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>

package.json

@@ -11,16 +11,25 @@
 		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
 		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
 		"test": "vitest run",
-		"test:watch": "vitest"
+		"test:watch": "vitest",
+		"server": "tsx watch server/src/index.ts",
+		"server:start": "tsx server/src/index.ts",
+		"check:server": "tsc --noEmit -p server"
 	},
 	"devDependencies": {
 		"@sveltejs/adapter-static": "^3.0.10",
 		"@sveltejs/kit": "^2.63.0",
 		"@sveltejs/vite-plugin-svelte": "^7.1.2",
+		"@types/node": "^26.6.2",
+		"@types/ws": "^8.18.1",
 		"svelte": "^5.56.1",
 		"svelte-check": "^4.6.0",
+		"tsx": "^4.23.15",
 		"typescript": "^6.0.3",
 		"vite": "^8.0.16",
 		"vitest": "^5.0.1"
+	},
+	"dependencies": {
+		"ws": "^8.21.3"
 	}
 }