fix(c2): 排班派单页 staff pageSize 500→200（对齐后端 @Max(200)）

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/pages/ltc/schedule/index.vue

@@ -251,7 +251,7 @@ function computeConflicts(): void {
 }
 
 async function loadStaff(): Promise<void> {
-  const result = await listStaff({ page: 1, pageSize: 500 })
+  const result = await listStaff({ page: 1, pageSize: 200 })
   staffList.value = result.list
   staffNameMap.value = new Map(result.list.map((s) => [s.id, s.name]))
 }