Show Action on finding cards and inject PCB geometry into AI context.

Layout and AI findings always get action (fallback recommendation). The card
renders that sentence in the body. PCB review context now includes vias under
the footprint, copper thickness, nearby widths, courtyard, and keepout polygons.

backend/periscopex/validate.py

@@ -924,6 +924,8 @@ def _parse_review(
                     why = (
                         "Unverified: no verbatim datasheet quote. " + why
                     ).strip()
+            rec = str(item.get("recommendation") or item.get("action") or "").strip()
+            act = str(item.get("action") or rec).strip()
             findings.append(Finding(
                 designator=ic_ref,
                 mpn=mpn,
@@ -936,8 +938,8 @@ def _parse_review(
                 status=status,
                 source_page=page,
                 source_quote=item.get("source_quote", ""),
-                recommendation=item.get("recommendation", ""),
-                action=str(item.get("recommendation") or ""),
+                recommendation=rec,
+                action=act,
                 reference=f"{src_mpn} datasheet p.{page if page is not None else '?'}",
                 source="review",
                 finding_class="REVIEW",