Added scripts/check-admin-colors.mjs — scans all src/ files for: - text-white, text-black (use theme text vars) - bg-white, bg-black (use theme background/overlay vars) - bg/text/border/ring with gray/slate/zinc/stone palette - bg/text/border/ring with red/green/blue/etc palette Fixed 21 violations across 11 files: - Overlays: bg-black/* → bg-foreground/* - Text: text-white → text-primary-foreground - Backgrounds: bg-white/10 → bg-background/10 - Green accents: bg-green-* → bg-primary - Red accents: bg-red-* → bg-destructive Integrated into: - lint-staged: runs on every *.ts/*.tsx commit - vitest: src/lib/no-hardcoded-colors.test.ts replaces old audit test - Allowlist: shadcn/ui primitives (button, badge, dialog) + 4 graphical files
