A duel server: rooms, seat tokens, ledgers, and resolution when all have moved

Plain HTTP for actions and a websocket that only says "fetch again". A
room is its append-only ledger replayed from the top; the engine is
deterministic given the seed and the recorded inputs. Each seat sees a
view filtered to what the rules let it know. Bot seats are filled at
resolution time.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

server/tsconfig.json

@@ -0,0 +1,14 @@
+{
+	"compilerOptions": {
+		"target": "es2022",
+		"module": "esnext",
+		"moduleResolution": "bundler",
+		"strict": true,
+		"noEmit": true,
+		"skipLibCheck": true,
+		"esModuleInterop": true,
+		"types": ["node"]
+	},
+	"include": ["src/**/*.ts", "../src/lib/game/**/*.ts"],
+	"exclude": ["../src/lib/game/*.test.ts", "../src/lib/game/*.svelte.ts", "../src/lib/game/test-helpers.ts"]
+}