Merge remote-tracking branch 'origin/main' into ui

Author: na-trium-144

routes/game/+page.svelte

@@ -1,10 +1,13 @@
 <script lang="ts">
+import { browser } from "$app/environment";
 import { page } from "$app/state";
 import GameLoader from "@/components/GameLoader.svelte";
 import { stages } from "@/stages";
 
-const stageNum = page.url.searchParams.get("stage") ?? "";
-const stageDefinition = $derived(stages.get(stageNum));
+const stageNum = $derived(
+  browser ? (page.url.searchParams.get("stage") ?? "") : "",
+);
+const stageDefinition = stages.get(stageNum);
 </script>
 
 <GameLoader stage={stageDefinition} {stageNum}>