Hardware wallet window: invoices paid from PLEDGER, checksummed addresses, DEX signing, block confirmation animation

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

tests/Decentralized.Domain.Tests/Program.cs

@@ -789,6 +789,25 @@ internal static class Program
             Check(personalListings > 100 && lo < 0.65 && hi > 1.05, $"个人卖家每件价格系数分散：{lo:0.00}–{hi:0.00}");
         });
 
+        Test("链上地址校验位", () =>
+        {
+            var rng = new Rng(5);
+            int caught = 0, typos = 0;
+            for (int i = 0; i < 2000; i++)
+            {
+                string a = ChainAddress.Make(rng.NextUInt());
+                Check(ChainAddress.Valid(a) && ChainAddress.Valid(a.ToUpperInvariant().Replace("0X", "0x")) && ChainAddress.Valid(" " + a + " "), "生成的地址合法，大小写、空格不影响：" + a);
+                int pos = 2 + rng.Range(0, ChainAddress.BodyLength + ChainAddress.CheckLength - 1);
+                char c = a[pos];
+                char t = "0123456789abcdef"[(Convert.ToInt32(c.ToString(), 16) + 1 + rng.Range(0, 14)) % 16];
+                string typo = a.Substring(0, pos) + t + a.Substring(pos + 1);
+                typos++;
+                if (!ChainAddress.Valid(typo)) caught++;
+            }
+            Check(caught > typos * 0.98 && caught < typos, $"输错一位几乎都被校验位拦下，极少数碰巧合法：{caught}/{typos}");
+            Check(!ChainAddress.Valid("0x12345") && !ChainAddress.Valid("0xzzzzzzzz") && !ChainAddress.WellFormed("12345678ab"), "格式不对的地址不合法");
+        });
+
         Console.WriteLine($"\n{_passed} 通过，{_failed} 失败");
         return _failed == 0 ? 0 : 1;
     }