Alejandro Gutiérrez 43936fc601 Add System Trends sparkline charts using Recharts + Prometheus ...

- Add recharts dependency for area chart visualizations
- Add /api/metrics route querying Prometheus query_range (CPU, RAM, Network)
- Add SystemTrends component with 3 sparkline area charts (6h window, 2min steps)
- CPU (emerald), RAM (amber), Network I/O (indigo) with gradient fills
- Tooltips show exact values on hover, time axis with formatted labels
- Link to Grafana for deep-dive analysis
- Fetches every 60s, shimmer loading state

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

2026-02-03 22:40:23 +01:00

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