Use concise dynamic rebar labels in beam section

Render bar-group callouts as (n) #size and stirrups as #size @ spacing,
driven entirely by the input values.

concrete-beam/assets/beam-section.typ

@@ -17,12 +17,12 @@
     #place(dx: 0.5pt, dy: 82pt, text(size: 7pt)[$h = 12 " in"$])
     #place(line(start: (110.1pt, 41.88pt), end: (129pt, 42pt), stroke: 0.5pt + rgb("#626b73")))
     #place(dx: 108.6pt, dy: 40.38pt, circle(radius: 1.5pt, fill: black))
-    #place(dx: 132pt, dy: 37pt, text(size: 7pt)[2 No. 4 hanger \ bars])
+    #place(dx: 132pt, dy: 37pt, text(size: 7pt, "(2) #4"))
     #place(line(start: (113.5pt, 85pt), end: (129pt, 82pt), stroke: 0.5pt + rgb("#626b73")))
     #place(dx: 112pt, dy: 83.5pt, circle(radius: 1.5pt, fill: black))
-    #place(dx: 132pt, dy: 77pt, text(size: 7pt)[No. 3 stirrup \ at 6 in o.c.])
+    #place(dx: 132pt, dy: 77pt, text(size: 7pt, "#3 @ 6″"))
     #place(line(start: (109.5pt, 127.5pt), end: (129pt, 128pt), stroke: 0.5pt + rgb("#626b73")))
     #place(dx: 108pt, dy: 126pt, circle(radius: 1.5pt, fill: black))
-    #place(dx: 132pt, dy: 123pt, text(size: 7pt)[2 No. 5 bottom \ $A_s = 0.6136 " in"^2$])
+    #place(dx: 132pt, dy: 123pt, text(size: 7pt, "(2) #5"))
   ]
 }

concrete-beam/beam_section.py

@@ -44,7 +44,6 @@ def render(values: dict) -> str:
     top_bar_size = int(values["top_bar_size"])
     top_bar_db = float(values["top_bar_db"])
     n_top_bars = int(values["n_top_bars"])
-    As = float(values["As"])
 
     w_sec = bw * s
     h_sec = h * s
@@ -138,19 +137,19 @@ def render(values: dict) -> str:
     leader(sx(top[-1]), sy(top_y), lead_x, oy + 14.0)
     add(
         f"    #place(dx: {_f(label_x)}pt, dy: {_f(oy + 9)}pt, "
-        f"text(size: 7pt)[{n_top_bars} No. {top_bar_size} hanger \\ bars])"
+        f'text(size: 7pt, "({n_top_bars}) #{top_bar_size}"))'
     )
 
     leader(sx(bw - inset), sy(h / 2.0), lead_x, oy + h_sec / 2.0 - 3.0)
     add(
         f"    #place(dx: {_f(label_x)}pt, dy: {_f(oy + h_sec / 2.0 - 8)}pt, "
-        f"text(size: 7pt)[No. {stirrup_size} stirrup \\ at {_f(stirrup_spacing)} in o.c.])"
+        f'text(size: 7pt, "#{stirrup_size} @ {_f(stirrup_spacing)}″"))'
     )
 
     leader(sx(bottom[-1]), sy(y_bottom), lead_x, oy + h_sec - 14.0)
     add(
         f"    #place(dx: {_f(label_x)}pt, dy: {_f(oy + h_sec - 19)}pt, "
-        f'text(size: 7pt)[{n_bars} No. {bar_size} bottom \\ $A_s = {_f(As)} " in"^2$])'
+        f'text(size: 7pt, "({n_bars}) #{bar_size}"))'
     )
 
     add("  ]")