fix reverse animation play and improve code structure

eslint.config.mjs

@@ -0,0 +1,133 @@
+import js from '@eslint/js';
+import globals from 'globals';
+import tseslint from '@typescript-eslint/eslint-plugin';
+import tsParser from '@typescript-eslint/parser';
+import mochaPlugin from 'eslint-plugin-mocha';
+import wcPlugin from 'eslint-plugin-wc';
+
+export default [
+  {
+    ignores: [
+      '**/node_modules',
+      'scripts/**/*.js',
+      'packages/*/dist',
+      'packages/**/*.d.ts',
+      'packages/*/src/*-css.ts',
+    ],
+  },
+  js.configs.recommended,
+  {
+    files: ['**/*.ts', '**/*.js'],
+    languageOptions: {
+      ecmaVersion: 2017,
+      sourceType: 'module',
+      globals: {
+        ...globals.browser,
+        goog: false,
+      },
+      parser: tsParser,
+      parserOptions: {
+        ecmaVersion: 2017,
+        sourceType: 'module',
+      },
+    },
+    plugins: {
+      '@typescript-eslint': tseslint,
+      mocha: mochaPlugin,
+      wc: wcPlugin,
+    },
+    settings: {
+      wc: {
+        elementBaseClasses: ['BaseElement', 'LitElement', 'FormElement'],
+      },
+    },
+    rules: {
+      // قوانین پایه
+      '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/indent': 'off',
+      'indent': 'off',
+      'max-len': 'off',
+      'block-spacing': 'off',
+      'keyword-spacing': 'off',
+      'space-before-function-paren': 'off',
+      '@typescript-eslint/explicit-member-accessibility': ['error', { accessibility: 'no-public' }],
+
+      // سبک کدنویسی
+      'no-new': 'warn',
+      'quotes': ['error', 'single', { avoidEscape: true }],
+      'no-var': 'error',
+      'curly': 'error',
+      'no-floating-decimal': 'error',
+      'prefer-const': 'error',
+      'comma-dangle': 'off',
+      'require-jsdoc': 'off',
+      'valid-jsdoc': 'off',
+
+      // برای type/const هم‌نام و shadow
+      'no-redeclare': 'off',
+      'no-shadow': 'off',
+      '@typescript-eslint/no-shadow': 'off',
+      'no-undef': 'off',
+
+      // استفاده نشده‌ها
+      'no-unused-vars': 'error',
+      '@typescript-eslint/no-unused-vars': 'off',
+
+      // قوانین mocha
+      'mocha/handle-done-callback': 'error',
+      'mocha/no-exclusive-tests': 'error',
+      'mocha/no-identical-title': 'error',
+      'mocha/no-nested-tests': 'error',
+      'mocha/no-pending-tests': 'error',
+    },
+  },
+  {
+    files: ['packages/**/*.ts'],
+    rules: {
+      'no-unused-vars': 'off',
+      'no-invalid-this': 'off',
+      'new-cap': 'off',
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      'no-undef': 'off',
+    },
+  },
+  {
+    files: [
+      'packages/**/test/**/*.ts',
+      'packages/**/test/**/*.js',
+      'packages/**/*.spec.ts',
+      'packages/**/*.spec.js',
+      'packages/**/*.spec.mjs',
+      'packages/**/*.spec.cjs',
+      'packages/**/*.test.ts',
+      'packages/**/*.test.js',
+      'packages/**/*.test.mjs',
+      'packages/**/*.test.cjs',
+    ],
+    languageOptions: {
+      globals: {
+        ...globals.mocha,
+        ...globals.browser,
+        goog: false,
+      },
+    },
+  },
+  {
+    files: [
+      'scripts/**/*.js',
+      'packages/render-fidelity-tools/**/*.{js,ts}',
+      'packages/model-viewer/scripts/**/*.js',
+      'packages/model-viewer/tools/**/*.js',
+      'packages/model-viewer/tools/**/*.ts',
+      'packages/model-viewer-effects/scripts/**/*.js',
+      'packages/model-viewer-effects/tools/**/*.js',
+      'packages/model-viewer-effects/tools/**/*.ts',
+    ],
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        goog: false,
+      },
+    },
+  },
+];