新增家长注册页 /register:凭家庭邀请码注册加入并自动登录

src/app/login/page.tsx

@@ -65,6 +65,15 @@ export default function LoginPage() {
                 去输入激活码
               </Link>
             </p>
+            <p className="text-center text-sm text-muted-foreground">
+              家里另一位家长想加入?{" "}
+              <Link
+                href="/register"
+                className="font-semibold text-indigo-600 underline-offset-4 hover:underline"
+              >
+                用邀请码加入家庭
+              </Link>
+            </p>
           </form>
         </CardContent>
       </Card>

src/app/register/actions.ts

@@ -0,0 +1,68 @@
+"use server";
+
+import crypto from "node:crypto";
+import bcrypt from "bcryptjs";
+import { and, eq, gt, isNull } from "drizzle-orm";
+import { redirect } from "next/navigation";
+import { z } from "zod";
+import { db } from "@/db";
+import { familyInvites, users } from "@/db/schema";
+import { createSession } from "@/lib/auth";
+
+function hashCode(code: string) {
+  return crypto.createHash("sha256").update(code).digest("hex");
+}
+
+const registerSchema = z.object({
+  displayName: z.string().trim().min(1, "请输入称呼").max(20, "称呼最多 20 字"),
+  phone: z.string().regex(/^1\d{10}$/, "请输入 11 位手机号"),
+  password: z.string().min(6, "密码至少 6 位"),
+  code: z.string().regex(/^\d{6}$/, "邀请码是 6 位数字"),
+});
+
+export type RegisterState = { error?: string } | null;
+
+// xuchao: 家长凭邀请码注册:校验码→查重手机号→事务(码标记已用+建家长)→自动登录跳家长中心
+export async function registerWithInvite(
+  _prev: RegisterState,
+  formData: FormData,
+): Promise<RegisterState> {
+  const parsed = registerSchema.safeParse({
+    displayName: formData.get("displayName"),
+    phone: formData.get("phone"),
+    password: formData.get("password"),
+    code: formData.get("code"),
+  });
+  if (!parsed.success) return { error: parsed.error.issues[0].message };
+
+  const { displayName, phone, password, code } = parsed.data;
+
+  const [invite] = await db
+    .select({ id: familyInvites.id, familyId: familyInvites.familyId })
+    .from(familyInvites)
+    .where(
+      and(
+        eq(familyInvites.codeHash, hashCode(code)),
+        isNull(familyInvites.usedAt),
+        gt(familyInvites.expiresAt, new Date()),
+      ),
+    )
+    .limit(1);
+  if (!invite) return { error: "邀请码无效或已过期,请让家长重新生成" };
+
+  const [dup] = await db.select({ id: users.id }).from(users).where(eq(users.phone, phone)).limit(1);
+  if (dup) return { error: "该手机号已注册" };
+
+  const passwordHash = await bcrypt.hash(password, 10);
+  const newUserId = await db.transaction(async (tx) => {
+    await tx.update(familyInvites).set({ usedAt: new Date() }).where(eq(familyInvites.id, invite.id));
+    const [created] = await tx
+      .insert(users)
+      .values({ familyId: invite.familyId, role: "parent", displayName, phone, passwordHash })
+      .$returningId();
+    return created.id;
+  });
+
+  await createSession(newUserId, "家长设备", 30);
+  redirect("/parent");
+}

src/app/register/page.tsx

@@ -0,0 +1,83 @@
+"use client";
+
+import { useActionState } from "react";
+import Link from "next/link";
+import { UserPlus } from "lucide-react";
+import { BackgroundBlobs } from "@/components/background-blobs";
+import { registerWithInvite } from "./actions";
+import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardHeader } from "@/components/ui/card";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+
+export default function RegisterPage() {
+  const [state, formAction, pending] = useActionState(registerWithInvite, null);
+
+  return (
+    <main className="relative flex min-h-dvh items-center justify-center p-4">
+      <BackgroundBlobs />
+      <Card className="w-full max-w-sm border-slate-100 shadow-soft transition-shadow duration-200 hover:shadow-lift">
+        <CardHeader className="items-center gap-3 text-center">
+          <div className="flex size-14 items-center justify-center rounded-xl bg-gradient-to-br from-emerald-500 to-teal-600 shadow-btn">
+            <UserPlus className="size-8 text-white" />
+          </div>
+          <h1 className="text-2xl font-extrabold tracking-tight">加入家庭</h1>
+          <p className="text-sm text-muted-foreground">需要家里已有成员的邀请码</p>
+        </CardHeader>
+        <CardContent>
+          <form action={formAction} className="space-y-4">
+            <div className="space-y-2">
+              <Label htmlFor="displayName">称呼</Label>
+              <Input id="displayName" name="displayName" placeholder="如:妈妈" required />
+            </div>
+            <div className="space-y-2">
+              <Label htmlFor="phone">手机号</Label>
+              <Input
+                id="phone"
+                name="phone"
+                type="tel"
+                inputMode="numeric"
+                autoComplete="username"
+                placeholder="11 位手机号"
+                required
+              />
+            </div>
+            <div className="space-y-2">
+              <Label htmlFor="password">密码</Label>
+              <Input
+                id="password"
+                name="password"
+                type="password"
+                autoComplete="new-password"
+                placeholder="至少 6 位"
+                required
+              />
+            </div>
+            <div className="space-y-2">
+              <Label htmlFor="code">邀请码</Label>
+              <Input
+                id="code"
+                name="code"
+                inputMode="numeric"
+                maxLength={6}
+                placeholder="6 位数字"
+                className="font-mono tracking-widest"
+                required
+              />
+            </div>
+            {state?.error && <p className="text-sm font-medium text-destructive">{state.error}</p>}
+            <Button type="submit" className="w-full" size="lg" disabled={pending}>
+              {pending ? "注册中…" : "注册并加入家庭"}
+            </Button>
+            <p className="text-center text-sm text-muted-foreground">
+              已有账号?{" "}
+              <Link href="/login" className="font-semibold text-indigo-600 underline-offset-4 hover:underline">
+                去登录
+              </Link>
+            </p>
+          </form>
+        </CardContent>
+      </Card>
+    </main>
+  );
+}