feat: enhance email configuration and validation features

- Implemented mutual exclusivity for SSL and TLS options in the email configuration.
- Added comprehensive validation for required fields, port range, email format, and password requirements.
- Updated the backend to support reversible encryption for SMTP passwords, ensuring secure handling of sensitive data.
- Introduced loading states and improved user feedback in the email configuration UI for better user experience.

packages/backend/convex/actions/email.ts

@@ -23,8 +23,8 @@ export const enviar = action({
         return { sucesso: false, erro: "Email não encontrado" };
       }
 
-      // Buscar configuração SMTP ativa
-      const config = await ctx.runQuery(internal.email.getActiveEmailConfig, {});
+      // Buscar configuração SMTP ativa com senha descriptografada
+      const config = await ctx.runQuery(internal.email.getActiveEmailConfigWithPassword, {});
 
       if (!config) {
         return {
@@ -52,8 +52,7 @@ export const enviar = action({
         secure: config.usarSSL,
         auth: {
           user: config.usuario,
-          // Em produção deve ser armazenado com criptografia reversível
-          pass: config.senhaHash,
+          pass: config.senha, // Senha já descriptografada
         },
         tls: {
           // Permitir certificados autoassinados