fix: set basePath for GitHub Pages deployment

Assets and routes now correctly resolve under /loldle subdirectory.

web/lib/champion-data.js

@@ -9,7 +9,7 @@ export async function loadChampions() {
   if (loadPromise) return loadPromise;
 
   loadPromise = (async () => {
-    const response = await fetch("/champions.json");
+    const response = await fetch(`/loldle/champions.json`);
     if (!response.ok) {
       loadPromise = null;
       throw new Error(`Failed to load champions: ${response.status}`);

web/next.config.mjs

@@ -1,6 +1,7 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   output: "export",
+  basePath: "/loldle",
   images: {
     unoptimized: true,
   },