docs: record player review mode from the finished-exam screenshot

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TqXevQJhxFrM7jJg82cgZN

docs/TODO.md

@@ -533,6 +533,22 @@ The reference is UWorld-style for the exam player and AMBOSS for analysis.
 - [ ] **The rail shows numbers while sitting an exam and shortened stems in
       review.** It is numbers in both today.
 
+### Player review mode — specified 12 Sep from a finished exam
+Reviewing a block that has ended looks like study mode, **whether or not
+anything was answered**. The screenshot is an exam that ran out of time with
+0/2 answered, and it shows: the REVIEW badge, the rail with shortened stems,
+the correct option marked green with its explanation open beneath it, every
+other option struck red with the peer percentage beside it, KEY INFO /
+ATTENDING TIP / LABS, SHOW ALL EXPLANATIONS and HIDE STATS along the foot, and
+PREVIOUS / SKIP to move between them.
+
+- [ ] **"Finished" means the attempt is closed, not that every question was
+      answered.** The flag in QuizPage is `answeredCount >= totalCount`, which
+      is wrong for exactly this case: a block that timed out with nothing
+      answered is over, and it still shows numbers and hides explanations.
+- [ ] **The player opens a completed attempt in review** rather than sending
+      people to `/results/:id`, which makes that page redundant.
+
 ### Analysis
 - [ ] **Session Analysis is the third tab**, inside the Analysis page with the
       session rail beside it — not a link away. Four figures, the donut, and