Hot loads: visible melt damage, rebuild-over repair, warning glow (t69)

src/ui/info.js

@@ -134,6 +134,14 @@ function hoverInfo(ax, ay) {
   }
   else if (isWall(b) && PH[m] === PH_SOLID && !(flags[i] & F_NAT)) t1 = `${MD[m].name} ${isSlope(b) ? 'sloped wall' : 'block'}`;
   const jb = ((ay / BS) | 0) * BW + ((ax / BS) | 0);
+  if (b === BP_SCREW && !bar) {
+    if (screwDamageMask(jb)) {
+      t1 = 'Screw conveyor · melted'; warn = 'needs rebuilding';
+      t2.push('Melted from carrying a load hotter than 1000°C.', 'Build a screw conveyor over it to repair it for the price of one piece.');
+    } else if (screwLoadHeat(jb) >= 900) {
+      warn = 'near heat limit'; t2.push(`${Math.round(screwLoadHeat(jb))}°C load · melts above 1000°C`);
+    }
+  }
   if (GAME.infoOverlay && !id && !bar && pieceEnds(blockP[jb], blockV[jb]).length) t2.push(`moving ${(flowRate[jb] || 0).toFixed(1)} grains/s`);
   for (let end = 0; end < 2 && !id && !bar; end++) {
     const miss = nearMiss(jb % BW, (jb / BW) | 0, end);