feat: Enhance registration process with improved validation and error handling

app/api/auth/register/route.ts

@@ -1,25 +1,28 @@
+import { NextResponse } from "next/server"
 import { register } from "@/lib/auth"
-import { authSchema } from "@/lib/validation"
-import { ZodError } from "zod"
+import { authSchema, AuthSchema } from "@/lib/validation"
 
 export const runtime = "edge"
 
 export async function POST(request: Request) {
   try {
-    const json = await request.json()
-    const body = authSchema.parse(json)
-
-    await register(body.username, body.password)
-    return Response.json({ success: true })
-  } catch (error) {
-    if (error instanceof ZodError) {
-      return Response.json(
-        { error: error.errors[0].message },
+    const json = await request.json() as AuthSchema
+    
+    try {
+      authSchema.parse(json)
+    } catch (error) {
+      return NextResponse.json(
+        { error: error instanceof Error ? error.message : "输入格式不正确" },
         { status: 400 }
       )
     }
 
-    return Response.json(
+    const { username, password } = json
+    const user = await register(username, password)
+
+    return NextResponse.json({ user })
+  } catch (error) {
+    return NextResponse.json(
       { error: error instanceof Error ? error.message : "注册失败" },
       { status: 500 }
     )