Ping: veins fade outward in the order found, faster; recharge arc with the drill (t75)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ui/loop.js

@@ -74,6 +74,7 @@ function frame(now) {
   if (GAME.infoOverlay) { drawFlowArrows(); drawFlowRates(); }
   drawJoinMarks();
   drawPing();
+  drawPingRecharge();
   drawFilterTags(!!GAME.infoOverlay, GAME.editRun ? GAME.editRun[0] : hb);
   drawFloaters();
   drawRain();