feat(admin-remnawave): enrich panel stats UI and fix nodes-online display

- Show nodes as "online / total" (fixes "56 online" when only 5 nodes exist)
- Add recap, devices (+top users by device count), top-consumers, panel
  health and subscription-request widgets, with profile-specific Phosphor
  metric icons (CPU/RAM/uptime/devices/event-loop)
- Add the matching adminRemnawave API types and methods

src/api/adminRemnawave.ts

@@ -21,12 +21,57 @@ export interface SystemSummary {
   total_users: number;
   active_connections: number;
   nodes_online: number;
+  total_nodes: number;
   users_last_day: number;
   users_last_week: number;
   users_never_online: number;
   total_user_traffic: number;
 }
 
+// Panel recap / devices / top consumers
+export interface RecapResponse {
+  version: string | null;
+  init_date: string | null;
+  total: {
+    users: number;
+    nodes: number;
+    traffic_bytes: number;
+    nodes_ram_bytes: number;
+    nodes_cpu_cores: number;
+    distinct_countries: number;
+  };
+  this_month: { users: number; traffic_bytes: number };
+}
+
+export interface DevicesStatsResponse {
+  by_platform: { platform: string; count: number }[];
+  by_app: { app: string; count: number }[];
+  top_users: { username: string; devices_count: number }[];
+  total_unique_devices: number;
+  total_hwid_devices: number;
+  average_devices_per_user: number;
+}
+
+export interface TopConsumersResponse {
+  period_days: number;
+  users: { username: string; total_bytes: number }[];
+}
+
+export interface HealthResponse {
+  instances: number;
+  rss_bytes: number;
+  heap_used_bytes: number;
+  heap_total_bytes: number;
+  event_loop_delay_ms: number;
+  event_loop_p99_ms: number;
+  uptime_seconds: number;
+  instance_id: string | null;
+}
+
+export interface SubscriptionRequestStatsResponse {
+  by_app: { app: string; count: number }[];
+}
+
 export interface ServerInfo {
   cpu_cores: number;
   memory_total: number;
@@ -292,6 +337,34 @@ export const adminRemnawaveApi = {
     return response.data;
   },
 
+  // Panel recap / devices / top consumers
+  getRecap: async (): Promise<RecapResponse> => {
+    const response = await apiClient.get('/cabinet/admin/remnawave/recap');
+    return response.data;
+  },
+
+  getDevicesStats: async (): Promise<DevicesStatsResponse> => {
+    const response = await apiClient.get('/cabinet/admin/remnawave/devices-stats');
+    return response.data;
+  },
+
+  getTopConsumers: async (days = 7, limit = 10): Promise<TopConsumersResponse> => {
+    const response = await apiClient.get('/cabinet/admin/remnawave/top-consumers', {
+      params: { days, limit },
+    });
+    return response.data;
+  },
+
+  getHealth: async (): Promise<HealthResponse> => {
+    const response = await apiClient.get('/cabinet/admin/remnawave/health');
+    return response.data;
+  },
+
+  getSubscriptionRequests: async (): Promise<SubscriptionRequestStatsResponse> => {
+    const response = await apiClient.get('/cabinet/admin/remnawave/subscription-requests');
+    return response.data;
+  },
+
   // Nodes
   getNodes: async (): Promise<NodesListResponse> => {
     const response = await apiClient.get('/cabinet/admin/remnawave/nodes');