Connect Spice Banker sealed battle spending and saved settlement

Prototype one through three own spice as a separate sealed battle commitment. Reserve funds alongside actual force support, add strength only for the surviving skilled leader, and settle once through existing versioned writes. Apply the documented card/core-rule interpretation: payment survives leader death or loss, except for the sole successful traitor caller. Keep printed disc strength and bounty unchanged. Normal income awaits its deferred-custody ruling; combined modules remain gated.

Validation: 54 focused tests; typecheck, lint, 4490 offline tests, production build and 43 HTTP tests passed. Independent rules, privacy, persistence and UI review completed. SQLite tests cover reserved-spice diversion, concurrent settlement, traitor waiver and legacy plans. Browser exercised a three-spice commitment, pending refresh, actual +3 strength and payment, and restored private cards and the next decision. Two genuine four-profile Basic/Advanced samples completed without rejected candidates but did not use Banker spending.

Following another reported outage, the server remained healthy. Preserved all 461 opening rooms and original seat/recovery rows (495 rooms after QA/HTTP). SQLite integrity and foreign keys passed. A fresh online backup captured all 495 rooms, and browser refresh restored the QA seat. No restart or reset was needed.

Verified source tree: 208bf9324ab994b5e59ed50d78998b4dbf8810b3b6799b1a577ef3b84479335f

docs/IMPLEMENTATION_STATUS.md

@@ -1,5 +1,27 @@
 # Dune implementation status
 
+## 13 September 2026 — Spice Banker battle commitment prototype
+
+[Spice Banker](SPICE_BANKER_RUNTIME.md) connects one through three sealed own
+spice to a selected skilled leader's surviving battle strength. Funds remain
+separate from force support and unavailable for other spending. A sole successful
+traitor caller keeps the commitment; other outcomes pay the Bank even on leader
+death, while death removes the bonus. Printed disc values and bounties stay fixed.
+
+Owner/full-plan inspection and public reveal display the amount at their proper
+times; all four AI profiles submit funded choices. Independent source and
+persistence review, private SQLite restart, rejected diversion, concurrent final
+resolution and legacy omitted-field continuation cover this boundary. Two seeded
+Basic/Advanced samples finished without rejected candidates but did not use
+Banker spending; targeted tests establish the effect. The browser checked a
+three-spice commitment, pending refresh, actual +3 strength and payment, then
+restored one board force, fifteen reserves, four Tanks, two spice and the same
+private cards. Broad results and final preservation are in the checkpoint commit.
+
+Normal income remains pending a user ruling about already-earned public spice
+when the trainer dies or is captured before Mentat Pause. Combined modules and
+complete skill acceptance remain unfinished; no mode/publication gate is opened.
+
 ## 13 September 2026 — Smuggler reserve shipment prototype
 
 [Smuggler shipping](SMUGGLER_SHIPMENT.md) connects one optional free accompanying