Feat: Add complete auth system (Login, Register, OTP/2FA via Telegram, Session management)

app/api/auth/register/route.ts

@@ -0,0 +1,41 @@
+import { NextResponse } from 'next/server';
+import { saveUser, findUser, hashPassword, createSession } from '@/lib/auth';
+import { randomUUID } from 'crypto';
+
+export async function POST(req: Request) {
+  try {
+    const { username, password, chatId } = await req.json();
+
+    if (!username || !password || !chatId) {
+      return NextResponse.json({ error: 'Faltan datos requeridos' }, { status: 400 });
+    }
+
+    if (findUser(username)) {
+      return NextResponse.json({ error: 'El usuario ya existe' }, { status: 409 });
+    }
+
+    // Hash password
+    const passwordHash = await hashPassword(password);
+    
+    // Get IP
+    const ip = req.headers.get('x-forwarded-for') || '127.0.0.1';
+
+    const newUser = {
+      id: randomUUID(),
+      username,
+      passwordHash,
+      chatId,
+      knownIps: [ip] // Register current IP as known initially
+    };
+
+    saveUser(newUser);
+
+    // Auto login after register
+    await createSession(newUser);
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error('Register error:', error);
+    return NextResponse.json({ error: 'Error interno del servidor' }, { status: 500 });
+  }
+}