feat: file variety, user status, DND gate, drag-drop, mentions, link preview, emoji picker, soundboard, ringtone

Attachments
- Video: native <video controls>, decrypted blob, metadata preload
- PDF: collapsible <object> viewer with download + preview toggle
- Generic: file card with lazy decrypt, mime-to-extension map
- MessageBubble dispatch: audio/image/video/pdf/generic by mime
- Composer accept widened from image/* to any; AttachmentPreview renders
  non-images as file cards

User status
- usePeerPresence returns { state, statusMessage } and tracks both fields
  via realtime updates
- ConversationHeader subtitle shows custom status_message when peer is
  online/idle/dnd (with message set); falls back to localized presence
  label; always "Offline" when state === 'offline'
- UserBar: status_message input in dropdown (max 128 chars, save on
  blur/Enter), subtitle uses same precedence as peer view
- AuthContext: auto-flip offline → online on session mount; best-effort
  offline on beforeunload/pagehide; respects explicit idle/dnd/invisible
- i18n: presence.status_placeholder (DE + EN)

DND
- CallUI: incoming ring suppressed when own presence === 'dnd' (outgoing
  rings stay audible — user-initiated)
- CallContext: presenceRef mirrors profile.presenceState, incoming-call
  and missed-call OS notifications skipped under DND
- ConversationsContext already gated message tone + notify

Drag/drop + paste
- Page-root drag handlers feed ingestFiles; overlay shown while dragging
- Textarea onPaste extracts clipboard image items

@mentions in groups
- MentionAutocomplete: keyboard-driven dropdown, arrow/enter/tab/esc
- Composer onChange parses trailing @token, auto-open
- renderBodyWithMentions highlights @username tokens in bubbles

Link previews
- Migration 20260421000003_link_previews.sql (cache table, auth read,
  service-role write via edge function)
- Edge function og-preview: POST {url}, fetches HTML (6s timeout, 1MB
  cap), regex-parses OG/twitter/description, upserts cache
- useLinkPreview hook with in-memory cache + inflight dedup
- LinkPreviewCard rendered from first URL in message body

Emoji picker
- Built-in curated set (~250 emojis) across five categories
- Search by keyword/emoji char/category, recent list persisted in
  localStorage
- Trigger button next to + and voice buttons in composer

Soundboard + ringtone + mic pipeline
- Pulled in (user-authored) SoundboardManagerDialog/Panel/Settings,
  RingtoneSettings, mic pipeline + hotkeys + storage modules
- AuthContext imports updateOwnProfile for presence auto-flip

Fixes
- AttachmentAudio min-width so bubbles don't collapse to 0px on peer
  side
- Focus flicker: visibility/online wake refresh throttled to 30s,
  focus listener dropped, loading flag only on first fetch

apps/desktop/src/components/InCallPanel.tsx

@@ -18,6 +18,7 @@ import { FocusIcon, GridIcon, LockIcon, MaximizeIcon, SpinnerIcon, UsersIcon } f
 import { ParticipantVolumeMenu } from './ParticipantVolumeMenu';
 import { ScreenShareDialog } from './ScreenShareDialog';
 import { ScreenShareViewer } from './ScreenShareViewer';
+import { SoundboardPanel } from './SoundboardPanel';
 
 // Discord-style in-call dock rendered above the message list. Renders three
 // visual modes driven by CallContext.callMode: grid, focus, fullscreen.
@@ -61,6 +62,7 @@ export function InCallPanel({ conversation }: Props) {
     isCameraEnabled,
     isDeafened,
     remoteDeafen,
+    remoteMute,
     remoteScreenShares,
     callMode,
     focusedId,
@@ -77,6 +79,7 @@ export function InCallPanel({ conversation }: Props) {
   const myId = session?.user.id ?? null;
   const activeSpeakers = useActiveSpeakers(room);
   const [shareDialogOpen, setShareDialogOpen] = useState(false);
+  const [soundboardOpen, setSoundboardOpen] = useState(false);
   const [volumeMenu, setVolumeMenu] = useState<
     { userId: string; displayName: string; x: number; y: number } | null
   >(null);
@@ -108,6 +111,7 @@ export function InCallPanel({ conversation }: Props) {
     isMuted,
     isDeafened,
     remoteDeafen,
+    remoteMute,
     isScreenSharing,
     isCameraEnabled,
     remoteSharerIds: new Set(remoteScreenShares.map((s) => s.participantId)),
@@ -150,6 +154,8 @@ export function InCallPanel({ conversation }: Props) {
       }}
       onToggleVideo={() => void toggleCamera()}
       onToggleDeafen={toggleDeafen}
+      onToggleSoundboard={() => setSoundboardOpen((v) => !v)}
+      soundboardOpen={soundboardOpen}
       onHangup={() => void hangup()}
       compact={callMode !== 'fullscreen'}
       glass={callMode === 'fullscreen'}
@@ -197,6 +203,10 @@ export function InCallPanel({ conversation }: Props) {
             onClose={() => setVolumeMenu(null)}
           />
         )}
+        <SoundboardPopover
+          open={soundboardOpen}
+          onClose={() => setSoundboardOpen(false)}
+        />
       </>
     );
   }
@@ -280,10 +290,28 @@ export function InCallPanel({ conversation }: Props) {
           onClose={() => setVolumeMenu(null)}
         />
       )}
+
+      <SoundboardPopover
+        open={soundboardOpen}
+        onClose={() => setSoundboardOpen(false)}
+      />
     </section>
   );
 }
 
+// Fixed-position overlay so the popover sits above both docked + fullscreen
+// call modes without needing a portal or parent-relative anchoring.
+function SoundboardPopover({ open, onClose }: { open: boolean; onClose: () => void }) {
+  if (!open) return null;
+  return (
+    <div className="pointer-events-none fixed inset-x-0 bottom-24 z-50 flex justify-center px-4">
+      <div className="pointer-events-auto">
+        <SoundboardPanel onClose={onClose} />
+      </div>
+    </div>
+  );
+}
+
 // ---------------------------------------------------------------------------
 // Helpers
 // ---------------------------------------------------------------------------
@@ -296,6 +324,7 @@ interface BuildArgs {
   isMuted: boolean;
   isDeafened: boolean;
   remoteDeafen: Record<string, boolean>;
+  remoteMute: Record<string, boolean>;
   isScreenSharing: boolean;
   isCameraEnabled: boolean;
   remoteSharerIds: Set<string>;
@@ -321,6 +350,7 @@ function buildTiles({
   isMuted,
   isDeafened,
   remoteDeafen,
+  remoteMute,
   isScreenSharing,
   isCameraEnabled,
   remoteSharerIds,
@@ -379,7 +409,10 @@ function buildTiles({
       displayName: m.profile?.displayName ?? '?',
       avatarUrl: m.profile?.avatarUrl ?? null,
       self: false,
-      muted: !rp.isMicrophoneEnabled,
+      // Peer's self-reported mute state via data channel. LiveKit's own
+      // `isMicrophoneEnabled` no longer flips on mute since the pipeline
+      // output track stays published. See remoteMute broadcast in CallContext.
+      muted: remoteMute[m.userId] ?? false,
       // Deafen state arrives via LiveKit data channel; see CallContext.
       deafened: remoteDeafen[m.userId] ?? false,
       video: rp.isCameraEnabled,