feat(call): PTT, deafen label, camera default off, screenshare confirm, noise suppression setting

- Push to Talk: keydown/keyup binds mic to configurable key (default Space)
  with visual PTT indicator and key-binding UI in Settings > General > Calls
- Camera always defaults OFF on join; cameraOnJoin setting for explicit opt-in
- Deafen button tooltip corrected to Deafen/Undeafen instead of Turn Off/On Sound
- Screenshare confirmation dialog before broadcasting to call participants
- Noise suppression toggle wired from settings through CallEmbed URL params
- CallControl.setMicrophone() public method for programmatic mic control
- Calls settings section added to General settings page

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/features/call/CallControls.tsx

@@ -1,4 +1,4 @@
-import React, { MouseEventHandler, useCallback, useRef, useState } from 'react';
+import React, { MouseEventHandler, useCallback, useEffect, useRef, useState } from 'react';
 import {
   Box,
   Button,
@@ -26,6 +26,8 @@ import {
   VideoButton,
 } from './Controls';
 import { CallEmbed, useCallControlState } from '../../plugins/call';
+import { useSetting } from '../../state/hooks/settings';
+import { settingsAtom } from '../../state/settings';
 import { useResizeObserver } from '../../hooks/useResizeObserver';
 import { stopPropagation } from '../../utils/keyboard';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
@@ -51,6 +53,10 @@ export function CallControls({ callEmbed }: CallControlsProps) {
   );
 
   const [cords, setCords] = useState<RectCords>();
+  const [shareConfirm, setShareConfirm] = useState(false);
+  const [pttMode] = useSetting(settingsAtom, 'pttMode');
+  const [pttKey] = useSetting(settingsAtom, 'pttKey');
+  const [pttActive, setPttActive] = useState(false);
 
   const handleOpenMenu: MouseEventHandler<HTMLButtonElement> = (evt) => {
     setCords(evt.currentTarget.getBoundingClientRect());
@@ -71,12 +77,37 @@ export function CallControls({ callEmbed }: CallControlsProps) {
     setCords(undefined);
   };
 
+  useEffect(() => {
+    if (!pttMode) return;
+    const onKeyDown = (e: KeyboardEvent) => {
+      if (e.code === pttKey && !e.repeat && !microphone) {
+        e.preventDefault();
+        callEmbed.control.setMicrophone(true);
+        setPttActive(true);
+      }
+    };
+    const onKeyUp = (e: KeyboardEvent) => {
+      if (e.code === pttKey) {
+        callEmbed.control.setMicrophone(false);
+        setPttActive(false);
+      }
+    };
+    window.addEventListener('keydown', onKeyDown);
+    window.addEventListener('keyup', onKeyUp);
+    return () => {
+      window.removeEventListener('keydown', onKeyDown);
+      window.removeEventListener('keyup', onKeyUp);
+    };
+  }, [pttMode, pttKey, callEmbed, microphone]);
+
   const [hangupState, hangup] = useAsyncCallback(
     useCallback(() => callEmbed.hangup(), [callEmbed])
   );
   const exiting =
     hangupState.status === AsyncStatus.Loading || hangupState.status === AsyncStatus.Success;
 
+  const pttKeyLabel = pttKey === 'Space' ? 'SPACE' : pttKey.replace('Key', '').replace('Digit', '');
+
   return (
     <Box
       ref={controlRef}
@@ -84,6 +115,63 @@ export function CallControls({ callEmbed }: CallControlsProps) {
       justifyContent="Center"
       alignItems="Center"
     >
+      {pttMode && (
+        <Box
+          style={{
+            position: 'absolute',
+            top: '-2.5rem',
+            left: '50%',
+            transform: 'translateX(-50%)',
+            background: pttActive ? 'rgba(0,255,136,0.18)' : 'rgba(255,107,0,0.12)',
+            border: `1px solid ${pttActive ? 'rgba(0,255,136,0.55)' : 'rgba(255,107,0,0.35)'}`,
+            borderRadius: '99px',
+            padding: '0.2rem 0.9rem',
+            pointerEvents: 'none',
+            whiteSpace: 'nowrap',
+          }}
+        >
+          <Text size="T200" style={{ color: pttActive ? '#00FF88' : '#FF6B00', fontWeight: 700, letterSpacing: '0.08em' }}>
+            {pttActive ? '● LIVE' : `PTT — Hold ${pttKeyLabel}`}
+          </Text>
+        </Box>
+      )}
+      {shareConfirm && (
+        <Box
+          style={{
+            position: 'absolute',
+            bottom: '110%',
+            left: '50%',
+            transform: 'translateX(-50%)',
+            background: 'var(--bg-surface)',
+            border: '1px solid var(--border-color)',
+            borderRadius: '0.75rem',
+            padding: '1rem 1.25rem',
+            zIndex: 100,
+            minWidth: '260px',
+            boxShadow: '0 8px 32px rgba(0,0,0,0.35)',
+            display: 'flex',
+            flexDirection: 'column',
+            gap: '0.75rem',
+          }}
+        >
+          <Text size="T300" style={{ fontWeight: 600 }}>Share your screen?</Text>
+          <Text size="T200" style={{ opacity: 0.75 }}>Your screen will be visible to all participants in this call.</Text>
+          <Box gap="200">
+            <Button
+              size="300" variant="Success" fill="Solid" radii="300"
+              onClick={() => { callEmbed.control.toggleScreenshare(); setShareConfirm(false); }}
+            >
+              <Text size="B300">Share</Text>
+            </Button>
+            <Button
+              size="300" variant="Surface" fill="Soft" radii="300" outlined
+              onClick={() => setShareConfirm(false)}
+            >
+              <Text size="B300">Cancel</Text>
+            </Button>
+          </Box>
+        </Box>
+      )}
       <SequenceCard
         className={css.ControlCard}
         variant="SurfaceVariant"
@@ -105,7 +193,10 @@ export function CallControls({ callEmbed }: CallControlsProps) {
             <VideoButton enabled={video} onToggle={() => callEmbed.control.toggleVideo()} />
             <ScreenShareButton
               enabled={screenshare}
-              onToggle={() => callEmbed.control.toggleScreenshare()}
+              onToggle={() => screenshare
+                ? callEmbed.control.toggleScreenshare()
+                : setShareConfirm(true)
+              }
             />
           </Box>
         </Box>

src/app/features/call/Controls.tsx

@@ -53,7 +53,7 @@ export function SoundButton({ enabled, onToggle }: SoundButtonProps) {
       delay={500}
       tooltip={
         <Tooltip>
-          <Text size="T200">{enabled ? 'Turn Off Sound' : 'Turn On Sound'}</Text>
+          <Text size="T200">{enabled ? 'Deafen' : 'Undeafen'}</Text>
         </Tooltip>
       }
     >

src/app/features/settings/general/General.tsx

@@ -805,6 +805,80 @@ function Editor() {
 }
 
 
+function Calls() {
+  const [cameraOnJoin, setCameraOnJoin] = useSetting(settingsAtom, 'cameraOnJoin');
+  const [callNoiseSuppression, setCallNoiseSuppression] = useSetting(settingsAtom, 'callNoiseSuppression');
+  const [pttMode, setPttMode] = useSetting(settingsAtom, 'pttMode');
+  const [pttKey, setPttKey] = useSetting(settingsAtom, 'pttKey');
+  const [listeningForKey, setListeningForKey] = useState(false);
+
+  const handleKeyBind = () => {
+    setListeningForKey(true);
+    const onKey = (e: KeyboardEvent) => {
+      e.preventDefault();
+      if (e.code === 'Escape') {
+        setListeningForKey(false);
+      } else {
+        setPttKey(e.code);
+        setListeningForKey(false);
+      }
+      window.removeEventListener('keydown', onKey, true);
+    };
+    window.addEventListener('keydown', onKey, true);
+  };
+
+  const keyLabel = (code: string) => code === 'Space' ? 'Space' : code.replace('Key', '').replace('Digit', '');
+
+  return (
+    <Box direction="Column" gap="100">
+      <Text size="L400">Calls</Text>
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+        <SettingTile
+          title="Join with Camera On"
+          description="Enable camera automatically when joining a voice or video call. Camera is off by default."
+          after={<Switch variant="Primary" value={cameraOnJoin} onChange={setCameraOnJoin} />}
+        />
+      </SequenceCard>
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+        <SettingTile
+          title="Noise Suppression"
+          description="Apply AI noise suppression to filter background noise during calls (powered by Element Call)."
+          after={<Switch variant="Primary" value={callNoiseSuppression} onChange={setCallNoiseSuppression} />}
+        />
+      </SequenceCard>
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column" gap="400">
+        <SettingTile
+          title="Push to Talk"
+          description="Mute your microphone by default. Hold the PTT key to speak."
+          after={<Switch variant="Primary" value={pttMode} onChange={setPttMode} />}
+        />
+        {pttMode && (
+          <SettingTile
+            title="PTT Key Binding"
+            description="Press a key to bind it as your push-to-talk key."
+            after={
+              <Button
+                size="300"
+                variant={listeningForKey ? 'Warning' : 'Secondary'}
+                fill={listeningForKey ? 'Solid' : 'Soft'}
+                radii="300"
+                outlined
+                onClick={handleKeyBind}
+                style={{ minWidth: '90px' }}
+              >
+                <Text size="B300">
+                  {listeningForKey ? 'Press a key…' : keyLabel(pttKey)}
+                </Text>
+              </Button>
+            }
+          />
+        )}
+      </SequenceCard>
+    </Box>
+  );
+}
+
+
 function ChatBgGrid() {
   const [chatBackground, setChatBackground] = useSetting(settingsAtom, 'chatBackground');
   const theme = useTheme();
@@ -1110,6 +1184,7 @@ export function General({ requestClose }: GeneralProps) {
               <DateAndTime />
               <Editor />
               <Messages />
+              <Calls />
             </Box>
           </PageContent>
         </Scroll>

src/app/hooks/useCallEmbed.ts

@@ -15,6 +15,8 @@ import { useResizeObserver } from './useResizeObserver';
 import { CallControlState } from '../plugins/call/CallControlState';
 import { useCallMembersChange, useCallSession } from './useCall';
 import { CallPreferences } from '../state/callPreferences';
+import { useSetting } from '../state/hooks/settings';
+import { settingsAtom } from '../state/settings';
 
 const CallEmbedContext = createContext<CallEmbed | undefined>(undefined);
 
@@ -42,14 +44,15 @@ export const createCallEmbed = (
   dm: boolean,
   themeKind: ElementCallThemeKind,
   container: HTMLElement,
-  pref?: CallPreferences
+  pref?: CallPreferences,
+  noiseSuppression = true
 ): CallEmbed => {
   const rtcSession = mx.matrixRTC.getRoomSession(room);
   const ongoing =
     MatrixRTCSession.sessionMembershipsForRoom(room, rtcSession.sessionDescription).length > 0;
 
   const intent = CallEmbed.getIntent(dm, ongoing);
-  const widget = CallEmbed.getWidget(mx, room, intent, themeKind);
+  const widget = CallEmbed.getWidget(mx, room, intent, themeKind, noiseSuppression);
   const controlState = pref && new CallControlState(pref.microphone, pref.video, pref.sound);
 
   const embed = new CallEmbed(mx, room, widget, container, controlState);
@@ -62,6 +65,7 @@ export const useCallStart = (dm = false) => {
   const theme = useTheme();
   const setCallEmbed = useSetAtom(callEmbedAtom);
   const callEmbedRef = useCallEmbedRef();
+  const [callNoiseSuppression] = useSetting(settingsAtom, 'callNoiseSuppression');
 
   const startCall = useCallback(
     (room: Room, pref?: CallPreferences) => {
@@ -69,11 +73,11 @@ export const useCallStart = (dm = false) => {
       if (!container) {
         throw new Error('Failed to start call, No embed container element found!');
       }
-      const callEmbed = createCallEmbed(mx, room, dm, theme.kind, container, pref);
+      const callEmbed = createCallEmbed(mx, room, dm, theme.kind, container, pref, callNoiseSuppression ?? true);
 
       setCallEmbed(callEmbed);
     },
-    [mx, dm, theme, setCallEmbed, callEmbedRef]
+    [mx, dm, theme, setCallEmbed, callEmbedRef, callNoiseSuppression]
   );
 
   return startCall;

src/app/plugins/call/CallControl.ts

@@ -173,6 +173,14 @@ export class CallControl extends EventEmitter implements CallControlState {
     this.emitStateUpdate();
   }
 
+  public setMicrophone(enabled: boolean) {
+    const payload: ElementMediaStatePayload = {
+      audio_enabled: enabled,
+      video_enabled: this.video,
+    };
+    return this.setMediaState(payload);
+  }
+
   public toggleMicrophone() {
     const payload: ElementMediaStatePayload = {
       audio_enabled: !this.microphone,

src/app/plugins/call/CallEmbed.ts

@@ -59,7 +59,8 @@ export class CallEmbed {
     mx: MatrixClient,
     room: Room,
     intent: ElementCallIntent,
-    themeKind: ElementCallThemeKind
+    themeKind: ElementCallThemeKind,
+    noiseSuppression = true
   ): Widget {
     const userId = mx.getSafeUserId();
     const deviceId = mx.getDeviceId() ?? '';
@@ -81,6 +82,7 @@ export class CallEmbed {
       perParticipantE2EE: room.hasEncryptionStateEvent().toString(),
       lang: 'en-EN',
       theme: themeKind,
+      noiseSuppression: noiseSuppression.toString(),
     });
 
     const widgetUrl = new URL(

src/app/state/callPreferences.ts

@@ -28,10 +28,13 @@ export const makeCallPreferencesAtom = (userId: string): CallPreferencesAtom =>
     storeKey,
     (key) => {
       const v = getLocalStorageItem<CallPreferences>(key, DEFAULT_PREFERENCES);
-      return v;
+      // Never restore camera state — always start with camera off for privacy.
+      // Users can toggle it in the prescreen before joining.
+      return { ...v, video: false };
     },
     (key, value) => {
-      setLocalStorageItem(key, value);
+      // Don't persist video state — always resets to off on next load.
+      setLocalStorageItem(key, { ...value, video: false });
     }
   );
 

src/app/state/hooks/callPreferences.ts

@@ -1,6 +1,8 @@
 import { createContext, useCallback, useContext } from 'react';
 import { useAtom } from 'jotai';
 import { CallPreferences, CallPreferencesAtom } from '../callPreferences';
+import { useSetting } from './settings';
+import { settingsAtom } from '../settings';
 
 const CallPreferencesAtomContext = createContext<CallPreferencesAtom | null>(null);
 export const CallPreferencesProvider = CallPreferencesAtomContext.Provider;
@@ -21,6 +23,7 @@ export const useCallPreferences = (): CallPreferences & {
 } => {
   const callPrefAtom = useCallPreferencesAtom();
   const [pref, setPref] = useAtom(callPrefAtom);
+  const [cameraOnJoin] = useSetting(settingsAtom, 'cameraOnJoin');
 
   const toggleMicrophone = useCallback(() => {
     const microphone = !pref.microphone;
@@ -54,6 +57,7 @@ export const useCallPreferences = (): CallPreferences & {
 
   return {
     ...pref,
+    video: cameraOnJoin ? pref.video : false,
     toggleMicrophone,
     toggleVideo,
     toggleSound,

src/app/state/settings.ts

@@ -46,6 +46,11 @@ export interface Settings {
 
   chatBackground: ChatBackground;
   perMessageProfiles: boolean;
+
+  cameraOnJoin: boolean;
+  callNoiseSuppression: boolean;
+  pttMode: boolean;
+  pttKey: string;
 }
 
 const defaultSettings: Settings = {
@@ -84,6 +89,11 @@ const defaultSettings: Settings = {
 
   chatBackground: 'none',
   perMessageProfiles: false,
+
+  cameraOnJoin: false,
+  callNoiseSuppression: true,
+  pttMode: false,
+  pttKey: 'Space',
 };
 
 export const getSettings = () => {