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feat(prometheus-direct-charting): slice 2 — gauge + mean widgets

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Add gauge widget (recharts RadialBarChart with configurable threshold
bands, scalar-only per SC-111) and mean widget (client-side average over
range-query window, scalar-only per SC-114). Extract shared _instant_query
helper from the metric path; _fetch_gauge and _fetch_mean dispatch in
PrometheusWidgetSource.fetch(). Both new widget kinds declared in
integrations/prometheus.py and frontend registry.

Backend: 305 pytest pass, ruff clean. Frontend: 136 vitest pass, build+lint green.
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Developer
2026-07-08 22:09:10 +00:00
parent 5dad98231f
commit 65bae95e3c
12 changed files with 707 additions and 32 deletions
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backend/tests/test_services.py
+1 -1
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@@ -100,7 +100,7 @@ def test_authentik_service_definition():
def test_definitions_declare_widget_kinds():
assert {wk.kind for wk in get_service_definition("grafana").widget_kinds} == {"link", "chart"}
assert {wk.kind for wk in get_service_definition("prometheus").widget_kinds} == {"metric", "chart"}
assert {wk.kind for wk in get_service_definition("prometheus").widget_kinds} == {"metric", "chart", "gauge", "mean"}
assert {wk.kind for wk in get_service_definition("alertmanager").widget_kinds} == {"active_alerts"}
assert {wk.kind for wk in get_service_definition("jellyfin").widget_kinds} == {"activity", "now_playing"}
assert get_service_definition("nextcloud").widget_kinds == []