feat: enforce no hardcoded colors across entire CMS

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

src/app/(site)/developers/page.tsx

@@ -304,9 +304,9 @@ const GROUPS: Group[] = [
 ];
 
 const METHOD_CLASS: Record<Method, string> = {
-	GET: "bg-green-600/20 text-[var(--color-text)]",
+	GET: "bg-primary/20 text-[var(--color-text)]",
 	POST: "bg-[var(--color-primary)]/18 text-[var(--color-text)]",
-	DELETE: "bg-red-500/22 text-[var(--color-text)]",
+	DELETE: "bg-destructive/22 text-[var(--color-text)]",
 };
 
 function AuthTag({ endpoint }: { endpoint: Endpoint }) {
@@ -332,7 +332,7 @@ function AuthTag({ endpoint }: { endpoint: Endpoint }) {
 	}
 	return (
 		<span
-			className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-green-600/20 text-[var(--color-text)]"
+			className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-primary/20 text-[var(--color-text)]"
 			title="No authentication required"
 		>
 			Public