feat: collapsible aux timers section, fix icon button variants

- Add a collapse toggle next to the aux timers settings shortcut,
  mirroring the chevron pattern already used for rundown groups. State
  persists in localStorage via the existing editorSettings store, so
  it's a durable per-user preference rather than resetting on reload.
  This matters most on small viewports, where the aux timer controls
  (3 rows) are a disproportionate cost relative to their usage.
- When collapsed, a small active-indicator dot appears next to the
  "Aux timers" label if any aux timer is currently running, so a
  running timer never goes silently invisible.
- Switch both header icon buttons (settings shortcut, collapse toggle)
  from the 'subtle' variant (blue, reserved for actions) to
  'subtle-white', matching how utility/navigation icon buttons are
  styled elsewhere (eg. the rundown group collapse chevron).

Verified in the browser: collapsing reclaims the three-row control
block, the indicator dot appears while a timer runs and the panel is
collapsed, and both icon buttons render white/gray instead of blue.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WCZejVTzuAY3tHTE6nB3JH

apps/client/src/common/hooks/useSocket.ts

@@ -103,6 +103,14 @@ export const useAuxTimersName = createSelector((state: RuntimeStore) => {
   };
 });
 
+export const useAuxTimersActive = createSelector((state: RuntimeStore) => {
+  return (
+    state.auxtimer1.playback === SimplePlayback.Start ||
+    state.auxtimer2.playback === SimplePlayback.Start ||
+    state.auxtimer3.playback === SimplePlayback.Start
+  );
+});
+
 export const useAuxTimerTime = (index: number) =>
   createSelector((state: RuntimeStore) => {
     if (index === 1) return state.auxtimer1.current;

apps/client/src/common/stores/editorSettings.ts

@@ -13,6 +13,7 @@ type EditorSettingsStore = {
   defaultTimerType: TimerType;
   defaultEndAction: EndAction;
   inheritGroupColour: boolean;
+  auxTimersCollapsed: boolean;
   setDefaultDuration: (defaultDuration: string) => void;
   setLinkPrevious: (linkPrevious: boolean) => void;
   setInheritGroupColour: (inheritGroupColour: boolean) => void;
@@ -21,6 +22,7 @@ type EditorSettingsStore = {
   setDangerTime: (dangerTime: string) => void;
   setDefaultTimerType: (defaultTimerType: TimerType) => void;
   setDefaultEndAction: (defaultEndAction: EndAction) => void;
+  setAuxTimersCollapsed: (auxTimersCollapsed: boolean) => void;
 };
 
 export const editorSettingsDefaults = {
@@ -32,6 +34,7 @@ export const editorSettingsDefaults = {
   timerType: TimerType.CountDown,
   endAction: EndAction.None,
   inheritGroupColour: false,
+  auxTimersCollapsed: false,
 };
 
 enum EditorSettingsKeys {
@@ -43,6 +46,7 @@ enum EditorSettingsKeys {
   DefaultTimerType = 'ontime-default-timer-type',
   DefaultEndAction = 'ontime-default-end-action',
   InheritGroupColour = 'ontime-inherit-group-colour',
+  AuxTimersCollapsed = 'ontime-aux-timers-collapsed',
 }
 
 export const useEditorSettings = create<EditorSettingsStore>((set) => {
@@ -67,6 +71,10 @@ export const useEditorSettings = create<EditorSettingsStore>((set) => {
       EditorSettingsKeys.InheritGroupColour,
       editorSettingsDefaults.inheritGroupColour,
     ),
+    auxTimersCollapsed: booleanFromLocalStorage(
+      EditorSettingsKeys.AuxTimersCollapsed,
+      editorSettingsDefaults.auxTimersCollapsed,
+    ),
 
     setDefaultDuration: (defaultDuration) =>
       set(() => {
@@ -110,5 +118,10 @@ export const useEditorSettings = create<EditorSettingsStore>((set) => {
         localStorage.setItem(EditorSettingsKeys.InheritGroupColour, String(inheritGroupColour));
         return { inheritGroupColour };
       }),
+    setAuxTimersCollapsed: (auxTimersCollapsed) =>
+      set(() => {
+        localStorage.setItem(EditorSettingsKeys.AuxTimersCollapsed, String(auxTimersCollapsed));
+        return { auxTimersCollapsed };
+      }),
   };
 });

apps/client/src/features/control/playback/PlaybackControl.module.scss

@@ -11,10 +11,26 @@
 }
 
 .label {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
   font-size: $inner-section-text-size;
   color: $label-gray;
 }
 
+.auxHeaderButtons {
+  display: flex;
+  align-items: center;
+  gap: 0.25rem;
+}
+
+.activeIndicator {
+  width: 0.5rem;
+  height: 0.5rem;
+  border-radius: 50%;
+  background-color: $active-indicator;
+}
+
 .auxTimers {
   display: grid;
   grid-template-columns: 1fr 1fr 1fr;

apps/client/src/features/control/playback/PlaybackControl.tsx

@@ -1,8 +1,9 @@
-import { IoSettingsOutline } from 'react-icons/io5';
+import { IoChevronDown, IoChevronUp, IoSettingsOutline } from 'react-icons/io5';
 
 import IconButton from '../../../common/components/buttons/IconButton';
 import Tooltip from '../../../common/components/tooltip/Tooltip';
-import { usePlaybackControl } from '../../../common/hooks/useSocket';
+import { useAuxTimersActive, usePlaybackControl } from '../../../common/hooks/useSocket';
+import { useEditorSettings } from '../../../common/stores/editorSettings';
 import useAppSettingsNavigation from '../../app-settings/useAppSettingsNavigation';
 import AddTime from './add-time/AddTime';
 import { AuxTimer } from './aux-timer/AuxTimer';
@@ -14,6 +15,8 @@ import style from './PlaybackControl.module.scss';
 export default function PlaybackControl() {
   const data = usePlaybackControl();
   const { setLocation } = useAppSettingsNavigation();
+  const { auxTimersCollapsed, setAuxTimersCollapsed } = useEditorSettings();
+  const isAuxTimerActive = useAuxTimersActive();
 
   return (
     <div className={style.mainContainer}>
@@ -27,26 +30,41 @@ export default function PlaybackControl() {
         timerPhase={data.timerPhase}
       />
       <div className={style.auxHeader}>
-        <span className={style.label}>Aux timers</span>
-        <Tooltip
-          text='Name aux timers'
-          render={
-            <IconButton
-              size='small'
-              variant='subtle'
-              aria-label='Name aux timers'
-              onClick={() => setLocation('settings__aux-timers')}
-            />
-          }
-        >
-          <IoSettingsOutline />
-        </Tooltip>
-      </div>
-      <div className={style.auxTimers}>
-        <AuxTimer index={1} />
-        <AuxTimer index={2} />
-        <AuxTimer index={3} />
+        <span className={style.label}>
+          Aux timers
+          {auxTimersCollapsed && isAuxTimerActive && <span className={style.activeIndicator} />}
+        </span>
+        <div className={style.auxHeaderButtons}>
+          <Tooltip
+            text='Name aux timers'
+            render={
+              <IconButton
+                size='small'
+                variant='subtle-white'
+                aria-label='Name aux timers'
+                onClick={() => setLocation('settings__aux-timers')}
+              />
+            }
+          >
+            <IoSettingsOutline />
+          </Tooltip>
+          <IconButton
+            size='small'
+            variant='subtle-white'
+            aria-label={auxTimersCollapsed ? 'Expand aux timers' : 'Collapse aux timers'}
+            onClick={() => setAuxTimersCollapsed(!auxTimersCollapsed)}
+          >
+            {auxTimersCollapsed ? <IoChevronUp /> : <IoChevronDown />}
+          </IconButton>
+        </div>
       </div>
+      {!auxTimersCollapsed && (
+        <div className={style.auxTimers}>
+          <AuxTimer index={1} />
+          <AuxTimer index={2} />
+          <AuxTimer index={3} />
+        </div>
+      )}
     </div>
   );
 }