Say outright whether the profile is ours to change

Whether to offer the profile settings was inferred from whether the host
could close Element Call. For a component with no host bridge — the
default — nothing could, so an embedded Element Call let the user edit
the profile of an account that belongs to the host application.

`HostBridge.supportsProfileChanges` states it directly: true standalone,
where Element Call signed the user in itself; false for a widget's host
and for anything embedding the component (which sets it itself, since
the client it hands over is its own). The profile tab and the profile
shortcut follow that. What a host's ability to close us still decides —
what to show after the call ends — is a question about who owns our
lifetime, and stays keyed on `close`.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/room/GroupCallView.tsx

@@ -116,10 +116,8 @@ export const GroupCallView: FC<Props> = ({
   const hostBridge = useHostBridge();
   // A host that can close us is a host that decides when we stop existing, so
   // we neither show our own post-call screens nor assume we have time to
-  // finish what we are doing.
-  // TODO: this reads a capability as a proxy for who owns our lifetime. Worth
-  // finding a more direct way to express it — see the guidance in UrlParams.ts
-  // on naming behaviours rather than situations.
+  // finish what we are doing. (Whose account the user's is, by contrast, is
+  // stated outright: see `HostBridge.supportsProfileChanges`.)
   const hostControlsLifetime = hostBridge.close !== undefined;
 
   const muteAllAudio = useBehavior(muteAllAudio$);

src/room/InCallView.tsx

@@ -329,11 +329,8 @@ export const InCallView: FC<InCallViewProps> = ({
 
   const openProfile = useMemo(
     () =>
-      // A host that can dismiss us is a host that owns the user's account, so
-      // their profile is not ours to edit.
-      // TODO: another use of the close capability as a proxy — see the note in
-      // GroupCallView.
-      hostBridge.close === undefined
+      // The profile is only ours to edit when the account is ours
+      hostBridge.supportsProfileChanges
         ? (): void => {
             setSettingsTab("profile");
             setSettingsOpen(true);