Katan: Cities & Knights docs, knight menu for any own knight, tidier player card

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_016eTor2tpxKb4dXbd8RqnvZ

README.md

@@ -373,7 +373,9 @@ game:
   the game is out of print and the rulebook could not be obtained, so the
   document says which parts are attested and which were derived
 - [Katan](docs/RULES-catan.md) — the island game (catalogue id `catan`); the
-  rules engine and AI are in place, the screen lands with its own task
+  rules engine, AI and screen are in place
+- [Katan: Cities & Knights](docs/RULES-catan-ck.md) — the expansion rule set, chosen on
+  the setup screen: commodities, knights, barbarians, city improvements and progress cards
 
 ## Layout
 
@@ -396,7 +398,7 @@ game/          rules engines and AI — pure Kotlin, no Android, unit-tested
   mastermind/  Mastermind codes, scoring, and a code breaker
   pirates/     Pirates and Bulgars — the cross board, the hunt, search
   tayu/        Ta Yü tile geometry, river rules, scoring, AI
-  catan/       Katan island geometry, production, trade, dev cards, heuristic AI
+  catan/       Katan island geometry, production, trade, dev cards, Cities & Knights, heuristic AI
 net/           wire protocol, LAN transport, lobby, match driver
 score/         scorekeeper sheet — pure Kotlin, unit-tested — and its store
 settings/      DataStore-backed preferences