fix(ui): strip literal br tags from game descriptions

Some ETI game descriptions include the literal string <br> in metadata.
React renders descriptions as text, so the marker appears to users instead
of being treated as a line break.

Strip only the exact <br> token at the detail modal boundary. This keeps
the fix UI-only and avoids treating descriptions as HTML or normalizing any
other markup-like text.

Test Plan:
- just frontend-test
- git diff --check

Refs: none

crates/lanspread-tauri-deno-ts/src/components/modals/GameDetailModal.tsx

@@ -50,6 +50,8 @@ export const GameDetailModal = ({
     onViewFiles,
 }: Props) => {
     const tags = tagsFromGame(game);
+    // Some game metadata contains a literal <br>; keep sanitization exact.
+    const description = game.description.split('<br>').join('');
     const canRemoveDownload = game.downloaded
         && !game.installed
         && !isInProgress(game.install_status);
@@ -102,8 +104,8 @@ export const GameDetailModal = ({
                     </div>
                 </div>
 
-                {game.description && (
-                    <p className="modal-desc">{game.description}</p>
+                {description && (
+                    <p className="modal-desc">{description}</p>
                 )}
 
                 {game.status_message && (