official material-color-utilities (the engine behind the Material Theme Builder) as a build-time generator.Key changes
tools/scripts/generate-material-schemes.mjs— reads the same theme JSONs iOS bundles, resolves each to the existing Litter tokens (mirrorsLitterResolvedTheme.resolve/ iOSResolvedTheme.init, including the 8-digit#RRGGBBAA→ solid fix), seeds aDynamicSchemefrom those tokens, derives all 36 M3 roles viaMaterialDynamicColors, and emitsLitterMaterialSchemes.generated.kt.tools/scripts/register-esm.mjs/esm-resolver.mjs— loader hook so Node 24 can consume@material/material-color-utilities@0.4.0's extensionless ESM imports (stays on the latest version).LitterTheme.kt—LitterAppThemebuilds a complete 36-roleColorSchemefrom the generated roles, with fallback to the old 11-role mapping if a slug isn't found.material-schemesstamp target wired intoandroid-debugandandroid-release.mobile-ci.yml,android-apk-release.yml,android-play-release.yml: Node 24 + generator run in shared-prep, generated file shipped in thegenerated-mobile-sourcesartifact..gitignore—*.generated.ktso the build output stays local.Verification
LitterMaterialSchemes.generated.kt(85 × 36 roles).darkColorScheme/lightColorScheme.primary=#458588(its 8-digit#45858880resolves to the intended solid color, matching iOS); studio-lightbackground=#FFFFFF../gradlew :app:compileDebugKotlin— BUILD SUCCESSFUL../gradlew :app:testDebugUnitTest— BUILD SUCCESSFUL (all existing tests pass).assembleDebugproduces a launchable APK (native libs, Alpine fs, theme assets); installed and launched on an emulator.No iOS code or build path is changed (verified: no changes under
apps/ios/or anyios-*Makefile target).