fix: ignore underscore-prefixed unused args in eslint (#19)

Add argsIgnorePattern: '^_' to no-unused-vars so intentionally unused
handler args prefixed with _ stop failing the frontend lint step.

Author: PttCodingMan

frontend/eslint.config.js

@@ -23,7 +23,7 @@ export default defineConfig([
       },
     },
     rules: {
-      'no-unused-vars': ['error', { varsIgnorePattern: '^[A-Z_]' }],
+      'no-unused-vars': ['error', { varsIgnorePattern: '^[A-Z_]', argsIgnorePattern: '^_' }],
     },
   },
 ])