feat: preserve native Face Dance through Semuta battle discards

docs/SEMUTA_SOURCE_UPDATE_20260907.md

@@ -237,8 +237,8 @@ policy**, not a newly discovered publisher timing rule. Full-hand
 Semuta uses the explicit user-approved atomic exchange; its completed
 hand count is unchanged. Pending gifts, competing responses,
 completed Ornithopter arrivals with Ecaz Ambassador or Moritani Terror,
-pending battle rewards other than native Harkonnen capture and other typed
-producers retain their automatic continuation; Semuta cannot claim those events
+pending battle rewards other than native Harkonnen capture/Face Dance and other
+typed producers retain automatic continuation; Semuta cannot claim those events
 yet.
 The completed Box's selected
 search card stays private and its paid shuffle is not repeated
@@ -248,6 +248,36 @@ separate [reaction privacy audit](SEMUTA_PRIVACY_REVIEW.md) explains why
 auto-closing only when nobody secretly holds the card would leak
 possession. The main game and public expansion gates remain closed.
 
+**11 October 2026 — native Face Dance suffix.** Mandatory and winner
+battle discard batches now offer Semuta with native Tleilaxu Face Dance pending.
+Only that reward exclusion changed. The existing battle receipt already binds
+the pending native owner, original winner and territory. Claim/pass preserves
+casualties and winner-card cleanup before the same private opportunity; it
+cannot replace an army early, repeat replacement or move the claimed card back.
+Auditor, tech, CHOAM income and other reward exclusions remain separate.
+
+The permanent regression fails before and passes after, covering both discard
+producers, claim/pass, one replacement, original leader death, force and card
+custody, and retired reaction/Face Dance replay rejection. Genuine mixed
+CHOAM/Ix setup supplies the physical cards; a conserved traitor/Face Dancer
+identity swap stages the matching winner without inventing a second card.
+
+Twenty-four isolated runtime scenarios cover both producers, Basic/Advanced,
+claim/pass and four legal Semuta AI profiles, then one native replacement.
+Eight further native Face Dance AI cases cover all four profiles in both modes:
+each uses its own matching card and legally replaces three survivors. The old
+winner ends with reserves18/Tanks2 and no board group; Tleilaxu has board3,
+reserves12/Tanks5, and the winning leader has one death.
+
+Real GameTable at 390px claims the winner's Hunter Seeker before restoring
+Tleilaxu's actual reserves/sector selector. Reveal Face Dancer replaces three
+in Arrakeen10 and keeps Hunter Seeker in Richese's hand. Phase7's original Ix
+opening remains; no premature collection settlement is claimed. No horizontal
+overflow. Temporary scripts/server/browser are removed or stopped; no saved
+store or deployed game was targeted. This is bounded continuation coverage,
+not complete Semuta/Tleilaxu or deployed acceptance.
+Types/lint and 117 affected unit cases across eight files pass.
+
 **11 October 2026 — original final-Mentat continuation.** Gamont disposal
 inside CHOAM's final opportunity now offers Semuta too. The receipt signs an
 optional `mentat` marker and the still-pending native opportunity. Claim or