fix(calls): PTT, deafen hotkey and AFK auto-mute live for the whole call

They were wired inside CallControls, which only renders while the call
room is selected, so navigating away (PiP) or opening the in-call chat on
mobile silently disabled all three — AFK auto-mute exactly when it
mattered. Move them into useCallHotkeys + useAfkAutoMute mounted from the
embed-lifetime CallUtils, gated on joined; CallControls keeps only the
PTT chip (pttActiveAtom).

Also: window blur/focus release the mic only while a PTT key is actually
held, so a deliberate hands-free unmute survives a click into the iframe
(#27); iframe-side listeners re-bind on the iframe load event so they
survive an EC reload (#60). The #23 modifier/interactive guards are
preserved and unit-tested.

Fixes #9
Fixes #27
Fixes #60

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA

src/app/components/CallEmbedProvider.tsx

@@ -45,6 +45,8 @@ import { useMatrixClient } from '../hooks/useMatrixClient';
 import { previewRingtone, startRingtone, unlockRingtoneAudio } from '../utils/ringtones';
 import { useCallMembersChange, useCallSession } from '../hooks/useCall';
 import { useCallJoinLeaveSounds } from '../hooks/useCallJoinLeaveSounds';
+import { useCallHotkeys } from '../hooks/useCallHotkeys';
+import { useAfkAutoMute } from '../hooks/useAfkAutoMute';
 import { useCallQuality } from '../hooks/useCallQuality';
 import { useRemoteAllMuted } from '../hooks/useCallSpeakers';
 import { useRoomAvatar, useRoomName } from '../hooks/useRoomMeta';
@@ -609,9 +611,15 @@ function IncomingCallListener({ callEmbed, joined }: IncomingCallListenerProps)
   );
 }
 
-function CallUtils({ embed }: { embed: CallEmbed }) {
+function CallUtils({ embed, joined }: { embed: CallEmbed; joined: boolean }) {
   const setCallEmbed = useSetAtom(callEmbedAtom);
 
+  // [Gitea #9] PTT/deafen hotkeys and AFK auto-mute are bound here, for the
+  // embed's whole lifetime, rather than in CallControls (which only renders
+  // while the call room is selected) — so they keep working in PiP and behind
+  // the mobile in-call chat. Both are gated on `joined`.
+  useCallHotkeys(embed, joined);
+  useAfkAutoMute(joined ? embed : undefined);
   useCallMemberSoundSync(embed);
   useCallJoinLeaveSounds(embed);
   useCallThemeSync(embed);
@@ -1146,7 +1154,7 @@ export function CallEmbedProvider({ children }: CallEmbedProviderProps) {
 
   return (
     <CallEmbedContextProvider value={callEmbed}>
-      {callEmbed && <CallUtils embed={callEmbed} />}
+      {callEmbed && <CallUtils embed={callEmbed} joined={joined} />}
       <CallEmbedRefContextProvider value={callEmbedRef}>
         <IncomingCallListener callEmbed={callEmbed} joined={joined} />
         {children}