chore: merge v4.12.1 — security, calling, editor, media fixes

Key v4.12.1 changes merged:
- Security: sanitize-html updated to v2.17.4
- Calling: video calls in DMs/rooms, user avatars during calls, right-click to start
- Calling: IncomingCallListener with ring sound and answer/reject UI
- Editor: list crash fixes (Firefox + empty headings), codeblock filename support
- Media: URL preview hover state, keyboard nav, click-to-open, OGG audio support
- Date: ISO 8601 (YYYY-MM-DD) date format option
- Misc: stable mutual rooms endpoint, Android notification crash fix

Lotus customisations preserved:
- PiP drag/resize, DM call ring notification, PTT, GIF picker, noise suppression
- Poll voting, message forwarding, image captions, location sharing
- Lotus Terminal design theme

src/app/plugins/call/CallEmbed.ts

@@ -51,12 +51,36 @@ export class CallEmbed {
 
   private styleRetryObserver?: MutationObserver;
 
-  static getIntent(dm: boolean, ongoing: boolean): ElementCallIntent {
-    if (ongoing) {
-      return dm ? ElementCallIntent.JoinExistingDM : ElementCallIntent.JoinExisting;
+  static getIntent(dm: boolean, ongoing: boolean, video?: boolean): ElementCallIntent {
+    if (dm && ongoing) {
+      return video ? ElementCallIntent.JoinExistingDM : ElementCallIntent.JoinExistingDMVoice;
+    }
+    if (dm) {
+      return video ? ElementCallIntent.StartCallDM : ElementCallIntent.StartCallDMVoice;
     }
 
-    return dm ? ElementCallIntent.StartCallDM : ElementCallIntent.StartCall;
+    if (ongoing) {
+      return video ? ElementCallIntent.JoinExisting : ElementCallIntent.JoinExistingVoice;
+    }
+    return video ? ElementCallIntent.StartCall : ElementCallIntent.StartCallVoice;
+  }
+
+  static dmCall(intent: ElementCallIntent): boolean {
+    return (
+      intent === ElementCallIntent.JoinExistingDM ||
+      intent === ElementCallIntent.JoinExistingDMVoice ||
+      intent === ElementCallIntent.StartCallDM ||
+      intent === ElementCallIntent.StartCallDMVoice
+    );
+  }
+
+  static startingCall(intent: ElementCallIntent): boolean {
+    return (
+      intent === ElementCallIntent.StartCallDM ||
+      intent === ElementCallIntent.StartCallDMVoice ||
+      intent === ElementCallIntent.StartCall ||
+      intent === ElementCallIntent.StartCallVoice
+    );
   }
 
   static getWidget(
@@ -91,8 +115,13 @@ export class CallEmbed {
       noiseSuppression: noiseSuppression.toString(),
       audio: initialAudio.toString(),
       video: initialVideo.toString(),
+      header: 'none',
     });
 
+    if (!room.isCallRoom() && CallEmbed.startingCall(intent)) {
+      params.append('sendNotificationType', CallEmbed.dmCall(intent) ? 'ring' : 'notification');
+    }
+
     const widgetUrl = new URL(
       `${trimTrailingSlash(import.meta.env.BASE_URL)}/public/element-call/index.html`,
       window.location.origin

src/app/plugins/call/types.ts

@@ -1,6 +1,8 @@
 export enum ElementCallIntent {
   StartCall = 'start_call',
   JoinExisting = 'join_existing',
+  StartCallVoice = 'start_call_voice',
+  JoinExistingVoice = 'join_existing_voice',
   StartCallDM = 'start_call_dm',
   JoinExistingDM = 'join_existing_dm',
   StartCallDMVoice = 'start_call_dm_voice',

src/app/plugins/call/utils.ts

@@ -15,6 +15,8 @@ export function getCallCapabilities(
 
   capabilities.add(MatrixCapabilities.Screenshots);
   capabilities.add(MatrixCapabilities.AlwaysOnScreen);
+  capabilities.add(MatrixCapabilities.MSC4039UploadFile);
+  capabilities.add(MatrixCapabilities.MSC4039DownloadFile);
   capabilities.add(MatrixCapabilities.MSC3846TurnServers);
   capabilities.add(MatrixCapabilities.MSC4157SendDelayedEvent);
   capabilities.add(MatrixCapabilities.MSC4157UpdateDelayedEvent);
@@ -78,19 +80,13 @@ export function getCallCapabilities(
     WidgetEventCapability.forStateEvent(EventDirection.Receive, EventType.RoomCreate).raw
   );
 
-  capabilities.add(
-    WidgetEventCapability.forRoomEvent(
-      EventDirection.Receive,
-      'org.matrix.msc4075.rtc.notification'
-    ).raw
-  );
-
   [
     'io.element.call.encryption_keys',
     'org.matrix.rageshake_request',
     EventType.Reaction,
     EventType.RoomRedaction,
     'io.element.call.reaction',
+    'org.matrix.msc4075.rtc.notification',
     'org.matrix.msc4310.rtc.decline',
   ].forEach((type) => {
     capabilities.add(WidgetEventCapability.forRoomEvent(EventDirection.Send, type).raw);