Show live background task counts

server/src/session/claude.rs

@@ -510,6 +510,10 @@ impl ClaudeDriver {
 }
 
 impl Driver for ClaudeDriver {
+    fn background_tasks(&self) -> Option<usize> {
+        self.state.lock().unwrap().background_task_count()
+    }
+
     fn send_user_message(&self, text: String, attachments: Vec<AttachmentRef>) {
         let mut content = Vec::new();
         // An image goes into the message itself; the model looks at it. Any