feat(polls): "See who voted" — per-answer voter list

The poll card showed vote counts but never who voted, even though
computePollState already parses a sender for every response. Surface it:

- tallyResponses now also returns voters: Map<answerId, senderId[]>, built in the
  same latest-response-per-sender loop as the counts, so voters can never disagree
  with the numbers (voters.get(id).length === counts.get(id)). +5 unit tests.
- PollContent adds a "Show who voted" toggle, shown only when results are visible
  (disclosed live, or undisclosed after end — so a secret ballot stays secret).
  When on, each answer lists its voters' display names (getMemberName), rendered
  as a sibling of the answer button so the radiogroup keyboard model is untouched.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
2026-07-10 21:56:50 -04:00
co-authored by Claude Opus 4.8
parent 5cce94edba
commit 1aaea09fc9
4 changed files with 91 additions and 5 deletions
+2 -1
View File
@@ -864,10 +864,11 @@ player.kick).
- **Vote / change / clear** in place — sends stable `m.poll.response` (`m.selections`); latest response per voter wins; clearing removes you from the tally. Multi-choice enforces `max_selections` ("Select up to N").
- **Disclosed vs undisclosed** — undisclosed polls hide counts/percentages/bars (and the vote total) until the poll ends; disclosed polls show live results.
- **See who voted** — a "Show who voted" toggle (shown only when results are visible, i.e. disclosed live or undisclosed-after-end) reveals the voter names under each answer. The voter list rides the same tally as the counts (`voters: Map<answerId, senderId[]>` populated in `tallyResponses`'s latest-response-per-sender loop), so it can never disagree with the numbers; a re-vote moves the voter, and a cleared vote drops them. Names via `getMemberName`; undisclosed polls stay secret until close.
- **End a poll** — the poll's creator or a moderator (redact power) can end it via an inline confirm; sends stable `m.poll.end`. Ended polls lock voting, show "Poll closed · Final results", reveal results, and highlight the winner(s) (ties supported). Only responses cast on/before the end event count.
- **Cross-client** — reads **both** the stable (`m.poll`/`m.id`/`m.selections`) and unstable (`org.matrix.msc3381.poll.*`) wire formats by hand (matrix-js-sdk 41.7.0's poll parsers only speak unstable), and uses the SDK `Poll` model for end-event validation (creator / redact-PL) + before-end response filtering. Polls authored in Element render/vote/end correctly and vice-versa.
- **Accessibility** — `radiogroup`/`radio` (single, with arrow-key roving) or `group`/`checkbox` (multi) semantics, `aria-checked`/`aria-disabled`, winner announced to AT.
- Pure tally/visibility/winner + wire-format parsing live in `utils/poll.ts` (+ `poll.test.ts`, 14 tests incl. the stable/unstable round-trip).
- Pure tally/visibility/winner/voters + wire-format parsing live in `utils/poll.ts` (+ `poll.test.ts`, 18 tests incl. the stable/unstable round-trip and voter attribution).
### Voice Message Playback (waveform + speed)