feat: implement server configuration with address and port options

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/modes/server/common.rs

@@ -20,20 +20,10 @@ use utoipa::ToSchema;
 #[derive(Debug, Clone)]
 pub struct ServerConfig {
     pub address: String,
+    pub port: Option<u16>,
     pub password: Option<String>,
 }
 
-impl FromStr for ServerConfig {
-    type Err = anyhow::Error;
-    
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        Ok(ServerConfig {
-            address: s.to_string(),
-            password: None,
-        })
-    }
-}
-
 #[derive(Clone)]
 pub struct AppState {
     pub db: Arc<Mutex<rusqlite::Connection>>,