Implemented phase 6 for the POC prototype in the Website service.

Services/Website/Tests/Library/Cases/Internal/Pages/TradePagesTests.swift

@@ -228,7 +228,9 @@ struct TradePagesTests {
             viewer: .init(displayName: "Joost", shopSlug: "kestrel-row-comics")
         ).render()
 
-        #expect(sold.contains("This copy is sold."))
+        #expect(sold.contains("This copy sold on 23 Sep."))
+        #expect(sold.contains("Kestrel Row Comics has 0 more copies of Nightward #1, and 0 are listed across CCN."))
+        #expect(sold.contains(#"href="/wants/new?title=Nightward%20%231""#))
         #expect(!sold.contains("Buy now"))
         #expect(own.contains("This is your listing."))
         #expect(!own.contains("Make an offer"))