feat: add Issues column to Pricing view showing unit/weight errors per row

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

src/components/PricingView.tsx

@@ -1057,6 +1057,10 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                   );
                 })}
 
+                <th style={{ width: 180 }} className="text-left px-3 py-3 text-xs font-semibold text-red-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap relative">
+                  Issues
+                </th>
+
                 <th style={{ width: columnWidths.check }} className="text-left px-3 py-3 text-xs font-semibold text-blue-400 uppercase tracking-wider group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort(COLUMNS.VALIDATED_CHECK)}>
                   <span className="flex items-center gap-1">Check <SortIcon current={sortConfig.key === COLUMNS.VALIDATED_CHECK ? sortConfig.direction : null} /></span>
                   <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'check', columnWidths.check); }} />
@@ -1240,6 +1244,21 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                       </td>
                     ))}
 
+                    {/* Issues column */}
+                    <td className="px-3 py-2 overflow-hidden">
+                      {unitErrors.length > 0 ? (
+                        <div className="flex flex-col gap-1">
+                          {unitErrors.map((err, i) => (
+                            <span key={i} className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded text-[10px] font-semibold bg-red-500/15 text-red-400 border border-red-500/30 whitespace-nowrap">
+                              <AlertCircle className="w-3 h-3 shrink-0" />{err}
+                            </span>
+                          ))}
+                        </div>
+                      ) : (
+                        <span className="text-slate-600 text-xs">—</span>
+                      )}
+                    </td>
+
                     {/* Check Column (Validated + Note) */}
                     <td className="px-3 py-2.5">
                       <div className="flex items-center gap-2">