draw the grid note after the grid is known

app/static/index.html

@@ -744,8 +744,8 @@ async function pick(a){
   prompt_(a);
   drawTV(a);
   $("rk-sub").textContent = R.assets[a].label + " · $500 · " + R.assets[a].why;
-  drawGrid(a);
   await Promise.all([drawChart(a), drawRank(a)]);
+  drawGrid(a);          /* 격자 정보는 drawChart 가 채운다. 그 뒤에 그린다. */
 }
 
 async function drawChart(a){