manager events: Spawned/Rebuilt/Killed/Destroyed + start button

hive-c0re/src/auto_update.rs

@@ -58,7 +58,7 @@ pub async fn rebuild_agent(coord: &Arc<Coordinator>, name: &str, current_rev: &s
         .with_context(|| format!("ensure_runtime {name}"))?;
     let applied_dir = Coordinator::agent_applied_dir(name);
     let claude_dir = Coordinator::agent_claude_dir(name);
-    lifecycle::rebuild(
+    let result = lifecycle::rebuild(
         name,
         &coord.hyperhive_flake,
         &agent_dir,
@@ -66,10 +66,27 @@ pub async fn rebuild_agent(coord: &Arc<Coordinator>, name: &str, current_rev: &s
         &claude_dir,
         coord.dashboard_port,
     )
-    .await?;
-    std::fs::write(rev_marker_path(name), current_rev)
-        .with_context(|| format!("write rev marker for {name}"))?;
-    Ok(())
+    .await;
+    match &result {
+        Ok(()) => {
+            if let Err(e) = std::fs::write(rev_marker_path(name), current_rev) {
+                tracing::warn!(%name, error = ?e, "write rev marker failed");
+            }
+            coord.notify_manager(&hive_sh4re::HelperEvent::Rebuilt {
+                agent: name.to_owned(),
+                ok: true,
+                note: None,
+            });
+        }
+        Err(e) => {
+            coord.notify_manager(&hive_sh4re::HelperEvent::Rebuilt {
+                agent: name.to_owned(),
+                ok: false,
+                note: Some(format!("{e:#}")),
+            });
+        }
+    }
+    result
 }
 
 /// Auto-create the manager container on startup if it isn't already there.