chore(lint): remove ESLint configuration file and update lint scripts

- Deleted the .eslintrc.cjs file to simplify configuration management.
- Updated lint scripts in package.json to remove unnecessary extensions for linting.
- Added new devDependencies for ESLint and globals to enhance linting capabilities.

eslint.config.mjs

@@ -0,0 +1,43 @@
+import js from '@eslint/js';
+import tsPlugin from '@typescript-eslint/eslint-plugin';
+import tsParser from '@typescript-eslint/parser';
+import reactHooks from 'eslint-plugin-react-hooks';
+import reactRefresh from 'eslint-plugin-react-refresh';
+import globals from 'globals';
+
+export default [
+  {
+    ignores: ['dist/**', 'dist-electron/**', 'openclaw/**'],
+  },
+  {
+    files: ['**/*.{ts,tsx}'],
+    languageOptions: {
+      parser: tsParser,
+      ecmaVersion: 2020,
+      sourceType: 'module',
+      globals: {
+        ...globals.browser,
+        ...globals.es2020,
+        ...globals.node,
+      },
+    },
+    plugins: {
+      '@typescript-eslint': tsPlugin,
+      'react-hooks': reactHooks,
+      'react-refresh': reactRefresh,
+    },
+    rules: {
+      ...js.configs.recommended.rules,
+      ...tsPlugin.configs.recommended.rules,
+      ...reactHooks.configs.recommended.rules,
+      // TypeScript handles these checks natively, disable ESLint duplicates
+      'no-undef': 'off',
+      'react-refresh/only-export-components': [
+        'warn',
+        { allowConstantExport: true },
+      ],
+      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_', varsIgnorePattern: '^_', destructuredArrayIgnorePattern: '^_' }],
+      '@typescript-eslint/no-explicit-any': 'warn',
+    },
+  },
+];