feat: validate configuration

src/actions/transmission/config.rs

@@ -1,15 +1,16 @@
 use crate::app::Enableable;
+use crate::config::types::{AbsoluteDownloadDir, Host, Password, Port, Username};
 use serde::{Deserialize, Serialize};
 
 /// Configuration for the Transmission action
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct TransmissionConfig {
     pub enable: bool,
-    pub host: String,
-    pub username: String,
-    pub password: String,
-    pub port: u16,
-    pub download_dir: String,
+    pub host: Host,
+    pub username: Username,
+    pub password: Password,
+    pub port: Port,
+    pub download_dir: AbsoluteDownloadDir,
 }
 
 impl Enableable for TransmissionConfig {