feat(piece) : add quantity display and input to composant edit page

app/shared/utils/structureSelectionUtils.ts

@@ -3,6 +3,8 @@ export type SelectionEntry = {
   path: string
   requirementLabel: string
   resolvedName: string
+  quantity?: number
+  _definition?: Record<string, any>
 }
 
 export type StructureSelectionResult = {
@@ -59,6 +61,8 @@ export function collectStructureSelections(
         path: isNonEmptyString(entry?.path) ? entry.path : `${nodePath}:piece-${index + 1}`,
         requirementLabel: resolvers.resolvePieceLabel(definition),
         resolvedName: catalogPiece?.name || selectedId,
+        quantity: typeof definition?.quantity === 'number' ? definition.quantity : undefined,
+        _definition: definition,
       })
     })