fix: corrige problema completo de :443 em OAuth redirect URLs

- Adiciona fix para Microsoft OAuth (mesmo que Google)
- Remove especificação explícita de porta 443 no HostString
- Resolve CORS errors causados por porta explícita nos redirect URIs

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/BCards.Web/Program.cs

@@ -351,9 +351,16 @@ authBuilder.AddGoogle(options =>
 
             var originalUri = context.RedirectUri;
 
+            // Fix para Cloudflare - remover porta 443 explícita (mesmo fix do Google)
+            if (!builder.Environment.IsDevelopment())
+            {
+                context.RedirectUri = originalUri.Replace(":443", "");
+                logger.LogWarning($"REMOVED :443 - Modified RedirectUri: {context.RedirectUri}");
+            }
+
             if (originalUri.Contains("bcards.site"))
             {
-                context.RedirectUri = originalUri
+                context.RedirectUri = context.RedirectUri
                     .Replace("http://bcards.site", "https://bcards.site")
                     .Replace("http%3A%2F%2Fbcards.site", "https%3A%2F%2Fbcards.site");
 
@@ -522,7 +529,8 @@ if (!app.Environment.IsDevelopment())
 
         if (context.Request.Host.Host == "bcards.site")
         {
-            context.Request.Host = new HostString("bcards.site", 443);
+            // Fix para Cloudflare - não especificar porta explícita
+            context.Request.Host = new HostString("bcards.site");
         }
 
         await next();