Implement the five 7 October pending rule rulings

The user answered five recorded questions; each ruling is indexed in
RULE_DECISIONS.md and implemented with a focused regression.

- CHOAM opening income counts as a qualifying collection, so low-population
  Tupile adds its bank increment under the Inflation multiplier. The engine
  guard is removed and the projection/notice expose the added bonus.
- An exhausted Richese cache is legal and restores one ordinary lot; the
  canceled/prevented compulsory cache auction branch restores the reduction
  before the ordinary pool runs and the cache offer is skipped when no cache
  lot can run. The pure continuation quote mirrors the count.
- Suk-rescued casualties count toward Advanced Atreides' seven Kwisatz
  Haderach losses: the battle-loss counter gains the full dialed allocation in
  both rescue paths, and the earlier Suk availability restriction is removed.
- The Guild Nexus Secret Ally reserve return overrides the Arrakis-to-native-
  Homeworld restriction for the holder's own reserves and deposits through the
  shared native-reserve pipeline (generalized from the revival deposit).
- Interior passengers count as entering the territories a relocated Ixian HMS
  points into, so Sandmaster collects there before the native collection.

Full offline suite 7804/7804, types and lint pass. Historical evidence and
superseded test expectations are updated to the ruled behaviour; preserved
combined Homeworld/Nexus, occupation and Richese captures are unblocked but
not re-run here. No existing game, seat or saved state was changed.

docs/IMPLEMENTATION_STATUS.md

@@ -1,5 +1,50 @@
 # Dune implementation status
 
+## 7 October 2026 — five pending user rulings implemented
+
+The user resolved five recorded rule questions; each is indexed in
+`RULE_DECISIONS.md#user-rulings--7-october-2026` and implemented with a focused
+regression:
+
+- **CHOAM low-population opening income.** CHOAM's phase-opening income now
+  counts as a qualifying collection, so a low-population native Homeworld adds
+  its bank increment under the same Inflation multiplier as ordinary charity.
+  The previous `requireRule` guard is removed; the projection and the CHOAM
+  income notice expose the added bonus. `tests/homeworld-charity-engine.test.ts`
+  compares low and non-low Tupile with and without Inflation.
+- **Richese exhausted/canceled cache.** `requireRicheseDeclarationCache` now
+  rejects only a malformed or negative count, and an exhausted cache runs the
+  ordinary pool at its full declared count. A canceled/prevented compulsory
+  cache auction sets `cacheCanceled`, restores one ordinary lot and runs the
+  pool; the cache offer is skipped whenever no cache lot can run, and the pure
+  continuation quote mirrors that. `tests/richese-settlement-preflight.test.ts`
+  asserts the one-lot restoration, and
+  `tests/nexus-richese-betrayal-engine.test.ts` asserts an exhausted-cache
+  Black Market sale now completes.
+- **Suk Graduate / Kwisatz Haderach.** Rescued counters count toward Advanced
+  Atreides' seven battle losses: the battle-loss counter gains the full dialed
+  casualty allocation in both the ordinary and Homeworld rescue paths, and the
+  earlier Suk availability restriction (assignment block, battle preflight and
+  `unavailableSkills` projection) is removed. `tests/suk-graduate.test.ts` and
+  `tests/advanced-native-skills.test.ts` cover assignment and loss counting.
+- **Guild Secret Ally Homeworld reserve return.** The reserve-return grant now
+  overrides the Arrakis-to-native-Homeworld restriction for the holder's own
+  reserves. The return deposits through the shared native-reserve pipeline
+  (`addNativeReserves`/`quoteNativeReserveDeposit`, generalized from the revival
+  deposit), so Homeworld custody stays conserved.
+  `tests/nexus-guild-secret-ally-engine.test.ts` returns a staged Emperor group
+  with Homeworld custody and `tests/nexus-guild-secret-ally-controls.test.ts`
+  updates the route expectation.
+- **Sandmaster / native HMS relocation.** Interior passengers count as entering
+  the territories the stronghold points into, so the Sandmaster skill collects
+  one spice per entered territory with an unambiguous pile before the faction's
+  own traversed-sector collection. `tests/sandmaster-movement.test.ts` compares
+  an identical relocation with and without the assigned skill.
+
+The related union passes; types and lint are green. Preserved combined
+Homeworld/Nexus, occupation-profile and Richese captures are now unblocked but
+have not been re-run here.
+
 ## 7 October 2026 — distinct Mentat replacement and reproducible suites
 
 `replaceMoritaniAssassinationTraitors` now draws the first **distinct** physical