feat: redesign auth layout and login view with ProsApp logo

- auth_layout: gradient header (mobile) / split panel (desktop)
- background_auth: gradient blue with network logo, tagline and feature list
- custom_title: network logo replacing local asset
- login_view: consistent UI matching phone_login_view (inputs, buttons,
  links to register/phone login, brand colors)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/ui/layouts/auth/widgets/custom_title.dart

@@ -1,38 +1,29 @@
 import 'package:flutter/material.dart';
-import 'package:google_fonts/google_fonts.dart';
 
 class CustomTitle extends StatelessWidget {
-  const CustomTitle({
-    super.key,
-  });
+  const CustomTitle({super.key});
 
   @override
   Widget build(BuildContext context) {
-    return Container(
-      padding: const EdgeInsets.symmetric(horizontal: 20),
-      child: Column(
-        crossAxisAlignment: CrossAxisAlignment.center,
-        children: [
-          const SizedBox(height: 100), // Añade espacio arriba
-          Image.asset(
-            'logo.png',
-            width: 60,
-            height: 60,
+    return Column(
+      children: [
+        const SizedBox(height: 40),
+        Image.network(
+          'https://prosapp.co/img/logo_prosapp.png',
+          height: 52,
+          fit: BoxFit.contain,
+          errorBuilder: (_, __, ___) => const Text(
+            'ProsApp',
+            style: TextStyle(fontSize: 28, fontWeight: FontWeight.bold, color: Color(0xFF42A4EF)),
           ),
-          const SizedBox(height: 40), // Mantiene el espacio entre el logo y el texto
-          FittedBox(
-            fit: BoxFit.contain,
-            child: Text(
-              "Iniciar sesión",
-              style: GoogleFonts.montserratAlternates(
-                fontSize: 30,
-                color: Colors.black,
-                fontWeight: FontWeight.bold,
-              ),
-            ),
-          )
-        ],
-      ),
+        ),
+        const SizedBox(height: 8),
+        const Text(
+          'Conecta con los mejores profesionales',
+          style: TextStyle(color: Colors.grey, fontSize: 13),
+        ),
+        const SizedBox(height: 32),
+      ],
     );
   }
 }