config: properly configure ESLint for .svelte.ts files

- Install svelte-eslint-parser package
- Add dedicated ESLint configuration for .svelte.ts files
- Configure Svelte parser with TypeScript support for runes
- Remove file ignores - all source files are now properly linted

bun.lock

@@ -37,6 +37,7 @@
         "prettier-plugin-svelte": "^3.3.3",
         "svelte": "^5.43.8",
         "svelte-check": "^4.3.4",
+        "svelte-eslint-parser": "^1.6.0",
         "tailwindcss": "^4.1.17",
         "tw-animate-css": "^1.4.0",
         "typescript": "^5.9.3",

eslint.config.js

@@ -2,6 +2,7 @@ import js from '@eslint/js';
 import ts from 'typescript-eslint';
 import svelte from 'eslint-plugin-svelte';
 import globals from 'globals';
+import svelteParser from 'svelte-eslint-parser';
 
 /** @type {import('eslint').Linter.Config[]} */
 export default [
@@ -21,6 +22,7 @@ export default [
       'svelte/no-navigation-without-base': 'off'
     }
   },
+  // Configuration for .svelte files
   {
     files: ['**/*.svelte'],
     languageOptions: {
@@ -29,7 +31,17 @@ export default [
       }
     }
   },
+  // Configuration for .svelte.ts files (Svelte runes in TypeScript)
   {
-    ignores: ['build/', '.svelte-kit/', 'dist/', '**/*.svelte.ts']
+    files: ['**/*.svelte.ts'],
+    languageOptions: {
+      parser: svelteParser,
+      parserOptions: {
+        parser: ts.parser
+      }
+    }
+  },
+  {
+    ignores: ['build/', '.svelte-kit/', 'dist/']
   }
 ];

package.json

@@ -37,6 +37,7 @@
     "prettier-plugin-svelte": "^3.3.3",
     "svelte": "^5.43.8",
     "svelte-check": "^4.3.4",
+    "svelte-eslint-parser": "^1.6.0",
     "tailwindcss": "^4.1.17",
     "tw-animate-css": "^1.4.0",
     "typescript": "^5.9.3",