Implement Moritani Nexus placement and preserve later Terror custody

tests/nexus-moritani-bots.test.ts

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+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { applyAction, viewGame } from '../game/engine';
+import { botActions } from '../game/bots';
+import { nexusMoritaniBotActions } from '../game/nexus-moritani-options';
+import {
+  nexusMoritaniFixture,
+  nexusMoritaniInventory,
+} from './fixture-nexus-moritani';
+
+void test('all four Moritani profiles use Cunning for a public opposing Arrakis group and keep token custody until allowance', () => {
+  for (const profile of ['Easy', 'Medium', 'Hard', 'Brutal'] as const) {
+    const f = nexusMoritaniFixture();
+    // Conserved public target position, staged before the real declaration.
+    const target = f.g.players.find((player) => player.id === f.target)!;
+    target.reserves -= 3;
+    target.forces['red_chasm:7'] = 3;
+    const v = viewGame(f.g, f.owner);
+    v.players.find((player) => player.id === f.owner)!.bot = profile;
+    const before = structuredClone(v);
+    const action = botActions(v)[0];
+    assert.deepEqual([action], nexusMoritaniBotActions(v));
+    assert.equal(action.territory, 'red_chasm');
+    assert.equal(action.nexus, v.nexusMoritani!.event);
+    const pending = applyAction(f.g, f.owner, action);
+    assert.equal(pending.response?.kind, 'moritaniPlacement');
+    assert.deepEqual(pending.moritaniTerror, f.g.moritaniTerror);
+    nexusMoritaniInventory(pending);
+    assert.deepEqual(v, before);
+  }
+});
+
+void test('Cunning policy reads only public opposing armies, supports an existing stack and retains ordinary fallback', () => {
+  const f = nexusMoritaniFixture({ stack: true });
+  const target = f.g.players.find((player) => player.id === f.target)!;
+  target.reserves -= 2;
+  target.forces['arrakeen:10'] = 2;
+  const v = viewGame(f.g, f.owner);
+  for (const p of v.players.filter((player) => player.id !== f.owner))
+    for (const key of ['hand', 'traitors', 'spice'])
+      Object.defineProperty(p, key, {
+        get() {
+          throw new Error('Private opponent data read');
+        },
+      });
+  assert.equal(nexusMoritaniBotActions(v)[0].territory, 'arrakeen');
+  v.nexusMoritani!.blocked = 'Not available now';
+  assert.deepEqual(nexusMoritaniBotActions(v), []);
+  const ordinary = viewGame(f.g, f.owner);
+  ordinary.nexusMoritani = null;
+  for (const profile of ['Easy', 'Medium', 'Hard', 'Brutal'] as const) {
+    ordinary.players.find((player) => player.id === f.owner)!.bot = profile;
+    const action = botActions(ordinary)[0];
+    assert.equal(action.type, 'decision');
+    assert.equal(action.nexus, undefined);
+    nexusMoritaniInventory(applyAction(f.g, f.owner, action));
+  }
+});