Add daemon restart feature from settings (#18)

* Add daemon restart feature from settings

This adds the ability to restart a connected daemon from the settings page.
The feature includes:

- Backend: RestartDaemon command added to DaemonCommand enum
- Backend: New POST /api/v1/mesh/daemons/{id}/restart endpoint
- Backend: Daemon gracefully shuts down tasks and exits with code 42
  (can be used by process managers like systemd to detect restart requests)
- Frontend: restartDaemon() API function
- Frontend: Restart button in Connected Daemons section of settings
- Frontend: Confirmation dialog before restart to prevent accidental restarts

When a daemon receives the restart command, it:
1. Gracefully shuts down all running Claude processes (5s timeout)
2. Exits with code 42 to signal restart requested
3. The daemon can be restarted by a process manager or manually

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/makima/frontend/src/lib/api.ts b/makima/frontend/src/lib/api.ts
index 86ff06c..efa72a2 100644
--- a/makima/frontend/src/lib/api.ts
+++ b/makima/frontend/src/lib/api.ts
@@ -1087,6 +1087,29 @@ export async function getDaemon(id: string): Promise<Daemon> {
   return res.json();
 }
 
+/** Response from the restart daemon endpoint */
+export interface RestartDaemonResponse {
+  success: boolean;
+  daemonId: string;
+  message: string;
+}
+
+/**
+ * Restart a connected daemon.
+ * Sends a restart command to the daemon, which will gracefully terminate
+ * and restart. Any running tasks will be interrupted.
+ */
+export async function restartDaemon(id: string): Promise<RestartDaemonResponse> {
+  const res = await authFetch(`${API_BASE}/api/v1/mesh/daemons/${id}/restart`, {
+    method: "POST",
+  });
+  if (!res.ok) {
+    const errorData = await res.json().catch(() => ({}));
+    throw new Error(errorData.message || `Failed to restart daemon: ${res.statusText}`);
+  }
+  return res.json();
+}
+
 // =============================================================================
 // Mesh Chat Types for Task Orchestration
 // =============================================================================