fix: Via Láctea ~3.5x mais brilhante — era imperceptível sob scanlines

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015HtPHsTnDcLVSCiF5FGHZj

plugin/contents/ui/dancer.html

@@ -1309,7 +1309,7 @@ const mwPoints = [];
       ra:    (Math.atan2(ey, ex) / DEG + 360) % 360,
       dec:   Math.asin(ez) / DEG,
       size:  26 + rand() * 55,
-      alpha: bright * (0.012 + rand() * 0.03),
+      alpha: bright * (0.04 + rand() * 0.075),
     });
   }
 })();