fix: resolve lint errors from ACL/admin implementation

- Remove unused requireOwnerOrAdmin import from videos.ts
- Remove unused requireAuth import from users.ts
- Remove unused GraphQLError import from articles.ts
- Replace URLSearchParams with SvelteURLSearchParams in admin users page
- Apply prettier formatting to all changed files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/backend/src/graphql/resolvers/users.ts

@@ -3,7 +3,7 @@ import { builder } from "../builder";
 import { CurrentUserType, UserType, AdminUserListType } from "../types/index";
 import { users } from "../../db/schema/index";
 import { eq, ilike, or, count, and } from "drizzle-orm";
-import { requireAuth, requireRole } from "../../lib/acl";
+import { requireRole } from "../../lib/acl";
 
 builder.queryField("me", (t) =>
   t.field({