feat: add notification suppression rules (#1525)

* feat: add notification suppression rules

* fix: restore label routing and routing test mocks for suppression

* fix: allow bell mute shortcuts for history-only notification categories

Suppression rule validation used the routable category whitelist, which rejected history-only categories such as update_started that appear in the bell during stack updates.

* feat: expand Mute Rules UX with compose-first entry points and activity badges

* fix: add missing NodeContext mocks for notification suppression tests

frontend/src/components/EditorLayout/MobileStackDetail.tsx

@@ -78,6 +78,7 @@ export function MobileStackDetail(props: EditorViewProps) {
         onRefreshState,
         onDismissRecovery,
         panelStartedAt,
+        stackMuteActions,
     } = props;
 
     const [segment, setSegment] = useState<Segment>('logs');
@@ -152,6 +153,7 @@ export function MobileStackDetail(props: EditorViewProps) {
                         rollbackStack={rollbackStack}
                         scanStackConfig={scanStackConfig}
                         requestDeleteStack={requestDeleteStack}
+                        stackMuteActions={stackMuteActions}
                     />
                 </div>
 
@@ -243,6 +245,7 @@ export function MobileStackDetail(props: EditorViewProps) {
                                 applying={loadingAction === 'update'}
                                 canEdit={canEditStack}
                                 notifications={notifications}
+                                stackMuteActions={stackMuteActions}
                             />
                         </div>
                     )}