diff --git a/eslint.config.js b/eslint.config.js
index 6faf68546..157ff92fc 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -4,48 +4,6 @@ import { defineConfig } from 'eslint/config';
 import globals from 'globals';
 import controlStructureSpacing from './control-structure-spacing.js';
 
-const rules = {
-    'no-unused-vars': ['error', {
-        'vars': 'all',
-        'args': 'after-used',
-        'caughtErrors': 'all',
-        'ignoreRestSiblings': false,
-        'ignoreUsingDeclarations': false,
-        'reportUsedIgnorePattern': false,
-        'argsIgnorePattern': '^_',
-        'caughtErrorsIgnorePattern': '^_',
-        'destructuredArrayIgnorePattern': '^_',
-    }],
-    '@stylistic/curly-newline': ['error', 'always'],
-    '@stylistic/object-curly-spacing': ['error', 'always'],
-    '@stylistic/indent': ['error', 4, {
-        'CallExpression': { arguments: 4 },
-    }],
-    '@stylistic/indent-binary-ops': ['error', 4],
-    '@stylistic/array-bracket-newline': ['error', 'consistent'],
-    '@stylistic/semi': ['error', 'always'],
-    '@stylistic/quotes': ['error', 'single'],
-    '@stylistic/function-call-argument-newline': ['error', 'consistent'],
-    '@stylistic/arrow-spacing': ['error', { before: true, after: true }],
-    '@stylistic/space-before-function-paren': ['error', { 'anonymous': 'never', 'named': 'never', 'asyncArrow': 'always', 'catch': 'never' }],
-    '@stylistic/key-spacing': ['error', { 'beforeColon': false, 'afterColon': true }],
-    '@stylistic/keyword-spacing': ['error', { 'before': true, 'after': true }],
-    '@stylistic/no-multiple-empty-lines': ['error', { max: 1, maxEOF: 0 }],
-    '@stylistic/comma-spacing': ['error', { 'before': false, 'after': true }],
-    '@stylistic/comma-dangle': ['error', 'always-multiline'],
-    '@stylistic/object-property-newline': ['error', { allowAllPropertiesOnSameLine: true }],
-    '@stylistic/dot-location': ['error', 'property'],
-    '@stylistic/space-infix-ops': ['error'],
-    'no-template-curly-in-string': 'error',
-    'prefer-template': 'error',
-    'no-undef': 'error',
-    'no-useless-concat': 'error',
-    'template-curly-spacing': ['error', 'never'],
-    curly: ['error', 'multi-line'],
-    'custom/control-structure-spacing': 'error',
-    '@stylistic/no-trailing-spaces': 'error',
-};
-
 export default defineConfig([
     {
         plugins: {
@@ -55,20 +13,95 @@ export default defineConfig([
         },
     },
     {
-        files: ['**/backend/**/*.{js,mjs,cjs}'],
+        files: ['src/backend/**/*.{js,mjs,cjs}'],
         languageOptions: { globals: globals.node },
-        rules,
-        extends: ['js/recommended'],
-        plugins: {
-            js,
-            '@stylistic': stylistic,
+        rules: {
+            'no-unused-vars': ['error', {
+                'vars': 'all',
+                'args': 'after-used',
+                'caughtErrors': 'all',
+                'ignoreRestSiblings': false,
+                'ignoreUsingDeclarations': false,
+                'reportUsedIgnorePattern': false,
+                'argsIgnorePattern': '^_',
+                'caughtErrorsIgnorePattern': '^_',
+                'destructuredArrayIgnorePattern': '^_',
+            }],
+            '@stylistic/curly-newline': ['error', 'always'],
+            '@stylistic/object-curly-spacing': ['error', 'always'],
+            '@stylistic/indent': ['error', 4, {
+                'CallExpression': { arguments: 4 },
+            }],
+            '@stylistic/indent-binary-ops': ['error', 4],
+            '@stylistic/array-bracket-newline': ['error', 'consistent'],
+            '@stylistic/semi': ['error', 'always'],
+            '@stylistic/quotes': ['error', 'single'],
+            '@stylistic/function-call-argument-newline': ['error', 'consistent'],
+            '@stylistic/arrow-spacing': ['error', { before: true, after: true }],
+            '@stylistic/space-before-function-paren': ['error', { 'anonymous': 'never', 'named': 'never', 'asyncArrow': 'always', 'catch': 'never' }],
+            '@stylistic/key-spacing': ['error', { 'beforeColon': false, 'afterColon': true }],
+            '@stylistic/keyword-spacing': ['error', { 'before': true, 'after': true }],
+            '@stylistic/no-multiple-empty-lines': ['error', { max: 1, maxEOF: 0 }],
+            '@stylistic/comma-spacing': ['error', { 'before': false, 'after': true }],
+            '@stylistic/comma-dangle': ['error', 'always-multiline'],
+            '@stylistic/object-property-newline': ['error', { allowAllPropertiesOnSameLine: true }],
+            '@stylistic/dot-location': ['error', 'property'],
+            '@stylistic/space-infix-ops': ['error'],
+            'no-template-curly-in-string': 'error',
+            'prefer-template': 'error',
+            'no-undef': 'error',
+            'no-useless-concat': 'error',
+            'template-curly-spacing': ['error', 'never'],
+            curly: ['error', 'multi-line'],
+            'custom/control-structure-spacing': 'error',
+            '@stylistic/no-trailing-spaces': 'error',
         },
     },
     {
         files: ['**/*.{js,mjs,cjs}'],
         ignores: ['src/backend/**/*.{js,mjs,cjs}'],
         languageOptions: { globals: globals.browser },
-        rules,
+        rules: {
+            'no-unused-vars': ['error', {
+                'vars': 'all',
+                'args': 'after-used',
+                'caughtErrors': 'all',
+                'ignoreRestSiblings': false,
+                'ignoreUsingDeclarations': false,
+                'reportUsedIgnorePattern': false,
+                'argsIgnorePattern': '^_',
+                'caughtErrorsIgnorePattern': '^_',
+                'destructuredArrayIgnorePattern': '^_',
+            }],
+            '@stylistic/curly-newline': ['error', 'always'],
+            '@stylistic/object-curly-spacing': ['error', 'always'],
+            '@stylistic/indent': ['error', 4, {
+                'CallExpression': { arguments: 4 },
+            }],
+            '@stylistic/indent-binary-ops': ['error', 4],
+            '@stylistic/array-bracket-newline': ['error', 'consistent'],
+            '@stylistic/semi': ['error', 'always'],
+            '@stylistic/quotes': ['error', 'single'],
+            '@stylistic/function-call-argument-newline': ['error', 'consistent'],
+            '@stylistic/arrow-spacing': ['error', { before: true, after: true }],
+            '@stylistic/space-before-function-paren': ['error', { 'anonymous': 'never', 'named': 'never', 'asyncArrow': 'always', 'catch': 'never' }],
+            '@stylistic/key-spacing': ['error', { 'beforeColon': false, 'afterColon': true }],
+            '@stylistic/keyword-spacing': ['error', { 'before': true, 'after': true }],
+            '@stylistic/no-multiple-empty-lines': ['error', { max: 1, maxEOF: 0 }],
+            '@stylistic/comma-spacing': ['error', { 'before': false, 'after': true }],
+            '@stylistic/comma-dangle': ['error', 'always-multiline'],
+            '@stylistic/object-property-newline': ['error', { allowAllPropertiesOnSameLine: true }],
+            '@stylistic/dot-location': ['error', 'property'],
+            '@stylistic/space-infix-ops': ['error'],
+            'no-template-curly-in-string': 'error',
+            'prefer-template': 'error',
+            'no-undef': 'error',
+            'no-useless-concat': 'error',
+            'template-curly-spacing': ['error', 'never'],
+            curly: ['error', 'multi-line'],
+            'custom/control-structure-spacing': 'error',
+            '@stylistic/no-trailing-spaces': 'error',
+        },
         extends: ['js/recommended'],
         plugins: {
             js,