ref(crons): Refresh detector when environment is muted/unmuted

Fixed [NEW-592: Muting cron environment does not refresh detector](https://linear.app/getsentry/issue/NEW-592/muting-cron-environment-does-not-refresh-detector)

When muting/unmuting or deleting a cron monitor environment from the
detector details page, the parent detector state wasn't being refreshed,
causing stale data to display.

Added onEnvironmentUpdated callback to DetailsTimeline component that
invalidates the detector query when environment status changes, ensuring
the UI stays in sync with the backend state.

Author: evanpurkhiser

static/app/actionCreators/monitors.tsx

@@ -102,7 +102,7 @@ export async function setEnvironmentIsMuted(
 
   try {
     const resp = await api.requestPromise(
-      `/projects/${orgId}/${monitor.project.slug}/monitors/${monitor.slug}/environments/${environment}`,
+      `/projects/${orgId}/${monitor.project.slug}/monitors/${monitor.slug}/environments/${environment}/`,
       {method: 'PUT', data: {isMuted}}
     );
     clearIndicators();

static/app/views/detectors/components/details/cron/index.spec.tsx

@@ -342,4 +342,71 @@ describe('CronDetectorDetails - check-ins', () => {
       expect(screen.getByRole('button', {name: 'Enable'})).toBeInTheDocument();
     });
   });
+
+  describe('environment muting', () => {
+    it('refetches detector when environment is muted', async () => {
+      const detectorWithMultipleEnvs = CronDetectorFixture({
+        id: '1',
+        projectId: project.id,
+        dataSources: [
+          CronMonitorDataSourceFixture({
+            queryObj: {
+              ...CronMonitorDataSourceFixture().queryObj,
+              environments: [
+                CronMonitorEnvironmentFixture({
+                  name: 'production',
+                  lastCheckIn: '2025-01-01T00:00:00Z',
+                  isMuted: false,
+                }),
+                CronMonitorEnvironmentFixture({
+                  name: 'staging',
+                  lastCheckIn: '2025-01-01T00:00:00Z',
+                  isMuted: false,
+                }),
+              ],
+            },
+          }),
+        ],
+      });
+
+      const muteRequest = MockApiClient.addMockResponse({
+        url: `/projects/org-slug/${project.slug}/monitors/${detectorWithMultipleEnvs.dataSources[0].queryObj.slug}/environments/production/`,
+        method: 'PUT',
+        body: {},
+      });
+
+      const detectorRefetchRequest = MockApiClient.addMockResponse({
+        url: `/organizations/org-slug/detectors/1/`,
+        body: detectorWithMultipleEnvs,
+      });
+
+      render(
+        <CronDetectorDetails detector={detectorWithMultipleEnvs} project={project} />
+      );
+
+      await screen.findByText('Recent Check-Ins');
+
+      expect(detectorRefetchRequest).toHaveBeenCalledTimes(1);
+
+      const envButtons = screen.getAllByRole('button', {
+        name: 'Monitor environment actions',
+      });
+      await userEvent.click(envButtons[0]!);
+
+      await userEvent.click(
+        await screen.findByRole('menuitemradio', {name: 'Mute Environment'})
+      );
+
+      expect(muteRequest).toHaveBeenCalledTimes(1);
+      expect(muteRequest).toHaveBeenCalledWith(
+        expect.stringContaining('/environments/production'),
+        expect.objectContaining({
+          method: 'PUT',
+          data: {isMuted: true},
+        })
+      );
+
+      expect(detectorRefetchRequest).toHaveBeenCalledTimes(2);
+    });
+  });
 });

static/app/views/detectors/components/details/cron/index.tsx

@@ -22,6 +22,7 @@ import {t, tn} from 'sentry/locale';
 import type {Project} from 'sentry/types/project';
 import type {CronDetector} from 'sentry/types/workflowEngine/detectors';
 import toArray from 'sentry/utils/array/toArray';
+import {useQueryClient} from 'sentry/utils/queryClient';
 import {useLocation} from 'sentry/utils/useLocation';
 import useOrganization from 'sentry/utils/useOrganization';
 import {
@@ -35,7 +36,10 @@ import {DisabledAlert} from 'sentry/views/detectors/components/details/common/di
 import {DetectorExtraDetails} from 'sentry/views/detectors/components/details/common/extraDetails';
 import {DetectorDetailsHeader} from 'sentry/views/detectors/components/details/common/header';
 import {DetectorDetailsOpenPeriodIssues} from 'sentry/views/detectors/components/details/common/openPeriodIssues';
-import {useDetectorQuery} from 'sentry/views/detectors/hooks';
+import {
+  makeDetectorDetailsQueryKey,
+  useDetectorQuery,
+} from 'sentry/views/detectors/hooks';
 import {DetailsTimeline} from 'sentry/views/insights/crons/components/detailsTimeline';
 import {DetailsTimelineLegend} from 'sentry/views/insights/crons/components/detailsTimelineLegend';
 import {MonitorCheckIns} from 'sentry/views/insights/crons/components/monitorCheckIns';
@@ -69,6 +73,7 @@ export function CronDetectorDetails({detector, project}: CronDetectorDetailsProp
   const userTimezone = useTimezone();
   const [timezoneOverride, setTimezoneOverride] = useState(userTimezone);
   const openDocsPanel = useDocsPanel(dataSource.queryObj.slug, project);
+  const queryClient = useQueryClient();
 
   useDetectorQuery<CronDetector>(detector.id, {
     staleTime: 0,
@@ -83,6 +88,14 @@ export function CronDetectorDetails({detector, project}: CronDetectorDetailsProp
     },
   });
 
+  const handleEnvironmentUpdated = useCallback(() => {
+    const queryKey = makeDetectorDetailsQueryKey({
+      orgSlug: organization.slug,
+      detectorId: detector.id,
+    });
+    queryClient.invalidateQueries({queryKey});
+  }, [queryClient, organization.slug, detector.id]);
+
   const {checkinErrors, handleDismissError} = useMonitorProcessingErrors({
     organization,
     projectId: project.id,
@@ -174,6 +187,7 @@ export function CronDetectorDetails({detector, project}: CronDetectorDetailsProp
                 <DetailsTimeline
                   monitor={filteredMonitor}
                   onStatsLoaded={checkHasUnknown}
+                  onEnvironmentUpdated={handleEnvironmentUpdated}
                 />
                 <ErrorBoundary mini>
                   <DetectorDetailsOpenPeriodIssues

static/app/views/insights/crons/components/detailsTimeline.tsx

@@ -30,13 +30,17 @@ import {CronServiceIncidents} from './serviceIncidents';
 
 interface Props {
   monitor: Monitor;
+  /**
+   * Called when an environment is updated (muted/unmuted/deleted).
+   */
+  onEnvironmentUpdated?: () => void;
   /**
    * Called when monitor stats have been loaded for this timeline.
    */
   onStatsLoaded?: (stats: MonitorBucket[]) => void;
 }
 
-export function DetailsTimeline({monitor, onStatsLoaded}: Props) {
+export function DetailsTimeline({monitor, onStatsLoaded, onEnvironmentUpdated}: Props) {
   const organization = useOrganization();
   const location = useLocation();
   const api = useApi();
@@ -89,6 +93,8 @@ export function DetailsTimeline({monitor, onStatsLoaded}: Props) {
           }
         : undefined;
     });
+
+    onEnvironmentUpdated?.();
   };
 
   const handleToggleMuteEnvironment = async (env: string, isMuted: boolean) => {
@@ -119,6 +125,8 @@ export function DetailsTimeline({monitor, onStatsLoaded}: Props) {
           }
         : undefined;
     });
+
+    onEnvironmentUpdated?.();
   };
 
   return (