feat(admin-remnawave): provider favicon, mobile node card, meaningful icons

- Render the provider favicon in the node badge (new provider_favicon / provider_name fields), with graceful fallback.
- Mobile-friendly node card: stop the versions block from shifting right on wrapped rows, truncate long addresses, cap the provider badge.
- Give node-summary cards (total/online/offline/disabled) and traffic-period cards (2d/7d/30d/month/year) distinct, meaningful icons instead of all-the-same globe / bar-chart.
- Show traffic as 'used / limit' (e.g. 2.35 TB / ∞).
- Route every icon through the central barrel (drop the direct react-icons/pi import).

src/api/adminRemnawave.ts

@@ -134,6 +134,8 @@ export interface NodeInfo {
   created_at?: string;
   updated_at?: string;
   provider_uuid?: string;
+  provider_name?: string | null;
+  provider_favicon?: string | null;
   versions?: { xray: string; node: string } | null;
   system?: {
     info: {