v0.6.9: stop serving match-template crops as hero portraits.

Export and OSS upload require wide Heroes-page cards only; bump cache stamp to wide2 so clients drop polluted squares.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/frontend/app.js

@@ -31,7 +31,8 @@ function attrIconSrc(key) {
 }
 
 function portraitSrc(key) {
-  return assetUrl(`portrait/${encodeURIComponent(key)}.png?v=wide`);
+  // Cache-bust if OSS was briefly polluted with 96×96 match crops.
+  return assetUrl(`portrait/${encodeURIComponent(key)}.png?v=wide2`);
 }
 
 function abilityIconSrc(abilityKey) {