Audit: hardcoded Color.* → MaterialTheme.colorScheme (dark-mode parity)
Replaces ~31 literal Color.White / Color.Red / Color.Gray / Color(0x…)
usages in production screens with theme-aware colorScheme roles. Fixes
dark-mode regressions on those surfaces.
Covers: DocumentCard, DocumentStates, DocumentDetailScreen,
ContractorDetailScreen (delete/favorite tints), AddContractorDialog
(FilterChip, Switch, dialog container).
Overlay-specific Color.Black/Color.White (e.g., photo-grid darkening
overlay) and theme-defined brand tokens (OrganicDesign, ThemeColors)
are left untouched per spec.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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