perf: cut biome lint from 25s to 1s and fix pre-existing lint failures

Exclude generated drizzle-kit snapshot artifacts from formatting checks (drizzle/drafts/meta), which made biome scan a 360KB generated JSON for 23s. Fix the pre-existing lint errors in error-monitor, article-form and the admin-search-permissions mock so pnpm biome:lint is green in CI.

src/components/admin/article-form.tsx

@@ -14,7 +14,7 @@ export function ArticleForm({
 	action,
 	defaultValues,
 }: {
-	action: (formData: FormData) => Promise<ArticleSaveResult | void>;
+	action: (formData: FormData) => Promise<ArticleSaveResult | undefined>;
 	edit?: boolean;
 	defaultValues?: {
 		title?: string;