Bind Ixian Nexus replacement to original Richese seller lots

docs/NEXUS_CARD_RULES.md

@@ -1540,7 +1540,7 @@ The private holder offer contains CHOAM's name; it includes the hand count only
 
 Later focused source contracts cover [Emperor strength, purchases and revival](NEXUS_EMPEROR_RULES.md), [Ixian purchased-card replacement](NEXUS_IXIAN_REPLACEMENT_RULES.md), [Fremen worm and revival effects](NEXUS_FREMEN_RULES.md), and [Richese's separate shipment and auction panels](NEXUS_RICHESE_RULES.md). These audits distinguish implemented work from remaining source/timing questions; current runtime evidence is tracked in [implementation status](IMPLEMENTATION_STATUS.md). Bounded Richese auction and Guild shipment Betrayal checkpoints have their own direct local verification below; neither inherits certification of its complete faction, Nexus family or live deployment from earlier evidence.
 
-The [bounded Ixian Secret Ally replacement integration](NEXUS_IXIAN_REPLACEMENT_RULES.md#bounded-local-runtime-contract) connects normal paid/Karama purchases in fresh classic, native Tleilaxu or native Richese profiles in Basic/Advanced. Richese retains exact CHOAM35 plus separate cache; selected catalogue membership does not enable cache/Black Market/special-origin replacement. Successful native BG conversion qualifies after its counter. Harkonnen's provisional order remains replacement, income, cancelable bonus, with no second bonus or eight-card slot. Original settlement/full-hand/same-card semantics remain. Neutral timing/order are product composition, not publisher policy; the adopted core PDF adds no Nexus face or priority ruling. Other modules and full/recovery/deployed acceptance remain open.
+The [bounded Ixian Secret Ally replacement integration](NEXUS_IXIAN_REPLACEMENT_RULES.md#bounded-local-runtime-contract) connects normal purchases in classic/Tleilaxu/Richese profiles, positive Richese cache purchases in Basic/Advanced and genuine Black Market purchases in Advanced. Actual delivered card, native sold lot, original price and eligible recipient remain bound; no normal row, payment or Game is fabricated/replayed. Cache's independent-Nexus scope is visibly provisional and does not alter the printed native Ixian ally exclusion. BG's native counter and Harkonnen's provisional bonus order remain. Unbid keeps/retains supply no purchase. Direct special-Karama sources, other modules, universal priority and full/recovery/deployed acceptance stay separate; the adopted core PDF supplies no Nexus face or new publisher ruling.
 
 **Atreides is the first complete effect family to implement.** It has independent rulebook and physical-face evidence, and the engine already has private plan-element inspection. The Nexus effect needs its own cause and receipt rather than temporarily changing the inspecting faction. The second element must differ from the already inspected element. Preserve the original disclosed value if an allowed later battle edit occurs; follow the existing plan commitment rules instead of refreshing an old observation. The card specifies an element, not the entire hand or battle plan. A weapon/defense request uses actual played-card classification, including the published Reinforcements/Harass exclusions, rather than leaking a card merely because it occupies that slot.