Add client ESLint flat config and pass lint

client/eslint.config.js

@@ -0,0 +1,31 @@
+import tsParser from '@typescript-eslint/parser';
+import tsPlugin from '@typescript-eslint/eslint-plugin';
+
+export default [
+  {
+    ignores: ['dist/**', 'node_modules/**'],
+  },
+  {
+    files: ['src/**/*.ts'],
+    languageOptions: {
+      parser: tsParser,
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+    },
+    plugins: {
+      '@typescript-eslint': tsPlugin,
+    },
+    rules: {
+      'no-undef': 'off',
+      'no-unused-vars': 'off',
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        {
+          argsIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+          caughtErrorsIgnorePattern: '^_',
+        },
+      ],
+    },
+  },
+];

client/src/main.ts

@@ -21,7 +21,6 @@ import {
   getDirection,
   getNearestItem,
   getNearestPeer,
-  type GameState,
   type ItemType,
   type WorldItem,
 } from './state/gameState';