refactor: address code review issues — remove stale import, fix misleading var name, eliminate redundant adjacency build, add warning log on pin-angle failure

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

python/commands/connection_schematic.py

@@ -98,7 +98,10 @@ class ConnectionManager:
             # Stub direction follows the pin's outward angle from the PinLocator
             try:
                 pin_angle_deg = locator.get_pin_angle(schematic_path, component_ref, pin_name) or 0
-            except Exception:
+            except Exception as e:
+                logger.warning(
+                    f"Could not get pin angle for {component_ref}/{pin_name}, defaulting to 0: {e}"
+                )
                 pin_angle_deg = 0
             import math as _math
 

python/commands/wire_connectivity.py

@@ -414,10 +414,10 @@ def list_floating_labels(schematic: Any, schematic_path: str) -> List[Dict[str,
             coords = label.at.value
             lx_mm = float(coords[0])
             ly_mm = float(coords[1])
-            lx_iu = _to_iu(lx_mm, ly_mm)
+            label_iu = _to_iu(lx_mm, ly_mm)
 
             # Check if the label anchor itself is a pin position
-            if lx_iu in pin_iu_set:
+            if label_iu in pin_iu_set:
                 continue
 
             # Trace the wire-network from this label and check for pins
@@ -470,10 +470,9 @@ def get_net_at_point(
     # Check if query point is on a wire endpoint
     all_wires = _parse_wires(schematic) if hasattr(schematic, "wire") else []
     if all_wires:
-        _, iu_to_wires = _build_adjacency(all_wires)
+        adjacency, iu_to_wires = _build_adjacency(all_wires)
         if query_iu in iu_to_wires:
             # Found a wire endpoint — trace the net to get the name
-            adjacency, _ = _build_adjacency(all_wires)
             visited, net_points = _find_connected_wires(
                 x_mm,
                 y_mm,