refactor: make game host return the setup promise

src/core/game-host.ts

@@ -1,5 +1,11 @@
 import { ReadonlySignal, Signal } from '@preact/signals-core';
-import type {CommandSchema, CommandRegistry, PromptEvent, CommandRunnerContextExport} from '@/utils/command';
+import type {
+    CommandSchema,
+    CommandRegistry,
+    PromptEvent,
+    CommandRunnerContextExport,
+    CommandResult
+} from '@/utils/command';
 import type { MutableSignal } from '@/utils/mutable-signal';
 import {createGameContext, IGameContext} from './game';
 
@@ -93,7 +99,7 @@ export class GameHost<TState extends Record<string, unknown>> {
         this._state.clearInterruptions();
     }
 
-    async setup(setupCommand: string): Promise<void> {
+    setup(setupCommand: string): Promise<CommandResult<unknown>> {
         if (this._isDisposed) {
             throw new Error('GameHost is disposed');
         }
@@ -103,14 +109,12 @@ export class GameHost<TState extends Record<string, unknown>> {
         const initialState = this._createInitialState();
         this._state.value = initialState as any;
 
-        // Start the setup command but don't wait for it to complete
-        // The command will run in the background and prompt for input
-        this._commands.run(setupCommand).catch(() => {
-            // Command may be cancelled or fail, which is expected
-        });
+        const promise = this._commands.run(setupCommand);
 
         this._status.value = 'running';
         this._emitEvent('setup');
+        
+        return promise;
     }
 
     dispose(): void {

tests/core/game-host.test.ts

@@ -150,7 +150,7 @@ describe('GameHost', () => {
             const newPromptPromise = waitForPromptEvent(host);
             
             // Reset - should reset state and start new game
-            await host.setup('setup');
+            host.setup('setup');
 
             // State should be back to initial
             expect(host.context._state.value.currentPlayer).toBe('X');
@@ -173,7 +173,7 @@ describe('GameHost', () => {
             await promptPromise;
 
             // Setup should cancel the active prompt and reset state
-            await host.setup('setup');
+            host.setup('setup');
 
             // The original runPromise should be rejected due to cancellation
             try {
@@ -188,11 +188,11 @@ describe('GameHost', () => {
             expect(host.context._state.value.turn).toBe(0);
         });
 
-        it('should throw error when disposed', async () => {
+        it('should throw error when disposed', () => {
             const { host } = createTestHost();
             host.dispose();
 
-            await expect(host.setup('setup')).rejects.toThrow('GameHost is disposed');
+            expect(() => host.setup('setup')).toThrow('GameHost is disposed');
         });
     });
 
@@ -245,7 +245,7 @@ describe('GameHost', () => {
             const promptPromise = waitForPromptEvent(host);
 
             // Initial setup via reset
-            await host.setup('setup');
+            host.setup('setup');
             expect(setupCount).toBe(1);
 
             // State should be running