Complete forced Harkonnen returns with private saved inspection

Automatically return the full combined hand when it is the only legal
special-Karama return. Preserve real choices and restore the suspended
response or auction payment through the same settlement. Record the actual
blind draw as owner-only historical card faces, with a bound integrity
receipt; legacy forced saves describe held-card history truthfully.

Add readable private history and enlarged inspectors. Both manual and
forced returns publish only a faction/action completion tag. Wake idle
legacy exchanges through production recovery without writes for real
choices. Keep provisional auction funding rules and release gates.

Validation: types, lint, 5150 offline tests, build and 49 HTTP tests
passed. Independent review resolved history substitution and root review
completed idle recovery wiring. New tests cover 1-4 forced draws, real
choices, overlays, exact saved history, immutable rejection, all four legal
AI paths, production competing actions/recovery, private views and custody.
One genuine Advanced four-player sample completed 158 actions with
4 JSON restores and no rejected action; no difficulty tuning.

Browser QA QUTHVPTT used genuine Advanced setup and conserved Bidding
positions. The actual power returned four cards without a prompt; private
history/enlargement and exact refresh worked. Phone panel fit without
horizontal overflow with 44px inspector controls. Screenshot capture timed
out; complete visual acceptance and transient notice capture remain open.
Preserved every prior row across all ten tables, including 1586
rooms and 3354 seats. New QA/integration records bring totals to
1626 rooms and 3442 seats. No reset, restart or automation.

docs/IMPLEMENTATION_STATUS.md

@@ -1,5 +1,14 @@
 # Dune implementation status
 
+## 21 September 2026 — Harkonnen forced exchange return
+
+Special-Karama exchanges now return automatically when the entire combined hand
+is owed. A private saved inspection retains the actual drawn card faces; legacy
+forced saves describe their held-card observation without inventing draw origin.
+Real choices remain interactive. Shared settlement preserves suspended responses,
+auction recovery and physical custody. See [scope and evidence](HARKONNEN_EXCHANGE.md).
+The existing unfunded-bid ruling and Advanced/publication gates remain open.
+
 ## 21 September 2026 — Completed-action feedback
 
 Core committed movement, shipping, revival, collection and battle results now