Add linter

eslint.config.js

+import globals from 'globals'
+import pluginJs from '@eslint/js'
+import tseslint from 'typescript-eslint'
+import oxlint from 'eslint-plugin-oxlint'
+
+/** @type {import('eslint').Linter.Config[]} */
+export default [
+  { files: ['**/*.{js,mjs,cjs,ts}'] },
+
+  {
+    name: 'app/files-to-ignore',
+    ignores: ['**/dist/**', '**/dist-ssr/**', '**/coverage/**', '**/__tests__/**', '**/*.spec.ts'],
+  },
+
+  { languageOptions: { globals: globals.browser } },
+
+  pluginJs.configs.recommended,
+  ...tseslint.configs.recommended,
+
+  oxlint.configs['flat/recommended'],
+
+  {
+    rules: {
+      'no-loss-of-precision': 'off',
+      '@typescript-eslint/ban-ts-comment': ['error', { 'ts-ignore': 'allow-with-description' }],
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      '@typescript-eslint/no-unused-vars': [
+        'warn',
+        {
+          ignoreRestSiblings: true,
+          varsIgnorePattern: '^_',
+          argsIgnorePattern: '^_',
+          caughtErrors: 'none',
+        },
+      ],
+    },
+  },
+]

package.json

@@ -23,19 +23,27 @@
     "test:ui": "vitest --ui --coverage",
     "test:coverage": "vitest --coverage",
     "format": "prettier --config ../../.prettierrc.json --write src/",
-    "format:silent": "prettier --config ../../.prettierrc.json --log-level silent --write src/"
+    "format:silent": "prettier --config ../../.prettierrc.json --log-level silent --write src/",
+    "lint": "eslint . --fix",
+    "oxlint": "oxlint . -c .oxlintrc.json --fix -D correctness --ignore-path .gitignore"
   },
   "keywords": [],
   "author": "",
   "license": "ISC",
   "devDependencies": {
+    "@eslint/js": "^9.14.0",
     "@types/node": "^20.17.6",
     "@vitest/coverage-v8": "^2.1.4",
     "@vitest/ui": "^2.1.4",
     "dayjs": "^1.11.13",
+    "eslint": "^9.14.0",
+    "eslint-plugin-oxlint": "^0.11.1",
+    "globals": "^15.12.0",
+    "oxlint": "^0.11.1",
     "prettier": "^3.3.3",
     "rollup-plugin-visualizer": "^5.12.0",
     "typescript": "^5.6.3",
+    "typescript-eslint": "^8.14.0",
     "vite": "^5.4.11",
     "vitest": "^2.1.4"
   }