refactor: extract scrap to top-level menu and rebuild create UI using immersive scanner layout

inventory-web/src/router/index.ts

@@ -148,7 +148,7 @@ const routes: Array<RouteRecordRaw> = [
         ]
     },
 
-    // 6. 业务操作
+    // 6. 借库管理
     {
         path: '/operation',
         component: Layout,
@@ -172,18 +172,27 @@ const routes: Array<RouteRecordRaw> = [
                 name: 'OpRecords',
                 component: () => import('@/views/transaction/records.vue'),
                 meta: { title: '借还记录' }
-            },
-            // ★ [新增] 报废管理
+            }
+        ]
+    },
+
+    // 6.1 报废管理 (独立一级菜单)
+    {
+        path: '/scrap',
+        component: Layout,
+        meta: { title: '报废管理', icon: 'Delete' },
+        redirect: '/scrap/index',
+        children: [
             {
-                path: 'scrap/index',
+                path: 'index',
                 name: 'ScrapList',
-                component: () => import('@/views/operation/scrap/index.vue'), // ✅ 正确路径
+                component: () => import('@/views/operation/scrap/index.vue'),
                 meta: { title: '报废记录' }
             },
             {
-                path: 'scrap/create',
+                path: 'create',
                 name: 'ScrapCreate',
-                component: () => import('@/views/operation/scrap/create.vue'), // ✅ 正确路径
+                component: () => import('@/views/operation/scrap/create.vue'),
                 meta: { title: '新建报废' }
             }
         ]