fix: remove unused imports and variables from server files to resolve build errors.

src/client/dev-dist/sw.js

@@ -82,7 +82,7 @@ define(['./workbox-5a5d9309'], (function (workbox) { 'use strict';
     "revision": "3ca0b8505b4bec776b69afdba2768812"
   }, {
     "url": "index.html",
-    "revision": "0.56865l1cj5s"
+    "revision": "0.l4u3i9b5p1c"
   }], {});
   workbox.cleanupOutdatedCaches();
   workbox.registerRoute(new workbox.NavigationRoute(workbox.createHandlerBoundToURL("index.html"), {

src/server/game/RulesEngine.ts

@@ -1,5 +1,5 @@
 
-import { StrictGameState, PlayerState, Phase, Step, StackObject } from './types';
+import { StrictGameState, Phase, Step } from './types';
 
 export class RulesEngine {
   public state: StrictGameState;
@@ -561,7 +561,7 @@ export class RulesEngine {
     }
   }
 
-  private cleanupStep(playerId: string) {
+  private cleanupStep(_playerId: string) {
     // Remove damage, discard down to 7
     console.log(`Cleanup execution.`);
     Object.values(this.state.cards).forEach(c => {

src/server/managers/PersistenceManager.ts

@@ -4,12 +4,10 @@ import path from 'path';
 import { RoomManager } from './RoomManager';
 import { DraftManager } from './DraftManager';
 import { GameManager } from './GameManager';
-import { fileURLToPath } from 'url';
+
 import { RedisClientManager } from './RedisClientManager';
 
-// Handling __dirname in ESM
-const __filename = fileURLToPath(import.meta.url);
-const __dirname = path.dirname(__filename);
+
 
 // Store data in src/server/data so it persists (assuming not inside a dist that gets wiped, but user root)
 const DATA_DIR = path.resolve(process.cwd(), 'server-data');

src/server/services/CardService.ts

@@ -1,5 +1,5 @@
 
-import fs from 'fs';
+
 import path from 'path';
 import { fileURLToPath } from 'url';
 import { fileStorageManager } from '../managers/FileStorageManager';