Implement Harkonnen Nexus exchanges with durable traitor declarations

docs/IMPLEMENTATION_STATUS.md

@@ -1,5 +1,7 @@
 # Dune implementation status
 
+**Harkonnen Nexus exchange checkpoint, 10 September 2026:** [NEXUS_HARKONNEN_RUNTIME.md](NEXUS_HARKONNEN_RUNTIME.md) records draw-first Cunning and absent-faction Secret Ally, exact private returns, protected revealed Face Dancers, saved suspended actions and durable prior traitor declarations. Shared controls and all four bot profiles use projected identities. Independent review fixed lost preceding decisions and the paid Nullentropy action gate. **Types, lint, all 3,885 offline cases, production build and 40 HTTP/session cases pass.** Forty-six new cases cover rules, consumers, continuations and concurrent SQLite recovery. Two three-seat browser rooms passed draw/return, private restoration and desktop/phone inspection. All **3,295** preexisting room versions/hashes remain unchanged. Betrayal remains blocked pending the existing private response timing decision; complete Nexus and expansion games remain unfinished, and no release gate opens. The server was reused, no restart was due, and automation remains removed.
+
 **Atreides Nexus inspection checkpoint, 10 September 2026:** [NEXUS_ATREIDES_RUNTIME.md](NEXUS_ATREIDES_RUNTIME.md) records Cunning's distinct second commitment and absent-faction Secret Ally, physical card disposal, No-Field distinctions, private history, all four editor locks and bot handling. Independent review fixed lost-response bypass, first-answer drift and a sealed plan contradicting its signed observation; legitimate Residual reanswers preserve the first historical disclosure. **Types, lint, all 3,839 offline tests, production build and 40 HTTP/session tests pass.** Forty-four new cases include concurrent SQLite recovery and four independent corruption regressions. Three-seat keyboard play, answer, protected plan submission and desktop/phone refresh passed. All **3,234** preexisting room versions/hashes survived the scheduled backup/restart and final comparison. Betrayal response timing, Residual after two answered Cunning fields, other card families and complete module games remain explicitly unfinished; no release gate opened. Automation stays removed; verified checkpoints are authorized for push without another confirmation.
 
 **Nexus ownership and complete component reference checkpoint, 10 September 2026:** [NEXUS_CARD_RUNTIME.md](NEXUS_CARD_RUNTIME.md) records the twelve-card physical deck, whole-phase Basic/Advanced draw opportunity, private replacement policy, all three alliance-forfeiture paths and complete inspectable 36-panel reference. Review fixed real Storm-entry initialization, edited progress/replay acceptance, one-way alliances and the private redraw prompt's public timing leak. Pre-draw preferences resolve without extra confirmations. **Types, lint, all 3,795 offline tests, production build and 40 HTTP/session tests pass.** Three-seat keyboard draw/redraw/refresh and all twelve normal/enlarged desktop/phone cards passed; independent review inspected 48 renders. All **3,173** preexisting room versions/hashes remain unchanged. All individual Nexus effects, Discoveries and complete expansion games remain unfinished; no release gate opened. Existing server reused, no restart due, no automation recreated.