chore(lint): remove dead eslint-disable directives

The project lints with Biome only, so none of these 78 directives across 57
files ever suppressed anything. Directives that carried the rationale for a
flagged dynamic index access keep that rationale as a plain comment.

src/app/admin/theme/page.tsx

@@ -493,7 +493,7 @@ export default async function AdminTheme({
 												width: 20,
 												height: 20,
 												borderRadius: 4,
-												// eslint-disable-next-line security/detect-object-injection -- k from fixed theme color key list
+												// k from fixed theme color key list
 												background: theme.settings[k] ?? "#64748b",
 												boxShadow: "inset 0 0 0 1px rgba(0,0,0,0.2)",
 											}}