Adds /api/system/stream — a Server-Sent Events feed driven by a single
per-process ticker that reads /proc directly and splices in the latest
host-side metrics.json each second. Subscribers share the connection so
N open tabs cost one ticker, and the ticker pauses entirely when nobody
is listening.
Frontend gets a singleton LiveSystem EventSource manager with auto-
reconnect, Page-Visibility integration (closes on tab hide), and last-
sample replay for late subscribers. Admin -> System gauges and the
dashboard memory + disk tile now tick at 1 Hz; trend charts and the
per-app table keep their 30 s poll because the underlying files only
regenerate once a minute.
Also adds /api/system/history as a thin range-query wrapper over the
existing 24 h JSON ring buffer — the binary ring backend will slot in
behind it in the next phase without changing the response shape.
Signed-off-by: librelad <librelad@digitalangels.vip>
New 'System' admin page (sidebar Tools group) rendering the metrics the
collector now produces:
- live ring gauges for CPU, memory, disk and load
- SVG trend charts (CPU/mem/disk/network) with 1h/6h/24h range toggle
- host info + swap + docker summary strips
- per-app table: CPU/mem bars, network, status, CPU sparkline
Charts are hand-rolled SVG in charts.js (LPCharts) — no third-party libs or
CDN calls — themed entirely from the active theme's CSS variables. The
Overview System card now links here.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
