fix(admin): 修正接口 schema 与路由不匹配

- classroomSchema 允许 building/status 为 null，教室查看页恢复数据
- 排期 matrix 单元格为对象而非数组，教室排期页恢复渲染
- 押金批量收取改用 /deposits/eligible-students 路由
- 学生下拉 schema 按 /deposits/student-lookups 实际结构校验
- 水电费录入改走 /expenses/student-utility，批量恢复改为 PUT

apps/admin/src/pages/Expenses/index.tsx

@@ -132,7 +132,7 @@ const ExpensesPage: React.FC = () => {
       { invalidate: [['expenses']] },
     ),
     utility: useApiMutation(
-      async (payload: Record<string, unknown>) => api.post('/expenses/utility', payload),
+      async (payload: Record<string, unknown>) => api.post('/expenses/student-utility', payload),
       { invalidate: [['expenses'], ['bills']] },
     ),
     importUtility: useApiMutation(
@@ -166,11 +166,11 @@ const ExpensesPage: React.FC = () => {
       { invalidate: [['expenses']] },
     ),
     batchRestoreRoom: useApiMutation(
-      async (ids: number[]) => api.post('/expenses/room/batch-restore', { ids }),
+      async (ids: number[]) => api.put('/expenses/room/batch-restore', { ids }),
       { invalidate: [['expenses']] },
     ),
     batchRestorePersonal: useApiMutation(
-      async (ids: number[]) => api.post('/expenses/personal/batch-restore', { ids }),
+      async (ids: number[]) => api.put('/expenses/personal/batch-restore', { ids }),
       { invalidate: [['expenses']] },
     ),
     purgeRoom: useApiMutation(