feat(web): integrate session management and improve API error handling

apps/web/app/setup/page.tsx

@@ -4,8 +4,7 @@ import { useState } from "react";
 import { useRouter } from "next/navigation";
 import { Alert, Button, Card, CloseButton, Input, Label, TextField } from "@heroui/react";
 import { Thunderbolt } from "@gravity-ui/icons";
-
-const CSMS_URL = process.env.NEXT_PUBLIC_CSMS_URL ?? "http://localhost:3001";
+import { api } from "@/lib/api";
 
 export default function SetupPage() {
   const router = useRouter();
@@ -38,28 +37,15 @@ export default function SetupPage() {
 
     setLoading(true);
     try {
-      const res = await fetch(`${CSMS_URL}/api/setup`, {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        credentials: "include",
-        body: JSON.stringify({
-          name: form.name,
-          email: form.email,
-          username: form.username,
-          password: form.password,
-        }),
+      await api.setup.create({
+        name: form.name,
+        email: form.email,
+        username: form.username,
+        password: form.password,
       });
-
-      if (!res.ok) {
-        const data = await res.json().catch(() => ({}));
-        setError((data as { error?: string }).error ?? "初始化失败，请重试");
-        return;
-      }
-
-      // 初始化成功，跳转登录页
       router.push("/login?setup=1");
-    } catch {
-      setError("网络错误，请稍后重试");
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "初始化失败，请重试");
     } finally {
       setLoading(false);
     }
@@ -74,7 +60,7 @@ export default function SetupPage() {
         </div>
         <div className="text-center">
           <h1 className="text-2xl font-bold tracking-tight text-foreground">Helios EVCS</h1>
-          <p className="mt-1 text-sm text-muted">首次启动 · 创建根管理员账号</p>
+          <p className="mt-1 text-sm text-muted">首次启动 · 创建管理员账号</p>
         </div>
       </div>