chore: add eslint config

eslint.config.js

@@ -0,0 +1,40 @@
+import prettier from 'eslint-config-prettier';
+import { includeIgnoreFile } from '@eslint/compat';
+import js from '@eslint/js';
+import svelte from 'eslint-plugin-svelte';
+import globals from 'globals';
+import { fileURLToPath } from 'node:url';
+import ts from 'typescript-eslint';
+import svelteConfig from './svelte.config.js';
+
+const gitignorePath = fileURLToPath(new URL('./.gitignore', import.meta.url));
+
+export default ts.config(
+  includeIgnoreFile(gitignorePath),
+  js.configs.recommended,
+  ...ts.configs.recommended,
+  ...svelte.configs.recommended,
+  prettier,
+  ...svelte.configs.prettier,
+  {
+    languageOptions: {
+      globals: { ...globals.browser, ...globals.node },
+    },
+    rules: {
+      // typescript-eslint strongly recommend that you do not use the no-undef lint rule on TypeScript projects.
+      // see: https://typescript-eslint.io/troubleshooting/faqs/eslint/#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
+      'no-undef': 'off',
+    },
+  },
+  {
+    files: ['**/*.svelte', '**/*.svelte.ts', '**/*.svelte.js'],
+    languageOptions: {
+      parserOptions: {
+        projectService: true,
+        extraFileExtensions: ['.svelte'],
+        parser: ts.parser,
+        svelteConfig,
+      },
+    },
+  }
+);

package.json

@@ -14,7 +14,7 @@
     "tauri": "tauri",
     "update-logo": "bun run tauri icon ./static/logo.png",
     "format": "prettier --write .",
-    "lint": "prettier --check ."
+    "lint": "prettier --check . && eslint ."
   },
   "license": "MIT",
   "dependencies": {
@@ -40,6 +40,8 @@
     "svelte-confetti": "^2.0.0"
   },
   "devDependencies": {
+    "@eslint/compat": "^1.2.5",
+    "@eslint/js": "^9.18.0",
     "@lucide/svelte": "^0.482.0",
     "@sveltejs/adapter-static": "3.0.8",
     "@sveltejs/kit": "2.22.2",
@@ -49,6 +51,10 @@
     "autoprefixer": "10.4.21",
     "bits-ui": "^1.4.7",
     "clsx": "2.1.1",
+    "eslint": "^9.18.0",
+    "eslint-config-prettier": "^10.0.1",
+    "eslint-plugin-svelte": "^3.0.0",
+    "globals": "^16.0.0",
     "mode-watcher": "^1.0.6",
     "prettier": "^3.4.2",
     "prettier-plugin-svelte": "^3.3.3",
@@ -62,6 +68,7 @@
     "tailwindcss-animate": "1.0.7",
     "tslib": "2.8.1",
     "typescript": "5.8.3",
+    "typescript-eslint": "^8.20.0",
     "vite": "7.0.0",
     "vite-plugin-devtools-json": "^0.2.0"
   }