Refactor ESLint configuration and update code formatting: Standardize quotes in eslint.config.mjs, next.config.js, and various TypeScript files for consistency. Add Prettier as a dependency and include formatting scripts in package.json. Clean up unnecessary whitespace in multiple files to enhance code readability.

components/PlayerStats.tsx

@@ -130,8 +130,8 @@ export default function PlayerStats({ initialUserData }: PlayerStatsProps) {
     hpPercentage > 60
       ? "from-green-600 to-green-700"
       : hpPercentage > 30
-      ? "from-yellow-600 to-orange-700"
-      : "from-red-700 to-red-900";
+        ? "from-yellow-600 to-orange-700"
+        : "from-red-700 to-red-900";
 
   return (
     <div className="flex items-center gap-3">