fix: logo not showing and duplicate ProsApp text in auth layout

- Put logo inside white container on gradient so colors are correct
- Remove BlendMode.srcATop which was making logo invisible on gradient
- Simplify auth_layout mobile/desktop branches

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

lib/ui/layouts/auth/auth_layout.dart

@@ -7,9 +7,9 @@ class AuthLayout extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final size = MediaQuery.of(context).size;
+    final width = MediaQuery.of(context).size.width;
     return Scaffold(
-      body: size.width > 900
+      body: width > 900
           ? _DesktopBody(child: child)
           : _MobileBody(child: child),
     );
@@ -24,10 +24,9 @@ class _MobileBody extends StatelessWidget {
   Widget build(BuildContext context) {
     return Column(
       children: [
-        // Gradient header with logo
         Container(
           width: double.infinity,
-          padding: const EdgeInsets.symmetric(vertical: 36),
+          padding: const EdgeInsets.symmetric(vertical: 28),
           decoration: const BoxDecoration(
             gradient: LinearGradient(
               begin: Alignment.topCenter,
@@ -35,26 +34,32 @@ class _MobileBody extends StatelessWidget {
               colors: [Color(0xFF42A4EF), Color(0xFF1565C0)],
             ),
             borderRadius: BorderRadius.only(
-              bottomLeft: Radius.circular(32),
-              bottomRight: Radius.circular(32),
+              bottomLeft: Radius.circular(28),
+              bottomRight: Radius.circular(28),
             ),
           ),
           child: Column(
             children: [
-              Image.network(
-                'https://prosapp.co/img/logo_prosapp.png',
-                height: 52,
-                color: Colors.white,
-                colorBlendMode: BlendMode.srcATop,
-                errorBuilder: (_, __, ___) => const Text(
-                  'ProsApp',
-                  style: TextStyle(fontSize: 28, fontWeight: FontWeight.bold, color: Colors.white),
+              Container(
+                padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
+                decoration: BoxDecoration(
+                  color: Colors.white,
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                child: Image.network(
+                  'https://prosapp.co/img/logo_prosapp.png',
+                  height: 36,
+                  fit: BoxFit.contain,
+                  errorBuilder: (_, __, ___) => const Text(
+                    'ProsApp',
+                    style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold, color: Color(0xFF42A4EF)),
+                  ),
                 ),
               ),
               const SizedBox(height: 8),
               const Text(
                 'Conecta con los mejores profesionales',
-                style: TextStyle(color: Colors.white70, fontSize: 13),
+                style: TextStyle(color: Colors.white70, fontSize: 12),
               ),
             ],
           ),
@@ -71,15 +76,13 @@ class _DesktopBody extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final size = MediaQuery.of(context).size;
+    final height = MediaQuery.of(context).size.height;
     return Row(
       children: [
-        // Left gradient panel
         const SizedBox(width: 420, child: BackgroundAuth()),
-        // Right form panel
         Expanded(
           child: Container(
-            height: size.height,
+            height: height,
             color: Colors.white,
             child: Center(child: child),
           ),

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

@@ -16,14 +16,20 @@ class BackgroundAuth extends StatelessWidget {
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: [
-          Image.network(
-            'https://prosapp.co/img/logo_prosapp.png',
-            width: 180,
-            color: Colors.white,
-            colorBlendMode: BlendMode.srcATop,
-            errorBuilder: (_, __, ___) => const Text(
-              'ProsApp',
-              style: TextStyle(fontSize: 36, fontWeight: FontWeight.bold, color: Colors.white),
+          Container(
+            padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 14),
+            decoration: BoxDecoration(
+              color: Colors.white,
+              borderRadius: BorderRadius.circular(16),
+            ),
+            child: Image.network(
+              'https://prosapp.co/img/logo_prosapp.png',
+              height: 48,
+              fit: BoxFit.contain,
+              errorBuilder: (_, __, ___) => const Text(
+                'ProsApp',
+                style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold, color: Color(0xFF42A4EF)),
+              ),
             ),
           ),
           const SizedBox(height: 24),