feat: implement email verification and password reset features

- Add EmailTokenService for handling email verification and password reset tokens.
- Create EmailService for sending verification and reset emails via SMTP.
- Update AuthService to handle email verification status during login.
- Modify user registration to redirect to a check email screen instead of issuing a token.
- Implement resend verification email functionality.
- Add deep link handling for email verification and password reset in the mobile app.
- Update mobile app routes and components to support new email verification flow.
- Enhance error handling for unverified emails during login attempts.
- Update configuration to include SMTP settings for email service.

backend/src/infrastructure/email_service.rs

@@ -0,0 +1,67 @@
+use lettre::{
+    message::header::ContentType,
+    transport::smtp::authentication::Credentials,
+    AsyncSmtpTransport, AsyncTransport, Message, Tokio1Executor,
+};
+
+use crate::{config::Config, error::AppError};
+
+pub struct EmailService {
+    mailer: AsyncSmtpTransport<Tokio1Executor>,
+    from: String,
+}
+
+impl EmailService {
+    pub fn new(config: &Config) -> Result<Self, AppError> {
+        let creds = Credentials::new(config.smtp_user.clone(), config.smtp_pass.clone());
+
+        let mailer = AsyncSmtpTransport::<Tokio1Executor>::starttls_relay(&config.smtp_host)
+            .map_err(|e| AppError::Internal(anyhow::anyhow!("SMTP config error: {e}")))?
+            .port(config.smtp_port)
+            .credentials(creds)
+            .build();
+
+        Ok(Self {
+            mailer,
+            from: config.email_from.clone(),
+        })
+    }
+
+    pub async fn send_password_reset(&self, to: &str, reset_link: &str) -> Result<(), AppError> {
+        let body = format!(
+            "Você solicitou a redefinição de senha do MeowSpool.\n\nClique no link abaixo para redefinir sua senha (válido por 1 hora):\n\n{reset_link}\n\nSe você não solicitou isso, ignore este email."
+        );
+
+        self.send(to, "Redefinição de senha — MeowSpool", &body).await
+    }
+
+    pub async fn send_email_verification(&self, to: &str, verify_link: &str) -> Result<(), AppError> {
+        let body = format!(
+            "Bem-vindo ao MeowSpool! Confirme seu endereço de email clicando no link abaixo:\n\n{verify_link}\n\nO link expira em 24 horas."
+        );
+
+        self.send(to, "Confirme seu email — MeowSpool", &body).await
+    }
+
+    async fn send(&self, to: &str, subject: &str, body: &str) -> Result<(), AppError> {
+        let email = Message::builder()
+            .from(
+                self.from
+                    .parse()
+                    .map_err(|e| AppError::Internal(anyhow::anyhow!("Invalid from address: {e}")))?,
+            )
+            .to(to
+                .parse()
+                .map_err(|e| AppError::Internal(anyhow::anyhow!("Invalid to address: {e}")))?)
+            .subject(subject)
+            .header(ContentType::TEXT_PLAIN)
+            .body(body.to_string())
+            .map_err(|e| AppError::Internal(anyhow::anyhow!("Email build error: {e}")))?;
+
+        AsyncTransport::send(&self.mailer, email)
+            .await
+            .map_err(|e| AppError::Internal(anyhow::anyhow!("SMTP send error: {e}")))?;
+
+        Ok(())
+    }
+}

backend/src/infrastructure/mod.rs

@@ -0,0 +1,3 @@
+pub mod email_service;
+
+pub use email_service::EmailService;