refactor(web): alerts + deviceReadings API 迁移为对象风格导出

- alerts.ts: listAlerts → alertApi.list, acknowledgeAlert → alertApi.acknowledge 等
- deviceReadings.ts: batchCreateReadings → deviceReadingApi.batchCreate 等
- AlertList/AlertRuleList 引用处同步更新
- 其余 19 个函数式 API 文件记为待迁移（旧文件不强制迁移）

apps/web/src/pages/health/AlertRuleList.tsx

@@ -3,10 +3,7 @@ import { Button, Form, Input, InputNumber, message, Modal, Select, Space, Switch
 import type { ColumnsType } from 'antd/es/table';
 
 import {
-  createAlertRule,
-  deactivateAlertRule,
-  listAlertRules,
-  updateAlertRule,
+  alertRuleApi,
   type AlertRule,
   type CreateAlertRuleReq,
   type UpdateAlertRuleReq,
@@ -53,7 +50,7 @@ export default function AlertRuleList() {
   const fetchRules = useCallback(async () => {
     setLoading(true);
     try {
-      const res = await listAlertRules({ page, page_size: 20 });
+      const res = await alertRuleApi.list({ page, page_size: 20 });
       setData(res.data);
       setTotal(res.total);
     } catch {
@@ -105,7 +102,7 @@ export default function AlertRuleList() {
           cooldown_minutes: values.cooldown_minutes,
           version: editingRule.version,
         };
-        await updateAlertRule(editingRule.id, req);
+        await alertRuleApi.update(editingRule.id, req);
         message.success('规则已更新');
       } else {
         const req: CreateAlertRuleReq = {
@@ -117,7 +114,7 @@ export default function AlertRuleList() {
           severity: values.severity,
           cooldown_minutes: values.cooldown_minutes,
         };
-        await createAlertRule(req);
+        await alertRuleApi.create(req);
         message.success('规则已创建');
       }
       setModalOpen(false);
@@ -132,7 +129,7 @@ export default function AlertRuleList() {
   const handleToggle = async (rule: AlertRule, active: boolean) => {
     try {
       if (!active) {
-        await deactivateAlertRule(rule.id, rule.version);
+        await alertRuleApi.deactivate(rule.id, rule.version);
         message.success('规则已禁用');
       }
       fetchRules();