Enhance UI output to include last modified date for virtual environments

Author: yashksaini-coder

src/ui.rs

@@ -6,11 +6,16 @@ pub fn draw_ui(app: &App) {
     for (i, venv) in app.venvs.iter().enumerate() {
         let marker = if i == app.selected { ">" } else { " " };
         let size_mb = venv.size / 1024 / 1024;
+        let modified = match venv.last_modified {
+            Some(dt) => dt.format("%Y-%m-%d %H:%M").to_string(),
+            None => "N/A".to_string(),
+        };
 
         println!(
-            "{} [{} MB] {}",
+            "{} [{} MB] [{}] {}",
             marker,
             size_mb,
+            modified,
             venv.path.display()
         );
     }