feat(01-01): configure Auth.js v5 JWT + Credentials, route protection middleware

- Created src/lib/auth.ts with NextAuth JWT strategy, 7-day rolling session, Credentials provider
- Created src/app/api/auth/[...nextauth]/route.ts with GET/POST handlers and force-dynamic
- Created middleware.ts at project root (not src/) protecting /agent/* routes
- Fixed db/index.ts: lazy Proxy singleton prevents neon() crash during Next.js build
- npm run build passes; /api/auth/[...nextauth] renders as Dynamic route

teressa-copeland-homes/middleware.ts

@@ -0,0 +1,25 @@
+import { auth } from "@/lib/auth";
+import { NextResponse } from "next/server";
+
+export default auth((req) => {
+  const isLoggedIn = !!req.auth;
+  const isAgentRoute = req.nextUrl.pathname.startsWith("/agent");
+  const isLoginPage = req.nextUrl.pathname === "/agent/login";
+
+  // Protect all /agent/* routes except the login page itself
+  if (isAgentRoute && !isLoginPage && !isLoggedIn) {
+    return NextResponse.redirect(new URL("/agent/login", req.nextUrl.origin));
+  }
+
+  // Redirect already-authenticated users away from the login page
+  if (isLoginPage && isLoggedIn) {
+    return NextResponse.redirect(new URL("/agent/dashboard", req.nextUrl.origin));
+  }
+});
+
+export const config = {
+  matcher: [
+    // Run on /agent/* routes, excluding Next.js internals and static files
+    "/((?!_next/static|_next/image|favicon.ico).*)",
+  ],
+};

teressa-copeland-homes/src/app/api/auth/[...nextauth]/route.ts

@@ -0,0 +1,5 @@
+import { handlers } from "@/lib/auth";
+
+export const dynamic = "force-dynamic";
+
+export const { GET, POST } = handlers;

teressa-copeland-homes/src/lib/auth.ts

@@ -0,0 +1,57 @@
+import NextAuth from "next-auth";
+import Credentials from "next-auth/providers/credentials";
+import { db } from "@/lib/db";
+import { users } from "@/lib/db/schema";
+import { eq } from "drizzle-orm";
+import bcrypt from "bcryptjs";
+import { z } from "zod";
+
+const loginSchema = z.object({
+  email: z.string().email(),
+  password: z.string().min(1),
+});
+
+export const { handlers, auth, signIn, signOut } = NextAuth({
+  session: {
+    strategy: "jwt",
+    maxAge: 7 * 24 * 60 * 60, // 7 days — rolling session per user decision
+    updateAge: 24 * 60 * 60, // Refresh cookie once per day (not every request)
+  },
+  pages: {
+    signIn: "/agent/login", // Custom login page — per user decision
+  },
+  providers: [
+    Credentials({
+      async authorize(credentials) {
+        const parsed = loginSchema.safeParse(credentials);
+        if (!parsed.success) return null;
+
+        const [user] = await db
+          .select()
+          .from(users)
+          .where(eq(users.email, parsed.data.email))
+          .limit(1);
+
+        if (!user) return null;
+
+        const passwordMatch = await bcrypt.compare(
+          parsed.data.password,
+          user.passwordHash
+        );
+        if (!passwordMatch) return null;
+
+        return { id: user.id, email: user.email };
+      },
+    }),
+  ],
+  callbacks: {
+    jwt({ token, user }) {
+      if (user) token.id = user.id;
+      return token;
+    },
+    session({ session, token }) {
+      session.user.id = token.id as string;
+      return session;
+    },
+  },
+});

teressa-copeland-homes/src/lib/db/index.ts

@@ -2,5 +2,23 @@ import { drizzle } from "drizzle-orm/neon-http";
 import { neon } from "@neondatabase/serverless";
 import * as schema from "./schema";
 
-const sql = neon(process.env.DATABASE_URL!);
-export const db = drizzle({ client: sql, schema });
+type DrizzleDb = ReturnType<typeof createDb>;
+
+function createDb() {
+  const url = process.env.DATABASE_URL;
+  if (!url) {
+    throw new Error("DATABASE_URL environment variable is not set");
+  }
+  const sql = neon(url);
+  return drizzle({ client: sql, schema });
+}
+
+// Lazy singleton — created on first use, not at module load time
+let _db: DrizzleDb | undefined;
+
+export const db = new Proxy({} as DrizzleDb, {
+  get(_target, prop: string | symbol) {
+    if (!_db) _db = createDb();
+    return (_db as unknown as Record<string | symbol, unknown>)[prop];
+  },
+});