Reduce SRAM/UCIe/M_CPU/HBM node sizes, thin HBM and mesh links

Shrink cube-view component nodes to avoid clutter.
HBM and router_mesh edge lines made thinner and more transparent.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/kernbench/topology/visualizer.py

@@ -62,7 +62,12 @@ _KIND_SIZE: dict[str, tuple[float, float]] = {
     "cube": (6.0, 4.0),
     "iochiplet": (4.0, 1.5),
     "switch": (5.0, 1.5),
-    "noc_router": (1.2, 0.8),
+    "noc_router": (1.0, 0.7),
+    "ucie_port": (1.2, 0.7),
+    "ucie_conn": (0.8, 0.5),
+    "sram": (1.4, 0.7),
+    "m_cpu": (1.4, 0.7),
+    "hbm_ctrl": (1.8, 0.8),
 }
 
 
@@ -274,6 +279,14 @@ def _draw_edge(
     color = _EDGE_COLORS.get(edge.kind, "#94a3b8")
     width = "1.5" if edge.kind == "pe_internal" else "1"
     opacity = "0.6" if edge.kind in ("command", "noc_to_ucie") else "0.8"
+    # HBM links: thin and faint to reduce clutter
+    if edge.kind in ("router_to_hbm", "hbm_to_router"):
+        width = "0.5"
+        opacity = "0.3"
+    # Router mesh links: thin
+    if edge.kind == "router_mesh":
+        width = "0.5"
+        opacity = "0.4"
 
     if edge.kind in _FANOUT_KINDS and view.name == "cube":
         # Orthogonal routing: src→horizontal→vertical→dst with per-edge offset.