Dr. Jackson stocks mining hardware

Uses the game's inventor stock hook (his shop at night and his weekly visit
to the player's store) and his own table placement, so prices are item value
plus his markup. A rig if the player has none (30% otherwise), two basic
cards every time, advanced cards from day 10 (60%, a second at 30%),
flagships from day 30 (25%) or always during his special stock from day 20.
New, genuine cards only; only after Mining Access is unlocked. A test entry
in the dev panel (F9) restocks the counter the way his shop does.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/Decentralized.Domain.Tests/Program.cs

@@ -290,6 +290,28 @@ internal static class Program
             Check(Near(dr.Received, 900 * (1 - Tuning.ExchangeFee), 1e-6), "CRC 脱锚时按市价兑出");
         });
 
+        Test("杰克逊博士：没有矿架必上一个；基础卡每次两张；进阶第 10 天起、旗舰第 30 天起；特供货第 20 天起必有旗舰", () =>
+        {
+            var rng = new Rng(11);
+            var first = Dealer.Stock(1, false, false, rng);
+            Check(first.Count(k => k == Dealer.Rig) == 1 && first.Count(k => Dealer.Basic.Contains(k)) == 2 && first.Count == 3, $"第 1 天：矿架 + 两张基础卡：{string.Join(",", first)}");
+            int adv = 0, flag = 0, rigs = 0, n = 4000;
+            for (int i = 0; i < n; i++)
+            {
+                var s9 = Dealer.Stock(9, true, false, rng);
+                Check(!s9.Any(k => Dealer.Advanced.Contains(k) || Dealer.Flagship.Contains(k)), "第 9 天没有进阶与旗舰");
+                var s40 = Dealer.Stock(40, true, false, rng);
+                if (s40.Any(k => Dealer.Advanced.Contains(k))) adv++;
+                if (s40.Any(k => Dealer.Flagship.Contains(k))) flag++;
+                if (s40.Contains(Dealer.Rig)) rigs++;
+            }
+            Check(Near(adv / (double)n, 0.60, 0.03) && Near(flag / (double)n, 0.25, 0.03) && Near(rigs / (double)n, 0.30, 0.03),
+                $"第 40 天：进阶 {adv / (double)n:P0}（60%），旗舰 {flag / (double)n:P0}（25%），已有矿架时再上 {rigs / (double)n:P0}（30%）");
+            Check(Dealer.Stock(20, true, true, rng).Any(k => Dealer.Flagship.Contains(k)) && !Dealer.Stock(19, true, true, new Rng(1)).Any(k => Dealer.Flagship.Contains(k)),
+                "特供货：第 20 天起必有旗舰，第 19 天没有");
+            Check(Dealer.Basic.Concat(Dealer.Advanced).Concat(Dealer.Flagship).All(m => Hardware.Specs.ContainsKey(m) && !Hardware.Specs[m].Asic), "上架的型号都是登记过的显卡");
+        });
+
         Test("存档：市场、稳定币、全网、钱包、交易所、随机数序列化后读回，之后的结果一致", () =>
         {
             var m = Market.CreateDefault(3);