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/api/schemas/core.ts

@@ -153,8 +153,8 @@ export const classroomSchema = z
   .object({
     id: z.number(),
     name: z.string(),
-    building: z.string().optional(),
+    building: z.string().nullable().optional(),
-    status: z.string().optional(),
+    status: z.string().nullable().optional(),
   })
   .passthrough();
 
@@ -180,7 +180,11 @@ export const depositSchema = z
 export const depositsSchema = z.array(depositSchema);
 
 export const depositStudentLookupSchema = z
-  .object({ studentId: z.number(), name: z.string().nullable().optional() })
+  .object({
+    id: z.number(),
+    name: z.string().nullable().optional(),
+    studentNo: z.string().nullable().optional(),
+  })
   .passthrough();
 
 export const depositStudentLookupsSchema = z.array(depositStudentLookupSchema);

apps/admin/src/api/schemas/dashboard.ts

@@ -4,7 +4,8 @@ export const classroomScheduleSchema = z
   .object({
     classrooms: z.array(z.record(z.string(), z.unknown())),
     organizations: z.array(z.record(z.string(), z.unknown())),
-    matrix: z.record(z.string(), z.record(z.string(), z.array(z.record(z.string(), z.unknown())))),
+    // matrix: 教室 id → 日期 → 单条排课/租赁记录（对象，非数组）
+    matrix: z.record(z.string(), z.record(z.string(), z.record(z.string(), z.unknown()))),
     summary: z.record(z.string(), z.record(z.string(), z.unknown())),
     days: z.number().optional(),
   })

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

@@ -97,7 +97,11 @@ const DepositsPage: React.FC = () => {
     { invalidate: [['deposits']] },
   );
   const payInstallmentMutation = useApiMutation(
-    async (installmentId: number) => api.post(`/deposits/installments/${installmentId}/pay`),
+    async (installmentId: number) =>
+      api.put(`/deposits/installments/${installmentId}`, {
+        status: 'paid',
+        paidDate: dayjs().format('YYYY-MM-DD'),
+      }),
     { invalidate: [['deposits']] },
   );
   const saveInstallmentCellMutation = useApiMutation(
@@ -135,7 +139,7 @@ const DepositsPage: React.FC = () => {
       if (eligibleRoomType) params.roomType = eligibleRoomType;
       return validateResponse<EligibleStudent[]>(
         eligibleStudentsSchema,
-        await api.get('/deposits/eligible', { params }),
+        await api.get('/deposits/eligible-students', { params }),
       );
     },
   });

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(