feat: update agent button on server page

web/lib/api.ts

@@ -8,6 +8,7 @@ export interface Server {
   ip_address: string;
   os_info: string;
   status: ServerStatus;
+  agent_version?: string;
   last_seen: string;
   created_at: string;
 }
@@ -116,6 +117,16 @@ export const api = {
     return `curl -fsSL "${window.location.origin}/update" | bash`;
   },
 
+  getLatestAgentVersion(): Promise<{ version: string }> {
+    return request<{ version: string }>("/agent/latest-version");
+  },
+
+  updateAgent(serverId: string): Promise<{ message: string; version: string }> {
+    return request<{ message: string; version: string }>(`/servers/${serverId}/update-agent`, {
+      method: "POST",
+    });
+  },
+
   // Keys
   listKeys(): Promise<Key[]> {
     return request<Key[]>("/keys");