chore(web): eslint flat-config + prettier setup

web/eslint.config.js

@@ -0,0 +1,37 @@
+// ESLint v10 flat config。
+// 覆盖范围：src/、test/ 下的 .vue/.ts/.tsx 文件。dist/、node_modules、配置类
+// 文件 (vite.config.ts、postcss.config.js 等) 默认走 ignore。
+import js from '@eslint/js'
+import tseslint from 'typescript-eslint'
+import vue from 'eslint-plugin-vue'
+import vueParser from 'vue-eslint-parser'
+
+export default [
+  {
+    ignores: ['dist/**', 'node_modules/**', '**/*.d.ts', 'src/**/*.js', 'vite.config.js'],
+  },
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  ...vue.configs['flat/recommended'],
+  {
+    files: ['**/*.vue'],
+    languageOptions: {
+      parser: vueParser,
+      parserOptions: {
+        parser: tseslint.parser,
+        ecmaVersion: 2022,
+        sourceType: 'module',
+      },
+    },
+  },
+  {
+    files: ['**/*.{ts,tsx,vue}'],
+    rules: {
+      'vue/multi-word-component-names': 'off',
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        { argsIgnorePattern: '^_', varsIgnorePattern: '^_' },
+      ],
+    },
+  },
+]