Fewer, smaller messages: mold percentages, markers for machine heat, short status lines

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

src/render/machines.js

@@ -52,6 +52,11 @@ function drawMachines() {
         const a = mm.angle + k * Math.PI * 2 / 3;
         ctx.beginPath(); ctx.ellipse(cx + Math.cos(a) * sw * 0.18, cy + Math.sin(a) * sw * 0.18, sw * 0.17, sw * 0.07, a, 0, Math.PI * 2); ctx.fill();
       }
+      if (mm.hot > 760) {
+        const sz = Math.max(10, zp * 2), x = sx + sw - sz * 0.6, y = sy - sz * 0.4;
+        ctx.save(); ctx.fillStyle = '#b84332'; ctx.beginPath(); ctx.roundRect(x, y, sz, sz, sz * 0.2); ctx.fill();
+        ctx.fillStyle = '#fff'; ctx.font = `700 ${sz * 0.85}px monospace`; ctx.textAlign = 'center'; ctx.textBaseline = 'middle'; ctx.fillText('!', x + sz / 2, y + sz / 2); ctx.restore();
+      }
       // direction arrow
       const dx = [1, 0, -1, 0][mm.dir], dy = [0, 1, 0, -1][mm.dir];
       ctx.strokeStyle = sat > 0.05 && mm.on ? 'rgba(160,220,255,0.7)' : 'rgba(160,170,180,0.35)'; ctx.lineWidth = Math.max(1, zp * 0.35);