refactor: integrate software assets into unified schema and optimize backend API

src/views/List/SwListView.ts

@@ -95,8 +95,7 @@ export function renderSwList(container: HTMLElement) {
     }
 
     filtered.forEach((asset, idx) => {
-      const mapping = state.masterData.swUsers.find(u => u.sw_id === asset.id);
-      const assigned = mapping ? (mapping.userData || []).length : 0;
+      const assigned = state.masterData.swUsers.filter(u => u.sw_id === asset.id).length;
       const qty = typeof asset.수량 === 'number' ? asset.수량 : parseInt(asset.수량||'0', 10);
       const avail = qty - assigned;