Bump VLAN text sizes -- previous export was illegible in the PNG

Connector VLAN tags were 7.5px on a ~4000x9400px page -- effectively
invisible unless zoomed in hard inside draw.io itself. Bumped:
- connector labels: 7.5px -> 13px, bold, darker color
- VLAN table: title 11->15px, header 9->12px, rows 9->12px (row/header
  height grown to match, table height computed from the same constants
  so nothing clips)

Page height barely moved (4656 -> 4692px) since only the VLAN panel grew.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NM3nivbufxEWiKKmatEtEe

topology/generate_drawio.py

@@ -132,8 +132,8 @@ def place_section(depth_map, yslot_map, y_offset):
 
 TITLE_H = 60
 LEGEND_ROW_H = 34
-VLAN_ROW_H = 20
+VLAN_ROW_H = 26
-VLAN_HEADER_H = 24
+VLAN_HEADER_H = 30
 VLAN_TABLE_W = 900
 vlan_rows = max(1, len(vlans))  # the placeholder counts as one row
 VLAN_TABLE_H = VLAN_HEADER_H + vlan_rows * VLAN_ROW_H + 16
@@ -278,8 +278,8 @@ for idx, e in enumerate(edges):
         edge(f"e{idx}", f"n{a}", f"n{b}",
              "edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;strokeColor=#9AA6B8;strokeWidth=1.2;"
              "startArrow=none;endArrow=none;"
-             "jettySize=auto;orthogonalLoop=1;fontSize=7.5;fontColor=#7C8AA6;"
+             "jettySize=auto;orthogonalLoop=1;fontSize=13;fontStyle=1;fontColor=#3A4457;"
-             "labelBackgroundColor=#F7F8FBcc;align=center;verticalAlign=middle;",
+             "labelBackgroundColor=#F7F8FBee;align=center;verticalAlign=middle;",
              value=label)
 
 # legend
@@ -317,14 +317,14 @@ add_cell(
 )
 add_cell(
     f'<mxCell id="vt-title" value="VLANs" style="text;html=1;align=left;verticalAlign=middle;'
-    f'fontStyle=1;fontSize=11;fontColor=#33415C;" vertex="1" parent="1">'
+    f'fontStyle=1;fontSize=15;fontColor=#33415C;" vertex="1" parent="1">'
     f'<mxGeometry x="{vt_x+10}" y="{vt_y}" width="200" height="{VLAN_HEADER_H}" as="geometry"/></mxCell>'
 )
 cx = vt_x + 90
 for label, w in vt_cols:
     add_cell(
         f'<mxCell id="vt-h-{label}" value="{escape(label)}" style="text;html=1;align=left;'
-        f'verticalAlign=middle;fontStyle=1;fontSize=9;fontColor=#7C8AA6;" vertex="1" parent="1">'
+        f'verticalAlign=middle;fontStyle=1;fontSize=12;fontColor=#7C8AA6;" vertex="1" parent="1">'
         f'<mxGeometry x="{cx}" y="{vt_y}" width="{w}" height="{VLAN_HEADER_H}" as="geometry"/></mxCell>'
     )
     cx += w
@@ -340,7 +340,7 @@ if not vlans:
         f'<mxCell id="vt-empty-txt" value="No VLANs defined in NetBox yet (ipam.VLAN) — this table '
         f'and each connector’s VLAN tag fill in automatically once VLANs and interface assignments '
         f'are added, next time this diagram is regenerated." style="text;html=1;align=left;'
-        f'verticalAlign=middle;fontSize=9;fontColor=#7C8AA6;fontStyle=2;whiteSpace=wrap;" '
+        f'verticalAlign=middle;fontSize=12;fontColor=#7C8AA6;fontStyle=2;whiteSpace=wrap;" '
         f'vertex="1" parent="1"><mxGeometry x="{vt_x+90}" y="{row_y}" width="{VLAN_TABLE_W-100}" '
         f'height="{VLAN_ROW_H}" as="geometry"/></mxCell>'
     )
@@ -359,7 +359,7 @@ else:
         for (label, w), val in zip(vt_cols, row_vals):
             add_cell(
                 f'<mxCell id="vt-{v["vid"]}-{label}" value="{escape(val)}" style="text;html=1;align=left;'
-                f'verticalAlign=middle;fontSize=9;fontColor=#3A4457;" vertex="1" parent="1">'
+                f'verticalAlign=middle;fontSize=12;fontColor=#3A4457;" vertex="1" parent="1">'
                 f'<mxGeometry x="{cx}" y="{row_y}" width="{w}" height="{VLAN_ROW_H}" as="geometry"/></mxCell>'
             )
             cx += w