Improve drawing export and foundation quantity views

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

도면작성/breaks.ts

@@ -12,7 +12,7 @@ export function modelBreaks(model:PierModel,scale:number): ViewBreak[] {
     const keepBottom=Math.max(member==='column'?900:350,diameter*.65);
     const keepTop=Math.max(member==='column'?1300:500,diameter*.9);
     const from=bottom+keepBottom,to=top-keepTop;
-    const gap=member==='column'?diameter+6*scale:3*scale;
+    const gap=member==='column'?diameter+6*scale:1.5*scale;
     if(to-from>Math.max(gap+500,scale*10))result.push({from,to,gap,member});
   }
   return result.sort((a,b)=>a.from-b.from).filter((b,i,all)=>i===0||b.from>=all[i-1].to);