Checkpoint: Initial stable CheckFlow base before i18n and demo mode

src/app/api/auth/register/route.ts

@@ -0,0 +1,49 @@
+import { NextRequest, NextResponse } from "next/server";
+import { prisma } from "@/lib/prisma";
+import bcrypt from "bcryptjs";
+
+export async function POST(req: NextRequest) {
+  try {
+    const body = await req.json().catch(() => null);
+    if (!body) {
+      return NextResponse.json({ error: "Invalid request body" }, { status: 400 });
+    }
+    const { name, email, password } = body;
+
+    if (!name || !email || !password) {
+      return NextResponse.json({ error: "All fields required" }, { status: 400 });
+    }
+    if (password.length < 8) {
+      return NextResponse.json({ error: "Password must be at least 8 characters" }, { status: 400 });
+    }
+
+    const existing = await prisma.user.findUnique({ where: { email } });
+    if (existing) {
+      return NextResponse.json({ error: "Email already in use" }, { status: 409 });
+    }
+
+    const passwordHash = await bcrypt.hash(password, 12);
+    const user = await prisma.user.create({
+      data: { name, email, passwordHash },
+    });
+
+    // Create default list
+    await prisma.list.create({
+      data: {
+        userId: user.id,
+        name: "My Tasks",
+        color: "#4B7BF5",
+        icon: "inbox",
+        sortOrder: 0,
+      },
+    });
+
+    return NextResponse.json({ id: user.id, email: user.email, name: user.name }, { status: 201 });
+  } catch (err) {
+    console.error("[register]", err);
+    return NextResponse.json(
+      { error: "Server error. Make sure the database is running." },
+      { status: 500 }
+    );
+  }
+}