feat: Add local system override with 24h timeout support

drb-frontend/lib/c2api.ts

@@ -30,6 +30,12 @@ export const c2api = {
     if (ppmOverride !== undefined) params.set("ppm_override", String(ppmOverride));
     return request(`/nodes/${nodeId}/config/${systemId}?${params}`, { method: "POST" });
   },
+  ackOverride: (nodeId: string, timeoutMinutes: number = 1440) =>
+    request(`/nodes/${nodeId}/override/ack`, { method: "POST", body: JSON.stringify({ timeout_minutes: timeoutMinutes }) }),
+  resetOverride: (nodeId: string) =>
+    request(`/nodes/${nodeId}/override/reset`, { method: "POST" }),
+  updateNode: (id: string, body: { node_type?: string; enforce_override_timeout?: boolean }) =>
+    request(`/nodes/${id}`, { method: "PATCH", body: JSON.stringify(body) }),
 
   // Systems
   getSystems: () => request<unknown[]>("/systems"),

drb-frontend/lib/types.ts

@@ -52,6 +52,11 @@ export interface NodeRecord {
   approval_status: ApprovalStatus | null;
   hardware_preset?: string;
   ppm_override?: number | null;
+  node_type?: string;
+  enforce_override_timeout?: boolean;
+  is_overridden?: boolean;
+  override_system_id?: string | null;
+  override_timeout_at?: string | null;
 }
 
 export interface VocabularyPendingTerm {