Treat KiCad /net vs schematic net as one hierarchy finding.

Pad-net compare strips leading slash and nested sheet path so /ESP32_EN
matches ESP32_EN. If every mismatch is only that prefix, emit PE-LAY-003
once instead of per-pad reconnect errors.

backend/periscopex/placement_check.py

@@ -23,6 +23,7 @@ from backend.periscopex.models import (
     LayoutGraph,
     LayoutPad,
 )
+from backend.periscopex.pcb_net_match import kicad_nets_match
 from backend.periscopex.validate import _match_constraints
 
 
@@ -146,7 +147,7 @@ def _decoupling_finding(ref, comp, cons, rule, graph: DesignGraph, layout: Layou
         if not fp:
             continue
         for pad in fp.pads:
-            if pad.net == net or pad.net == ic_pad.net:
+            if kicad_nets_match(pad.net, net) or kicad_nets_match(pad.net, ic_pad.net):
                 cap_pads.append(pad)
     if not cap_pads:
         return []
@@ -215,7 +216,7 @@ def _same_layer_finding(ref, comp, cons, rule, graph: DesignGraph, layout: Layou
         return []
     if len(ic_fp.courtyard) >= 3:
         for v in layout.vias:
-            if v.net and v.net != net:
+            if v.net and not kicad_nets_match(v.net, net):
                 continue
             if _in_poly(v.x, v.y, ic_fp.courtyard):
                 return []