feat(web): simplify the teacher Evidence Desk

README.md

@@ -5,8 +5,8 @@ Sports Academy. It helps a guide or coach decide **who to see first, why, and wh
 adaptive academic software carries practice and adults carry motivation and intervention.
 
 The portfolio demo is deliberately narrow: sign in, upload one fixed CSV, validate and commit it,
-refresh, inspect the ranked Evidence Desk, open exact evidence, and see the report acknowledged. It is
-not a diagnosis product and makes **no accuracy claim**.
+refresh, inspect the ranked Evidence Desk, review one teacher-friendly evidence list, and see the
+report acknowledged. It is not a diagnosis product and makes **no accuracy claim**.
 
 ## Why this is useful at TSA
 
@@ -141,8 +141,10 @@ walkthrough below; the smoke command does not pretend to replace it.
 3. **0:40–0:55 — Commit and refresh.** Commit the same bytes, then choose **Refresh board now**. The
    deterministic engine publishes one immutable ranked run; no model key is needed.
 4. **0:55–1:30 — Use the Evidence Desk.** Open the top report. Read the cause-specific opener, compare
-   it with the student's own baseline, and expand exact attempts/sessions. Severity determines rank;
-   evidence confidence is shown separately.
+   it with the student's own baseline, and scan the single deduplicated evidence list. Attempt
+   outcomes, selected answers, and timing-aware work/session durations remain readable in seconds
+   without exposing internal record IDs. Severity determines rank; evidence confidence is shown
+   separately.
 5. **1:30–1:45 — Show trust behavior.** Point to “Deterministic fallback · degraded” and the visible
    “Seen” acknowledgment. Refresh/back navigation keeps the report and seen state.
 6. **1:45–2:00 — Show engineering evidence.** Run `npm run eval:portfolio`: eight fixed cases, hard-fail