fix(confidence-engine): show focused investigation activity

docs/current-handoff.md

@@ -1946,3 +1946,28 @@ Target node: `n58lwnx`
 - do not create a fresh scenario unless an experiment explicitly requires one;
 - if this investigation is absent, report TEST-STATE MISSING rather than diagnosing persistence failure;
 - structural/relative assertions only for LLM output — no exact prose dependency.
+
+## v0.49.6 — OPEN QUESTION ACTIVITY VISIBILITY — VERIFIED
+
+- **Status:** CLOSED / CHECKPOINTED
+- `INVESTIGATING` is an activity/history cue independent from epistemic `Unclear`
+- overview presentation is compact and non-expandable: `INVESTIGATING · N learned contribution(s)`
+- cue lives inside the originating Open Question card
+- activity derives from canonical focused Contributions using: `targetNodeId OR originatingTargetNodeId`
+- investigated card was live verified after return from workspace
+- untouched question remained without activity cue
+- cue survived cold reload
+- Open Question card remains the route into detailed investigation history
+- zero LLM calls during verification
+- targeted tests: 89 PASS
+- build: PASS
+
+### Unresolved boundaries (no diagnosis)
+
+- completed-turn vs active-turn reconstruction
+- empty response textarea against an already-completed historical question
+- `Back to open questions` lifecycle
+- top-right `Close investigation` wording / likely `Close workspace`
+- `Done for now` remains a separate semantic action
+
+**Next boundary:** FOCUSED WORKSPACE COMPLETED-TURN / ACTIVE-TURN LIFECYCLE