style: apply prettier across fork files

check:prettier was not part of my gate routine, so formatting drift accumulated
across the session's touched files (and a few older ones). Run prettier --write
to bring the repo back to 'All matched files use Prettier code style!'.
Formatting only — no logic changes. tsc/tests/build all green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/utils/poll.ts

@@ -77,7 +77,7 @@ export function parseResponseAnswerIds(content: Record<string, any>): string[] {
 export function validateSelections(
   rawIds: string[],
   validIds: Set<string>,
-  maxSelections: number
+  maxSelections: number,
 ): string[] {
   const out: string[] = [];
   const seen = new Set<string>();