Improve drawing symbols and sample popup

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

도면작성/dxf.ts

@@ -66,7 +66,7 @@ export function exportDxf(doc: DrawingDocument,visible: ReadonlySet<Layer>): str
       const a=translate(e.a,offset),b2=translate(e.b,offset);
       const definition:Point=e.axis==='x'?[b2[0],e.position+offset[1]]:[e.position+offset[0],b2[1]];
       const mid:Point=e.axis==='x'?[(a[0]+b2[0])/2,definition[1]+e.height]:[definition[0]-e.height,(a[1]+b2[1])/2];
-      entities+=pairs(0,'DIMENSION')+common(e,modelRecord,view.scale)+pairs(100,'AcDbDimension',2,name,10,definition[0],20,definition[1],30,0,11,mid[0],21,mid[1],31,0,70,32,1,'<>',3,`PZ_${view.scale}`,42,e.value,
+      entities+=pairs(0,'DIMENSION')+common(e,modelRecord,view.scale)+pairs(100,'AcDbDimension',2,name,10,definition[0],20,definition[1],30,0,11,mid[0],21,mid[1],31,0,70,32,1,e.label??'<>',3,`PZ_${view.scale}`,42,e.value,
         100,'AcDbAlignedDimension',13,a[0],23,a[1],33,0,14,b2[0],24,b2[1],34,0,50,e.axis==='x'?0:90,100,'AcDbRotatedDimension')+xdata(e,view.id);
     }
     const source={member:'view-title',index:0,pier:doc.pier};