feat: backup/restore, user profile popover, image compress, video blur, wake lock

- backup/restore dialog + user profile popover components
- image compression, video blur, wake lock utilities
- message cache + conversation messages hook refinements
- call context, active speakers, screen share dialog tweaks
- audio + screen share settings persistence
- refreshed app icons (smaller sizes) across all platforms

apps/desktop/package.json

@@ -21,6 +21,7 @@
     "@chat-app/shared": "workspace:*",
     "@chat-app/ui-web": "workspace:*",
     "@livekit/components-react": "^2.9.0",
+    "@livekit/track-processors": "^0.7.2",
     "@supabase/supabase-js": "^2.46.0",
     "@tauri-apps/api": "^2.1.1",
     "@tauri-apps/plugin-fs": "^2.5.0",

apps/desktop/public/favicon.svg

@@ -1,14 +1,7 @@
 <svg viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
-        <defs>
+        <rect x="4" y="4" width="56" height="56" rx="20" fill="#a78bfa"/>
-          <clipPath id="cp02">
+        <path d="M18 46 V22 Q 18 18 22 18 Q 26 18 27 21 L 39 42 Q 40 45 44 45 V22 Q 44 18 40 18"
-            <polygon points="32,5 57,19 57,45 32,59 7,45 7,19"/>
+              fill="none" stroke="#fff" stroke-width="6" stroke-linecap="round" stroke-linejoin="round" opacity="0"/>
-          </clipPath>
+        <path d="M20 46 V22 a3 3 0 0 1 5.5 -1.8 L 40 43 a2 2 0 0 0 4 -1.2 V22 a3 3 0 0 0 -6 0"
-        </defs>
+              fill="none" stroke="#fff" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
-        <polygon points="32,5 57,19 57,45 32,59 7,45 7,19" fill="#2e1065"/>
-        <g clip-path="url(#cp02)">
-          <path d="M-4 32 Q 16 18 32 32 T 68 32 L 68 64 L -4 64 Z" fill="#7c4dff"/>
-          <path d="M-4 32 Q 16 18 32 32 T 68 32" stroke="#a78bfa" stroke-width="2" fill="none"/>
-        </g>
-        <polygon points="32,5 57,19 57,45 32,59 7,45 7,19"
-                 fill="none" stroke="#a78bfa" stroke-width="1.5" opacity="0.4"/>
       </svg>

apps/desktop/src-tauri/icons/source.svg

@@ -1,14 +1,7 @@
 <svg viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg">
-        <defs>
+        <rect x="4" y="4" width="56" height="56" rx="20" fill="#a78bfa"/>
-          <clipPath id="cp02">
+        <path d="M18 46 V22 Q 18 18 22 18 Q 26 18 27 21 L 39 42 Q 40 45 44 45 V22 Q 44 18 40 18"
-            <polygon points="32,5 57,19 57,45 32,59 7,45 7,19"/>
+              fill="none" stroke="#fff" stroke-width="6" stroke-linecap="round" stroke-linejoin="round" opacity="0"/>
-          </clipPath>
+        <path d="M20 46 V22 a3 3 0 0 1 5.5 -1.8 L 40 43 a2 2 0 0 0 4 -1.2 V22 a3 3 0 0 0 -6 0"
-        </defs>
+              fill="none" stroke="#fff" stroke-width="5" stroke-linecap="round" stroke-linejoin="round"/>
-        <polygon points="32,5 57,19 57,45 32,59 7,45 7,19" fill="#2e1065"/>
-        <g clip-path="url(#cp02)">
-          <path d="M-4 32 Q 16 18 32 32 T 68 32 L 68 64 L -4 64 Z" fill="#7c4dff"/>
-          <path d="M-4 32 Q 16 18 32 32 T 68 32" stroke="#a78bfa" stroke-width="2" fill="none"/>
-        </g>
-        <polygon points="32,5 57,19 57,45 32,59 7,45 7,19"
-                 fill="none" stroke="#a78bfa" stroke-width="1.5" opacity="0.4"/>
       </svg>

apps/desktop/src/components/BackupRestoreDialog.tsx

@@ -0,0 +1,86 @@
+import { useEffect } from 'react';
+
+import { DeviceRestore } from './DeviceRestore';
+import { AlertIcon, ShieldIcon, XIcon } from './icons';
+
+interface Props {
+  open: boolean;
+  userId: string;
+  onClose: () => void;
+}
+
+// Modal wrapper around DeviceRestore for the already-signed-in case. A
+// successful restore swaps the local device-identity for the one embedded
+// in the backup string — the app then hard-reloads so every hook
+// re-initialises against the restored keys (simpler than invalidating
+// supabase-realtime subscriptions, stronghold caches, livekit rooms, etc.
+// individually).
+export function BackupRestoreDialog({ open, userId, onClose }: Props) {
+  useEffect(() => {
+    if (!open) return;
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') onClose();
+    };
+    window.addEventListener('keydown', onKey);
+    const prev = document.body.style.overflow;
+    document.body.style.overflow = 'hidden';
+    return () => {
+      window.removeEventListener('keydown', onKey);
+      document.body.style.overflow = prev;
+    };
+  }, [open, onClose]);
+
+  if (!open) return null;
+
+  return (
+    <div
+      role="dialog"
+      aria-modal="true"
+      aria-label="Backup wiederherstellen"
+      className="fixed inset-0 z-50 flex items-start justify-center overflow-y-auto bg-black/60 p-6 backdrop-blur-sm"
+      onClick={onClose}
+    >
+      <div
+        onClick={(e) => e.stopPropagation()}
+        className="flex w-full max-w-md flex-col gap-4"
+      >
+        <div className="flex items-center justify-between rounded-lg border border-white/10 bg-ink-900/70 p-3 backdrop-blur-xl">
+          <div className="flex items-center gap-2">
+            <ShieldIcon className="h-4 w-4 text-brand-300" />
+            <h3 className="text-sm font-semibold text-white">
+              Gerät aus Backup wiederherstellen
+            </h3>
+          </div>
+          <button
+            type="button"
+            onClick={onClose}
+            aria-label="Schließen"
+            className="flex h-8 w-8 cursor-pointer items-center justify-center rounded-lg text-neutral-400 transition hover:bg-white/10 hover:text-white"
+          >
+            <XIcon className="h-4 w-4" />
+          </button>
+        </div>
+
+        <div className="flex items-start gap-2 rounded-lg border border-amber-500/30 bg-amber-500/10 p-3 text-xs text-amber-100">
+          <AlertIcon className="mt-0.5 h-4 w-4 shrink-0 text-amber-300" />
+          <p className="min-w-0 flex-1">
+            Restore ersetzt das aktuelle Gerät durch das aus dem Backup.
+            Die App lädt danach neu. Nachrichten, die auf diesem Gerät seit
+            dem Backup eingegangen sind, sind erst wieder lesbar, nachdem
+            Peer-Geräte den Conversation-Key erneut für die wiederhergestellte
+            Device-ID wrappen.
+          </p>
+        </div>
+
+        <DeviceRestore
+          userId={userId}
+          onRestored={() => {
+            // Hard reload — cleanest way to reset every hook, supabase
+            // realtime channel, stronghold handle, and cached state.
+            window.location.reload();
+          }}
+        />
+      </div>
+    </div>
+  );
+}

apps/desktop/src/components/MessageBubble.tsx

@@ -56,6 +56,8 @@ interface Props {
   onReply?: (m: DecryptedMessage) => void;
   /** Hover action: parent opens forward dialog for current message. */
   onForward?: (m: DecryptedMessage) => void;
+  /** Click on the message's avatar surfaces the author's profile card. */
+  onAvatarClick?: (userId: string, ev: React.MouseEvent) => void;
   /** Highlighted state — set briefly after a jump. */
   highlighted?: boolean;
 }
@@ -76,6 +78,7 @@ export function MessageBubble({
   onJumpToMessage,
   onReply,
   onForward,
+  onAvatarClick,
   highlighted = false,
 }: Props) {
   const { t } = useTranslation(['app']);
@@ -97,6 +100,47 @@ export function MessageBubble({
   const withinEditWindow = age < EDIT_WINDOW_MS;
   const bodyText = initialText;
   const attachments = initialAttachments;
+
+  // /tempmsg ephemeral window. expireMs embedded in plaintext JSON; sender
+  // fires the soft-delete when the clock runs out. Receivers just watch
+  // the deletedAt flip via realtime.
+  const expireMs = parsed.kind === 'text' ? parsed.expireMs : undefined;
+  const [tickNow, setTickNow] = useState<number>(() => Date.now());
+  useEffect(() => {
+    if (expireMs === undefined) return;
+    const id = window.setInterval(() => setTickNow(Date.now()), 1000);
+    return () => window.clearInterval(id);
+  }, [expireMs]);
+  const msLeft =
+    expireMs !== undefined
+      ? Math.max(0, expireMs - (tickNow - createdAt.getTime()))
+      : null;
+
+  useEffect(() => {
+    if (!mine) return;
+    if (expireMs === undefined) return;
+    if (message.deletedAt) return;
+    const remaining = Math.max(0, expireMs - age);
+    const timer = window.setTimeout(() => {
+      void softDeleteMessage(supabase, message.id).catch((err: unknown) => {
+        console.warn('ephemeral auto-delete failed', err);
+      });
+    }, remaining);
+    return () => window.clearTimeout(timer);
+  }, [mine, expireMs, age, message.id, message.deletedAt]);
+
+  // Receiver-side auto-hide when the expiry window elapses even if the
+  // sender's delete hasn't propagated yet (network hiccup, offline-sender).
+  const [localExpired, setLocalExpired] = useState<boolean>(
+    msLeft !== null && msLeft <= 0,
+  );
+  useEffect(() => {
+    if (expireMs === undefined) return;
+    if (localExpired) return;
+    const remaining = Math.max(0, expireMs - age);
+    const t = window.setTimeout(() => setLocalExpired(true), remaining);
+    return () => window.clearTimeout(t);
+  }, [expireMs, age, localExpired]);
   const canEdit =
     parsed.kind === 'text' &&
     mine &&
@@ -181,13 +225,16 @@ export function MessageBubble({
     [onToggleReaction],
   );
 
-  if (message.deletedAt) {
+  if (message.deletedAt || localExpired) {
     return (
       <div className={'flex items-end gap-2 ' + (mine ? 'flex-row-reverse' : '')}>
         <AvatarSlot
           show={isLastOfRun}
           url={senderAvatarUrl ?? null}
           displayName={senderDisplayName ?? null}
+          {...(onAvatarClick
+            ? { onClick: (ev: React.MouseEvent) => onAvatarClick(message.senderId, ev) }
+            : {})}
         />
         <div className="max-w-[calc(70%-2.5rem)] rounded-2xl border border-line bg-surface-2 px-3.5 py-1.5 text-xs italic text-fg-muted">
           {t('app:chats.deleted')}
@@ -274,23 +321,30 @@ export function MessageBubble({
                 type="button"
                 onClick={() => onJumpToMessage?.(quoted.id)}
                 className={
-                  'mb-1.5 flex w-full cursor-pointer items-stretch gap-2 rounded-md px-2 py-1.5 text-left text-xs transition hover:opacity-90 ' +
+                  'mb-1.5 flex w-full cursor-pointer items-stretch gap-2 rounded-md pl-2 pr-2.5 py-1.5 text-left text-xs transition hover:brightness-110 hover:shadow-sm ' +
                   (mine
-                    ? 'bg-white/15 text-accent-fg/90'
+                    ? 'bg-white/10 text-accent-fg/90'
-                    : 'bg-surface-2 text-fg-muted')
+                    : 'bg-surface-2/80 text-fg-muted ring-1 ring-inset ring-line')
                 }
               >
                 <span
                   aria-hidden="true"
                   className={
-                    'w-0.5 shrink-0 rounded-full ' + (mine ? 'bg-white/50' : 'bg-accent')
+                    '-ml-1 w-1 shrink-0 rounded-full ' +
+                    (mine ? 'bg-white/70' : 'bg-accent')
                   }
                 />
-                <span className="min-w-0 flex-1">
+                <span className="min-w-0 flex-1 pl-1">
-                  <span className={'block truncate font-semibold ' + (mine ? '' : 'text-fg')}>
+                  <span
-                    {quoted.senderName}
+                    className={
+                      'flex items-center gap-1 truncate text-[11px] font-semibold ' +
+                      (mine ? 'text-accent-fg' : 'text-accent')
+                    }
+                  >
+                    <ReplyIcon className="h-3 w-3 shrink-0" />
+                    <span className="truncate">{quoted.senderName}</span>
                   </span>
-                  <span className="block truncate italic opacity-90">
+                  <span className="mt-0.5 block truncate opacity-80">
                     {quoted.deleted
                       ? t('app:chats.deleted')
                       : quoted.isAttachment && !quoted.snippet
@@ -337,6 +391,17 @@ export function MessageBubble({
               {message.editedAt && !message.deletedAt && (
                 <span className="italic">· {t('app:chats.edited')}</span>
               )}
+              {msLeft !== null && msLeft > 0 && (
+                <span
+                  className={
+                    'inline-flex items-center gap-1 rounded-full px-1.5 py-0.5 text-[9px] font-semibold uppercase tracking-wider ' +
+                    (mine ? 'bg-white/20' : 'bg-rose-500/15 text-rose-600 dark:text-rose-300')
+                  }
+                  title="Selbstzerstörung"
+                >
+                  ⏱ {Math.ceil(msLeft / 1000)}s
+                </span>
+              )}
             </div>
           </div>
         )}
@@ -457,14 +522,29 @@ function AvatarSlot({
   show,
   url,
   displayName,
+  onClick,
 }: {
   show: boolean;
   url: string | null;
   displayName: string | null;
+  onClick?: (ev: React.MouseEvent) => void;
 }) {
   if (!show) {
     return <div aria-hidden="true" className="h-8 w-8 shrink-0" />;
   }
+  if (onClick) {
+    return (
+      <button
+        type="button"
+        data-user-popover-trigger
+        onClick={onClick}
+        className="shrink-0 cursor-pointer rounded-full transition hover:ring-2 hover:ring-accent/50 focus:outline-none focus-visible:ring-2 focus-visible:ring-accent/50"
+        aria-label={displayName ?? 'Profil'}
+      >
+        <Avatar url={url} displayName={displayName ?? ''} className="h-8 w-8 text-xs" />
+      </button>
+    );
+  }
   return (
     <Avatar
       url={url}

apps/desktop/src/components/ScreenShareDialog.tsx

@@ -7,6 +7,7 @@ import {
   getScreenShareSettings,
   PRESET_ORDER,
   type ScreenSharePreset,
+  updateScreenShareSettings,
 } from '../lib/screenShareSettings';
 import {
   MonitorShareIcon,
@@ -42,6 +43,7 @@ export function ScreenShareDialog({ open, onClose, onStart }: Props) {
   const [surface, setSurface] = useState<DisplaySurfaceHint>(initial.displaySurface);
   const [preset, setPreset] = useState<ScreenSharePreset>(initial.preset);
   const [framerate, setFramerate] = useState<number | null>(initial.framerateOverride);
+  const [includeAudio, setIncludeAudio] = useState<boolean>(initial.includeSystemAudio);
   const [busy, setBusy] = useState(false);
   const [error, setError] = useState<string | null>(null);
 
@@ -51,6 +53,9 @@ export function ScreenShareDialog({ open, onClose, onStart }: Props) {
     setBusy(true);
     setError(null);
     try {
+      // Persist the audio choice alongside the other picker prefs so the
+      // upstream startScreenShare picks it up on its settings read.
+      updateScreenShareSettings({ includeSystemAudio: includeAudio });
       await onStart({ preset, displaySurface: surface, framerate });
       onClose();
     } catch (err: unknown) {
@@ -165,6 +170,30 @@ export function ScreenShareDialog({ open, onClose, onStart }: Props) {
             </p>
           </div>
 
+          <div>
+            <label className="flex cursor-pointer items-start gap-2 rounded-lg border border-line bg-surface-2 px-3 py-2 text-xs hover:bg-surface">
+              <input
+                type="checkbox"
+                checked={includeAudio}
+                onChange={(e) => setIncludeAudio(e.target.checked)}
+                className="mt-0.5 accent-accent"
+              />
+              <span className="min-w-0 flex-1">
+                <span className="block font-semibold text-fg">
+                  {t('app:call.share_system_audio', {
+                    defaultValue: 'System-Sound mit übertragen',
+                  })}
+                </span>
+                <span className="mt-0.5 block text-[11px] text-fg-muted">
+                  {t('app:call.share_system_audio_hint', {
+                    defaultValue:
+                      '"Go Live" — Systemsound wird mitgesendet. Auf macOS braucht das extra Berechtigungen; wird sonst stumm geteilt.',
+                  })}
+                </span>
+              </span>
+            </label>
+          </div>
+
           {error && (
             <p role="alert" className="text-sm text-rose-600 dark:text-rose-300">
               {error}

apps/desktop/src/components/UserProfilePopover.tsx

@@ -0,0 +1,126 @@
+import type { ProfileBrief } from '@chat-app/shared/friends';
+import { useEffect } from 'react';
+import { createPortal } from 'react-dom';
+
+import { usePeerPresence } from '../lib/usePeerPresence';
+import { Avatar } from './Avatar';
+
+interface Props {
+  userId: string;
+  profile: ProfileBrief | null;
+  x: number;
+  y: number;
+  onClose: () => void;
+  onStartDm?: (userId: string) => void;
+}
+
+const PRESENCE_DOT: Record<string, string> = {
+  online: 'bg-emerald-500',
+  idle: 'bg-amber-400',
+  dnd: 'bg-rose-500',
+  invisible: 'bg-neutral-500',
+  offline: 'bg-neutral-400 dark:bg-neutral-600',
+};
+
+const CARD_W = 280;
+const CARD_H = 180;
+
+// Hover/click card surfaced from avatars around the app. Shows display name,
+// @handle, presence state + status message, plus a DM-start button when
+// the clicked profile isn't the caller.
+export function UserProfilePopover({
+  userId,
+  profile,
+  x,
+  y,
+  onClose,
+  onStartDm,
+}: Props) {
+  // Subscribe to the same presence feed that the conversation header uses,
+  // so status updates flow in live.
+  const presence = usePeerPresence(userId);
+
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') onClose();
+    };
+    const onDown = (e: MouseEvent) => {
+      const t = e.target as HTMLElement | null;
+      if (t?.closest('[data-user-popover]')) return;
+      if (t?.closest('[data-user-popover-trigger]')) return;
+      onClose();
+    };
+    window.addEventListener('keydown', onKey);
+    window.addEventListener('mousedown', onDown);
+    return () => {
+      window.removeEventListener('keydown', onKey);
+      window.removeEventListener('mousedown', onDown);
+    };
+  }, [onClose]);
+
+  const left = Math.min(Math.max(8, x), window.innerWidth - CARD_W - 8);
+  const top = Math.min(Math.max(8, y), window.innerHeight - CARD_H - 8);
+
+  const displayName = profile?.displayName ?? '?';
+  const username = profile?.username ?? '';
+  const state = presence?.state ?? 'offline';
+  const showPresence = state !== 'invisible';
+  const statusMessage = presence?.statusMessage?.trim() ?? '';
+
+  return createPortal(
+    <div
+      data-user-popover
+      role="dialog"
+      aria-label={displayName}
+      style={{ left, top, width: CARD_W }}
+      className="fixed z-[80] flex flex-col gap-3 rounded-xl border border-line bg-surface-2/95 p-4 shadow-xl backdrop-blur-md"
+    >
+      <div className="flex items-center gap-3">
+        <div className="relative">
+          <Avatar
+            url={profile?.avatarUrl ?? null}
+            displayName={displayName}
+            className="h-14 w-14 text-lg"
+          />
+          {showPresence && (
+            <span
+              aria-hidden="true"
+              className={
+                'absolute -bottom-0.5 -right-0.5 h-3.5 w-3.5 rounded-full ring-2 ring-surface-2 ' +
+                (PRESENCE_DOT[state] ?? PRESENCE_DOT.offline)
+              }
+            />
+          )}
+        </div>
+        <div className="min-w-0 flex-1">
+          <p className="truncate font-display text-base font-semibold text-fg">
+            {displayName}
+          </p>
+          {username && (
+            <p className="truncate text-xs text-fg-muted">@{username}</p>
+          )}
+        </div>
+      </div>
+
+      {statusMessage && state !== 'offline' && (
+        <p className="rounded-md bg-surface-3 px-2.5 py-1.5 text-xs italic text-fg-muted">
+          {statusMessage}
+        </p>
+      )}
+
+      {onStartDm && (
+        <button
+          type="button"
+          onClick={() => {
+            onStartDm(userId);
+            onClose();
+          }}
+          className="inline-flex cursor-pointer items-center justify-center rounded-md bg-accent px-3 py-1.5 text-xs font-semibold text-accent-fg transition hover:brightness-110"
+        >
+          Nachricht senden
+        </button>
+      )}
+    </div>,
+    document.body,
+  );
+}

apps/desktop/src/components/icons.tsx

@@ -519,86 +519,53 @@ export function AddUserIcon(props: IconProps) {
   );
 }
 
+// Soft-N mark: rounded-square violet tile with a stylised "N" glyph. Used
+// wherever the app needs a standalone icon (sidebar rail, auth screen,
+// favicon). Colour decisions sit inside the SVG so consumers just size the
+// element via `className`.
 export function LogoMark(props: IconProps) {
   return (
     <svg
       xmlns="http://www.w3.org/2000/svg"
       viewBox="0 0 64 64"
-      fill="none"
       aria-hidden="true"
       {...props}
     >
-      <defs>
+      <rect x="4" y="4" width="56" height="56" rx="20" fill="#a78bfa" />
-        <clipPath id="logo-hex-clip">
-          <polygon points="32,5 57,19 57,45 32,59 7,45 7,19" />
-        </clipPath>
-      </defs>
-      <polygon
-        points="32,5 57,19 57,45 32,59 7,45 7,19"
-        fill="#2e1065"
-      />
-      <g clipPath="url(#logo-hex-clip)">
       <path
-          d="M-4 32 Q 16 18 32 32 T 68 32 L 68 64 L -4 64 Z"
+        d="M20 46 V22 a3 3 0 0 1 5.5 -1.8 L 40 43 a2 2 0 0 0 4 -1.2 V22 a3 3 0 0 0 -6 0"
-          fill="#7c4dff"
-        />
-        <path
-          d="M-4 32 Q 16 18 32 32 T 68 32"
-          stroke="#a78bfa"
-          strokeWidth="2"
         fill="none"
-        />
+        stroke="#fff"
-      </g>
+        strokeWidth="5"
-      <polygon
+        strokeLinecap="round"
-        points="32,5 57,19 57,45 32,59 7,45 7,19"
+        strokeLinejoin="round"
-        fill="none"
-        stroke="#a78bfa"
-        strokeWidth="1.5"
-        opacity="0.4"
       />
     </svg>
   );
 }
 
-// Full lockup: hex icon + "Netralax" wordmark. `tone` decides text colour:
+// Full lockup: soft-N mark + "Netralax" wordmark. `tone` decides text colour:
-// "dark" = white text (use on dark background), "light" = black text.
+// "dark" = white text (use on dark background), "light" = near-black.
 export function LogoLockup({
   tone = 'dark',
   ...props
 }: IconProps & { tone?: 'dark' | 'light' }) {
-  const textFill = tone === 'dark' ? '#ffffff' : '#0F172A';
+  const textFill = tone === 'dark' ? '#ffffff' : '#14121c';
   return (
     <svg
       xmlns="http://www.w3.org/2000/svg"
       viewBox="0 0 260 64"
-      fill="none"
       aria-hidden="true"
       {...props}
     >
-      <defs>
+      <rect x="4" y="4" width="56" height="56" rx="20" fill="#a78bfa" />
-        <clipPath id="logo-lockup-hex-clip">
-          <polygon points="32,5 57,19 57,45 32,59 7,45 7,19" />
-        </clipPath>
-      </defs>
-      <polygon points="32,5 57,19 57,45 32,59 7,45 7,19" fill="#2e1065" />
-      <g clipPath="url(#logo-lockup-hex-clip)">
       <path
-          d="M-4 32 Q 16 18 32 32 T 68 32 L 68 64 L -4 64 Z"
+        d="M20 46 V22 a3 3 0 0 1 5.5 -1.8 L 40 43 a2 2 0 0 0 4 -1.2 V22 a3 3 0 0 0 -6 0"
-          fill="#7c4dff"
-        />
-        <path
-          d="M-4 32 Q 16 18 32 32 T 68 32"
-          stroke="#a78bfa"
-          strokeWidth="2"
         fill="none"
-        />
+        stroke="#fff"
-      </g>
+        strokeWidth="5"
-      <polygon
+        strokeLinecap="round"
-        points="32,5 57,19 57,45 32,59 7,45 7,19"
+        strokeLinejoin="round"
-        fill="none"
-        stroke="#a78bfa"
-        strokeWidth="1.5"
-        opacity="0.4"
       />
       <text
         x="78"

apps/desktop/src/context/CallContext.tsx

@@ -30,6 +30,7 @@ import {
 import { useAuth } from './AuthContext';
 import { useConversationsContext } from './ConversationsContext';
 import { playEndBeep, playJoinBeep, playLeaveBeep } from '../lib/callSounds';
+import { setCallWakeLock } from '../lib/wakeLock';
 import { notify } from '../lib/osNotify';
 import {
   isTauriRuntime,
@@ -40,8 +41,13 @@ import { getPttSettings, subscribePttSettings } from '../lib/pttSettings';
 import {
   getAudioQualityParams,
   getAudioSettings,
+  subscribeAudioSettings,
   updateAudioSettings,
 } from '../lib/audioSettings';
+import {
+  applyBackgroundBlurToLocal,
+  removeBackgroundBlurFromLocal,
+} from '../lib/videoBlur';
 import {
   createCallE2EE,
   getCallE2EESettings,
@@ -492,14 +498,14 @@ export function CallProvider({ children }: { children: ReactNode }) {
 
       r.on(RoomEvent.ParticipantConnected, () => {
         setRemoteParticipants(Array.from(r.remoteParticipants.values()));
-        void playJoinBeep();
+        if (presenceRef.current !== 'dnd') void playJoinBeep();
         markConnectedIfReady(r, conversationId, mediaKind, callId);
       });
 
       r.on(RoomEvent.ParticipantDisconnected, () => {
         const remaining = Array.from(r.remoteParticipants.values());
         setRemoteParticipants(remaining);
-        void playLeaveBeep();
+        if (presenceRef.current !== 'dnd') void playLeaveBeep();
         // Alone in the room while connected — start the solo-timeout.
         if (
           stateRef.current.kind === 'connected' &&
@@ -627,7 +633,11 @@ export function CallProvider({ children }: { children: ReactNode }) {
         setIsE2EEActive(false);
       }
       try {
-        const inputId = getAudioSettings().inputDeviceId;
+        const audioPrefs = getAudioSettings();
+        const inputId = audioPrefs.inputDeviceId;
+        // Noise suppression: user-preference wins over the quality preset so
+        // hifi-mode users can still enable NS when they need to cut room hum.
+        const nsEffective = audioPrefs.noiseSuppression && aParams.noiseSuppression;
         // Grab the raw mic ourselves instead of going through LiveKit's
         // setMicrophoneEnabled. The resulting MediaStreamTrack is routed
         // through createMicPipeline, which mixes in soundboard buffers and
@@ -636,7 +646,7 @@ export function CallProvider({ children }: { children: ReactNode }) {
         const rawStream = await navigator.mediaDevices.getUserMedia({
           audio: {
             echoCancellation: aParams.echoCancellation,
-            noiseSuppression: aParams.noiseSuppression,
+            noiseSuppression: nsEffective,
             autoGainControl: aParams.autoGainControl,
             channelCount: aParams.stereo ? 2 : 1,
             sampleRate: aParams.sampleRateHz,
@@ -947,7 +957,10 @@ export function CallProvider({ children }: { children: ReactNode }) {
 
       try {
         await lp.setScreenShareEnabled(true, {
-          audio: false,
+          // "Go live" mode — capture system audio alongside the screen when
+          // the user opted in. On hosts that can't fulfil the request the
+          // browser quietly drops it; peers just get video-only, no error.
+          audio: settings.includeSystemAudio,
           ...(ssParams.dims
             ? {
                 resolution: {
@@ -1033,6 +1046,9 @@ export function CallProvider({ children }: { children: ReactNode }) {
     try {
       await lp.setCameraEnabled(nextOn);
       setIsCameraEnabled(nextOn);
+      if (nextOn && getAudioSettings().videoBackgroundBlur) {
+        void applyBackgroundBlurToLocal(lp);
+      }
     } catch (err: unknown) {
       console.error('setCameraEnabled failed', err);
       // Permission denied / no camera — keep state in sync with actual
@@ -1041,6 +1057,23 @@ export function CallProvider({ children }: { children: ReactNode }) {
     }
   }, []);
 
+  // Live-toggle the background-blur processor when the settings flag flips.
+  // Acquiring the MediaPipe model is deferred until first activation to
+  // avoid the 1.5MB download on users who never enable blur.
+  useEffect(() => {
+    return subscribeAudioSettings((s) => {
+      const r = roomRef.current;
+      if (!r) return;
+      const lp = r.localParticipant;
+      if (!lp.isCameraEnabled) return;
+      if (s.videoBackgroundBlur) {
+        void applyBackgroundBlurToLocal(lp);
+      } else {
+        void removeBackgroundBlurFromLocal(lp);
+      }
+    });
+  }, []);
+
   // --- Push-to-talk ------------------------------------------------------
   // While PTT is active + we're in a connected call, the mic is held off
   // except while the configured key is pressed. Under Tauri we also register
@@ -1337,11 +1370,13 @@ export function CallProvider({ children }: { children: ReactNode }) {
       // to the pipeline. It disconnects the old source, stops the old track,
       // and rewires micGain onto the new source — the published track stays
       // stable so peers don't see a republish.
-      const aParams = getAudioQualityParams(getAudioSettings().quality);
+      const audioPrefs = getAudioSettings();
+      const aParams = getAudioQualityParams(audioPrefs.quality);
+      const nsEffective = audioPrefs.noiseSuppression && aParams.noiseSuppression;
       const newStream = await navigator.mediaDevices.getUserMedia({
         audio: {
           echoCancellation: aParams.echoCancellation,
-          noiseSuppression: aParams.noiseSuppression,
+          noiseSuppression: nsEffective,
           autoGainControl: aParams.autoGainControl,
           channelCount: aParams.stereo ? 2 : 1,
           sampleRate: aParams.sampleRateHz,
@@ -1393,6 +1428,17 @@ export function CallProvider({ children }: { children: ReactNode }) {
     }
   }, [state.kind]);
 
+  // Hold the screen awake while a call is live so long sessions don't get
+  // dropped by display-sleep / OS power-save. Released the moment the call
+  // ends or errors out.
+  useEffect(() => {
+    const callActive =
+      state.kind === 'connected' ||
+      state.kind === 'connecting' ||
+      state.kind === 'outgoing';
+    void setCallWakeLock(callActive);
+  }, [state.kind]);
+
   // Global Esc: drop out of fullscreen cinema back to grid while in an active
   // call. Doesn't hangup and doesn't fire when other dialogs would consume it.
   useEffect(() => {

apps/desktop/src/lib/audioSettings.ts

@@ -16,12 +16,27 @@ export interface AudioSettings {
   // Preferred output (speaker/headphone) deviceId. null = system default.
   // Applied to every <audio> element we attach via HTMLMediaElement.setSinkId.
   outputDeviceId: string | null;
+  // RMS threshold (0..1) for the "is this participant talking" ring. Lower =
+  // more sensitive. Default 0.03 catches soft speech without lighting up on
+  // keyboard noise. Users on quiet mics can lower; users in noisy rooms bump up.
+  voiceThreshold: number;
+  // Per-publish DSP toggle. Off lets hifi-style music go through unmodified;
+  // on cleans up voice when the quality preset doesn't already imply it.
+  // Defaults to "follow the quality preset".
+  noiseSuppression: boolean;
+  // Background blur on the local camera track. Lazy — requires
+  // @livekit/track-processors + its MediaPipe selfie-segmentation model
+  // (~1.5MB) which downloads on first activation.
+  videoBackgroundBlur: boolean;
 }
 
 const DEFAULTS: AudioSettings = {
   quality: 'voice',
   inputDeviceId: null,
   outputDeviceId: null,
+  voiceThreshold: 0.03,
+  noiseSuppression: true,
+  videoBackgroundBlur: false,
 };
 
 export interface AudioQualityParams {
@@ -80,6 +95,7 @@ function read(): AudioSettings {
       return cached;
     }
     const parsed = JSON.parse(raw) as Partial<AudioSettings>;
+    const rawThreshold = typeof parsed.voiceThreshold === 'number' ? parsed.voiceThreshold : NaN;
     cached = {
       quality: isQuality(parsed.quality) ? parsed.quality : DEFAULTS.quality,
       inputDeviceId:
@@ -90,6 +106,18 @@ function read(): AudioSettings {
         typeof parsed.outputDeviceId === 'string' && parsed.outputDeviceId.length > 0
           ? parsed.outputDeviceId
           : DEFAULTS.outputDeviceId,
+      voiceThreshold:
+        Number.isFinite(rawThreshold) && rawThreshold >= 0.005 && rawThreshold <= 0.2
+          ? rawThreshold
+          : DEFAULTS.voiceThreshold,
+      noiseSuppression:
+        typeof parsed.noiseSuppression === 'boolean'
+          ? parsed.noiseSuppression
+          : DEFAULTS.noiseSuppression,
+      videoBackgroundBlur:
+        typeof parsed.videoBackgroundBlur === 'boolean'
+          ? parsed.videoBackgroundBlur
+          : DEFAULTS.videoBackgroundBlur,
     };
     return cached;
   } catch {

apps/desktop/src/lib/imageCompress.ts

@@ -0,0 +1,57 @@
+// Client-side image compression before upload. Downscales huge photos
+// (phone cameras regularly emit 4000×3000+ at 5MB+) to a size that
+// actually makes sense for chat display. Preserves aspect ratio.
+//
+// Skips animated formats (gif/apng/webp) to keep motion, and skips
+// already-small files to avoid useless re-encode overhead.
+
+const MAX_DIM = 2048;
+const TARGET_QUALITY = 0.85;
+const SKIP_BELOW_BYTES = 512 * 1024; // 512KB — not worth re-encoding
+const ANIMATED_MIME = /^image\/(gif|apng|webp)$/;
+
+export async function compressImage(file: File): Promise<File> {
+  if (!file.type.startsWith('image/')) return file;
+  if (ANIMATED_MIME.test(file.type)) return file;
+  if (file.size < SKIP_BELOW_BYTES) return file;
+  if (typeof createImageBitmap !== 'function') return file;
+  if (typeof OffscreenCanvas !== 'function') return file;
+
+  try {
+    const bitmap = await createImageBitmap(file);
+    const largest = Math.max(bitmap.width, bitmap.height);
+    const scale = largest > MAX_DIM ? MAX_DIM / largest : 1;
+    const w = Math.max(1, Math.round(bitmap.width * scale));
+    const h = Math.max(1, Math.round(bitmap.height * scale));
+    const canvas = new OffscreenCanvas(w, h);
+    const ctx = canvas.getContext('2d');
+    if (!ctx) {
+      bitmap.close();
+      return file;
+    }
+    ctx.drawImage(bitmap, 0, 0, w, h);
+    bitmap.close();
+    const blob = await canvas.convertToBlob({
+      type: 'image/webp',
+      quality: TARGET_QUALITY,
+    });
+    // If the re-encoded blob is actually larger (small PNGs can expand as
+    // WebP), keep the original.
+    if (blob.size >= file.size) return file;
+    const name = renameToWebp(file.name);
+    return new File([blob], name, { type: 'image/webp', lastModified: file.lastModified });
+  } catch (err: unknown) {
+    console.warn('compressImage failed — keeping original', err);
+    return file;
+  }
+}
+
+function renameToWebp(original: string): string {
+  const dot = original.lastIndexOf('.');
+  const base = dot > 0 ? original.slice(0, dot) : original;
+  return base + '.webp';
+}
+
+export async function compressImages(files: File[]): Promise<File[]> {
+  return Promise.all(files.map((f) => compressImage(f)));
+}

apps/desktop/src/lib/messageCache.ts

@@ -54,6 +54,44 @@ async function loadDb(): Promise<Database | null> {
     await db.execute(
       'CREATE INDEX IF NOT EXISTS idx_msgs_conv_created ON messages(conversation_id, created_at);',
     );
+    // FTS5 virtual table for instant full-text search across the cache.
+    // Keeps only the searchable text columns (plaintext + sender), keyed
+    // by the message id so we can join back to the main row. Triggers
+    // mirror inserts/updates/deletes so the index never drifts.
+    //
+    // Falls back gracefully on FTS5-less builds: the IF NOT EXISTS keeps
+    // the call idempotent, and the surrounding try/catch already handles
+    // a CREATE failure by skipping the whole cache.
+    try {
+      await db.execute(
+        `CREATE VIRTUAL TABLE IF NOT EXISTS messages_fts USING fts5(
+          message_id UNINDEXED,
+          conversation_id UNINDEXED,
+          plaintext,
+          tokenize = 'unicode61 remove_diacritics 2'
+        );`,
+      );
+      await db.execute(
+        `CREATE TRIGGER IF NOT EXISTS messages_ai AFTER INSERT ON messages BEGIN
+           INSERT INTO messages_fts (message_id, conversation_id, plaintext)
+           VALUES (new.id, new.conversation_id, COALESCE(new.plaintext, ''));
+         END;`,
+      );
+      await db.execute(
+        `CREATE TRIGGER IF NOT EXISTS messages_ad AFTER DELETE ON messages BEGIN
+           DELETE FROM messages_fts WHERE message_id = old.id;
+         END;`,
+      );
+      await db.execute(
+        `CREATE TRIGGER IF NOT EXISTS messages_au AFTER UPDATE ON messages BEGIN
+           DELETE FROM messages_fts WHERE message_id = old.id;
+           INSERT INTO messages_fts (message_id, conversation_id, plaintext)
+           VALUES (new.id, new.conversation_id, COALESCE(new.plaintext, ''));
+         END;`,
+      );
+    } catch (err: unknown) {
+      console.warn('FTS5 init failed — search falls back to in-memory scan', err);
+    }
     return db;
   } catch (err: unknown) {
     console.warn('messageCache init failed — falling back to memory-only', err);
@@ -157,6 +195,54 @@ export async function deleteCachedMessage(id: string): Promise<void> {
   }
 }
 
+// Full-text search across cached messages. Returns rows in newest-first
+// order; caller maps to DecryptedMessage. Empty result on cache-miss or
+// FTS5 not available — caller should fall back to in-memory regex.
+export async function searchCachedMessages(
+  conversationId: string,
+  query: string,
+  limit = 200,
+): Promise<DecryptedMessage[]> {
+  const db = await getDb();
+  if (!db) return [];
+  const trimmed = query.trim();
+  if (trimmed.length === 0) return [];
+  // Sanitize for FTS5 MATCH syntax. Strip quotes + control chars; wrap in
+  // an OR over each token with a trailing wildcard so partial words match.
+  // Hyphens + colons are FTS5 operators so we drop them.
+  const tokens = trimmed
+    .replace(/["'\u0000-\u001f]/g, ' ')
+    .replace(/[-:^]/g, ' ')
+    .split(/\s+/)
+    .filter(Boolean);
+  if (tokens.length === 0) return [];
+  const matchExpr = tokens.map((t) => '"' + t.replace(/"/g, '') + '"*').join(' AND ');
+  try {
+    const rows = await db.select<Row>(
+      `SELECT m.* FROM messages m
+       JOIN messages_fts f ON f.message_id = m.id
+       WHERE f.conversation_id = $1 AND messages_fts MATCH $2
+       ORDER BY m.created_at DESC
+       LIMIT $3`,
+      [conversationId, matchExpr, limit],
+    );
+    return rows.map((r) => ({
+      id: r.id,
+      conversationId: r.conversation_id,
+      senderId: r.sender_id,
+      senderDeviceId: r.sender_device_id,
+      replyToId: r.reply_to_id,
+      editedAt: r.edited_at,
+      deletedAt: r.deleted_at,
+      createdAt: r.created_at,
+      plaintext: r.plaintext,
+    }));
+  } catch (err: unknown) {
+    console.warn('searchCachedMessages failed', err);
+    return [];
+  }
+}
+
 // Housekeeping — run once per session to bound the cache size. Keeps the
 // latest KEEP_PER_CONV messages per conversation.
 const KEEP_PER_CONV = 1000;

apps/desktop/src/lib/screenShareSettings.ts

@@ -24,12 +24,18 @@ export interface ScreenShareSettings {
   displaySurface: DisplaySurfaceHint;
   // User-chosen framerate. `null` falls back to preset's default.
   framerateOverride: number | null;
+  // Include system audio ("go live" style). On some hosts getDisplayMedia
+  // can't capture system audio (macOS without special entitlements, some
+  // Linux setups). If the browser ignores the `audio: true` request we
+  // silently fall through to a video-only share.
+  includeSystemAudio: boolean;
 }
 
 const DEFAULTS: ScreenShareSettings = {
   preset: 'auto',
   displaySurface: null,
   framerateOverride: null,
+  includeSystemAudio: false,
 };
 
 export interface PresetParams {
@@ -121,6 +127,10 @@ function read(): ScreenShareSettings {
         typeof parsed.framerateOverride === 'number' && parsed.framerateOverride > 0
           ? parsed.framerateOverride
           : DEFAULTS.framerateOverride,
+      includeSystemAudio:
+        typeof parsed.includeSystemAudio === 'boolean'
+          ? parsed.includeSystemAudio
+          : DEFAULTS.includeSystemAudio,
     };
     return cached;
   } catch {

apps/desktop/src/lib/useActiveSpeakers.ts

@@ -1,6 +1,8 @@
 import type { AudioTrack, Participant, Room } from 'livekit-client';
 import { ParticipantEvent, RoomEvent, Track } from 'livekit-client';
-import { useEffect, useState } from 'react';
+import { useEffect, useRef, useState } from 'react';
+
+import { getAudioSettings, subscribeAudioSettings } from './audioSettings';
 
 // Real-time speaking ring driven by Web Audio API AnalyserNodes directly on
 // each participant's audio MediaStreamTrack. LiveKit's own `audioLevel` +
@@ -9,9 +11,10 @@ import { useEffect, useState } from 'react';
 // lights up within one animation frame of actual speech.
 //
 // Hold time of 250ms prevents flicker between words / short pauses.
+// RMS threshold is user-tunable via audioSettings.voiceThreshold so soft
+// speakers / noisy rooms can dial in their own sensitivity.
 const POLL_MS = 50;
 const HOLD_MS = 250;
-const THRESHOLD = 0.03; // RMS on 0..1 — tuned against soft speech
 const FFT_SIZE = 256;
 
 interface Probe {
@@ -80,6 +83,15 @@ function firstAudioTrack(p: Participant): AudioTrack | null {
 
 export function useActiveSpeakers(room: Room | null): Set<string> {
   const [ids, setIds] = useState<Set<string>>(() => new Set());
+  const thresholdRef = useRef<number>(getAudioSettings().voiceThreshold);
+
+  // Live-subscribe so the slider in settings takes effect without a call
+  // restart. Reading via ref keeps the tick-loop branch-free.
+  useEffect(() => {
+    return subscribeAudioSettings((s) => {
+      thresholdRef.current = s.voiceThreshold;
+    });
+  }, []);
 
   useEffect(() => {
     if (!room) {
@@ -142,8 +154,9 @@ export function useActiveSpeakers(room: Room | null): Set<string> {
       room.remoteParticipants.forEach(syncProbe);
 
       const now = Date.now();
+      const threshold = thresholdRef.current;
       for (const [id, probe] of probes) {
-        if (sampleRms(probe) > THRESHOLD) lastActive.set(id, now);
+        if (sampleRms(probe) > threshold) lastActive.set(id, now);
       }
       const next = new Set<string>();
       for (const [id, t] of lastActive) {

apps/desktop/src/lib/useConversationMessages.ts

@@ -473,6 +473,35 @@ export function useConversationMessages({ conversationId, userId, deviceId }: Ar
       const priv = privateKeyRef.current;
       if (!priv) throw new Error('private key not loaded');
 
+      // Slash-command: /tempmsg <seconds> <text> sends an ephemeral message
+      // that the sender auto-deletes after the window elapses. Both peers
+      // see the countdown via the expireMs field embedded in the plaintext
+      // payload — no server support required.
+      const tempMatch = /^\/tempmsg\s+(\d+)\s+([\s\S]+)$/i.exec(trimmed);
+      if (tempMatch && images.length === 0) {
+        const seconds = Math.min(3600, Math.max(5, parseInt(tempMatch[1]!, 10)));
+        const body = tempMatch[2]!.trim();
+        const payload = JSON.stringify({
+          v: 1,
+          type: 'text',
+          text: body,
+          attachments: [],
+          expireMs: seconds * 1000,
+        });
+        try {
+          await sendText(conversationId, userId, deviceId, priv, payload, replyToId);
+        } catch (err: unknown) {
+          const msg = err instanceof Error ? err.message : 'send failed';
+          enqueueOutbox({
+            conversationId,
+            text: payload,
+            replyToId,
+            error: msg,
+          });
+        }
+        return;
+      }
+
       // Text-only path is retryable — if the network is down or the server
       // rejects transiently, stash in the outbox and keep the UI optimistic.
       // Attachments can't be deferred (large payloads, uploaded separately),

apps/desktop/src/lib/videoBlur.ts

@@ -0,0 +1,67 @@
+// Background-blur processor wrapper. LiveKit's `@livekit/track-processors`
+// ships a MediaPipe-based selfie-segmentation pipeline that keeps the
+// foreground sharp and blurs the background. The model (~1.5MB) downloads
+// lazily on first activation, so users who never enable blur don't pay
+// for it.
+//
+// attach/detach hide behind a guard so repeated toggles don't create a
+// stack of processors — `setProcessor(null)` tears down the WebGL context
+// and frees the GPU surface.
+
+import type { LocalParticipant, LocalVideoTrack } from 'livekit-client';
+import { Track } from 'livekit-client';
+
+let cachedProcessor: unknown = null;
+
+async function getProcessor(): Promise<unknown> {
+  if (cachedProcessor) return cachedProcessor;
+  const mod = (await import('@livekit/track-processors')) as {
+    BackgroundBlur?: (radius?: number) => unknown;
+  };
+  if (!mod.BackgroundBlur) {
+    throw new Error('BackgroundBlur not exported by @livekit/track-processors');
+  }
+  cachedProcessor = mod.BackgroundBlur(12);
+  return cachedProcessor;
+}
+
+function getCameraTrack(lp: LocalParticipant): LocalVideoTrack | null {
+  const pub = lp.getTrackPublication(Track.Source.Camera);
+  const track = pub?.track;
+  if (!track) return null;
+  return track as LocalVideoTrack;
+}
+
+export async function applyBackgroundBlurToLocal(lp: LocalParticipant): Promise<void> {
+  try {
+    const track = getCameraTrack(lp);
+    if (!track) return;
+    const processor = await getProcessor();
+    // `setProcessor` is declared on LocalVideoTrack; cast because the
+    // processor type lives in a separate module we don't want to strongly
+    // couple to here.
+    await (track as unknown as {
+      setProcessor: (p: unknown) => Promise<void>;
+    }).setProcessor(processor);
+  } catch (err: unknown) {
+    console.warn('applyBackgroundBlur failed', err);
+  }
+}
+
+export async function removeBackgroundBlurFromLocal(lp: LocalParticipant): Promise<void> {
+  try {
+    const track = getCameraTrack(lp);
+    if (!track) return;
+    const setter = (track as unknown as {
+      setProcessor?: (p: unknown) => Promise<void>;
+      stopProcessor?: () => Promise<void>;
+    });
+    if (setter.stopProcessor) {
+      await setter.stopProcessor();
+    } else if (setter.setProcessor) {
+      await setter.setProcessor(null);
+    }
+  } catch (err: unknown) {
+    console.warn('removeBackgroundBlur failed', err);
+  }
+}

apps/desktop/src/lib/wakeLock.ts

@@ -0,0 +1,77 @@
+// Screen wake-lock for active calls. WebKit + WebView2 both ship the
+// Screen Wake Lock API (tauri 2.x). Browsers release the sentinel when
+// the page becomes hidden, so we re-acquire on visibilitychange while a
+// call is active.
+
+interface WakeLockSentinelLike {
+  release: () => Promise<void>;
+  addEventListener: (event: string, fn: () => void) => void;
+}
+
+interface WakeLockNavigator {
+  wakeLock?: {
+    request: (type: 'screen') => Promise<WakeLockSentinelLike>;
+  };
+}
+
+let sentinel: WakeLockSentinelLike | null = null;
+let active = false;
+let visibilityBound = false;
+
+function hasWakeLock(): boolean {
+  return typeof navigator !== 'undefined' && !!(navigator as unknown as WakeLockNavigator).wakeLock;
+}
+
+async function acquire(): Promise<void> {
+  if (sentinel || !hasWakeLock()) return;
+  try {
+    const s = await (navigator as unknown as WakeLockNavigator).wakeLock!.request('screen');
+    sentinel = s;
+    s.addEventListener('release', () => {
+      sentinel = null;
+      // If still active (released by the browser because we went hidden),
+      // wait for visibility and re-request.
+    });
+  } catch (err: unknown) {
+    // Permission denied, document not visible, etc. Harmless — the call
+    // still works, the user's screen may dim. Log once.
+    console.warn('wakeLock request failed', err);
+  }
+}
+
+async function release(): Promise<void> {
+  if (!sentinel) return;
+  try {
+    await sentinel.release();
+  } catch {
+    /* already released */
+  }
+  sentinel = null;
+}
+
+function onVisibility(): void {
+  if (!active) return;
+  if (document.visibilityState === 'visible') {
+    void acquire();
+  }
+}
+
+// Called from CallContext when the call enters a state that should keep
+// the screen awake (connected / connecting). Toggle off again when the
+// call ends.
+export async function setCallWakeLock(on: boolean): Promise<void> {
+  active = on;
+  if (on) {
+    if (!visibilityBound) {
+      document.addEventListener('visibilitychange', onVisibility);
+      visibilityBound = true;
+    }
+    await acquire();
+  } else {
+    if (visibilityBound) {
+      document.removeEventListener('visibilitychange', onVisibility);
+      visibilityBound = false;
+    }
+    await release();
+  }
+}

apps/desktop/src/pages/ConversationPage.tsx

@@ -24,12 +24,15 @@ import { InCallPanel } from '../components/InCallPanel';
 import { IncomingCallPanel } from '../components/IncomingCallPanel';
 import { MentionAutocomplete } from '../components/MentionAutocomplete';
 import { MessageBubble, type QuotedRef } from '../components/MessageBubble';
+import { UserProfilePopover } from '../components/UserProfilePopover';
 import { TypingIndicator } from '../components/TypingIndicator';
 import { VoiceRecorder } from '../components/VoiceRecorder';
 import type { DecryptedMessage } from '@chat-app/shared/chat';
 import { useAuth } from '../context/AuthContext';
 import { useCall } from '../context/CallContext';
 import { useConversationsContext } from '../context/ConversationsContext';
+import { compressImages } from '../lib/imageCompress';
+import { searchCachedMessages } from '../lib/messageCache';
 import type { OutboxItem } from '../lib/messageOutbox';
 import { useConversationMessages } from '../lib/useConversationMessages';
 import { useMessageReactions } from '../lib/useMessageReactions';
@@ -45,7 +48,7 @@ export function ConversationPage() {
   const { t } = useTranslation(['app', 'errors']);
   const { id } = useParams<{ id: string }>();
   const { session, device } = useAuth();
-  const { conversations, setActiveConversation, markRead } = useConversationsContext();
+  const { conversations, setActiveConversation, markRead, unread } = useConversationsContext();
 
   const conversation = useMemo(
     () => conversations.find((c) => c.id === id) ?? null,
@@ -145,6 +148,14 @@ export function ConversationPage() {
   const [highlightedId, setHighlightedId] = useState<string | null>(null);
   const [displayCount, setDisplayCount] = useState<number>(150);
   const [isDraggingFile, setIsDraggingFile] = useState(false);
+  // Snapshot of the "first-unread-message" id captured once the very first
+  // render of this conversation lands. Stays fixed until the user switches
+  // away so the divider doesn't jump around while new messages arrive.
+  const firstUnreadRef = useRef<string | null>(null);
+  const firstUnreadComputedRef = useRef<boolean>(false);
+  const [profilePopover, setProfilePopover] = useState<
+    { userId: string; x: number; y: number } | null
+  >(null);
   const [mentionState, setMentionState] = useState<
     { query: string; start: number } | null
   >(null);
@@ -161,8 +172,27 @@ export function ConversationPage() {
     setSearchOpen(false);
     setSearchQuery('');
     setDisplayCount(150);
+    firstUnreadRef.current = null;
+    firstUnreadComputedRef.current = false;
   }, [id]);
 
+  // On first message-list populate for this conversation, pin the divider
+  // above the oldest-unread message. We only compute once — subsequent
+  // inserts push the divider "further back" visually, which matches
+  // Discord's behaviour.
+  useEffect(() => {
+    if (firstUnreadComputedRef.current) return;
+    if (!id || messages.length === 0) return;
+    const count = unread[id] ?? 0;
+    firstUnreadComputedRef.current = true;
+    if (count === 0 || count > messages.length) {
+      firstUnreadRef.current = null;
+      return;
+    }
+    const boundary = messages[messages.length - count];
+    firstUnreadRef.current = boundary ? boundary.id : null;
+  }, [id, messages, unread]);
+
   // Expand window when the "load older" sentinel scrolls into view. Doubles
   // effective window on each trigger so scrolling up quickly converges to
   // rendering everything.
@@ -257,6 +287,32 @@ export function ConversationPage() {
       searchDateTo !== '',
     [searchQuery, searchSenderId, searchAttachmentsOnly, searchDateFrom, searchDateTo],
   );
+
+  // FTS5-backed supplementary results: covers cached messages that aren't in
+  // the currently-loaded window (`messages`). Runs only when there's a text
+  // query — filters alone stay in-memory because they depend on already-
+  // decrypted payload state.
+  const [ftsExtras, setFtsExtras] = useState<DecryptedMessage[]>([]);
+  useEffect(() => {
+    if (!id) {
+      setFtsExtras([]);
+      return;
+    }
+    const q = searchQuery.trim();
+    if (q.length < 2) {
+      setFtsExtras([]);
+      return;
+    }
+    let cancelled = false;
+    void searchCachedMessages(id, q, 200).then((rows) => {
+      if (cancelled) return;
+      setFtsExtras(rows);
+    });
+    return () => {
+      cancelled = true;
+    };
+  }, [id, searchQuery]);
+
   const searchMatches = useMemo(() => {
     if (!searchActive) return [] as DecryptedMessage[];
     const q = searchQuery.trim().toLowerCase();
@@ -265,7 +321,26 @@ export function ConversationPage() {
     const toTs = searchDateTo
       ? new Date(searchDateTo).getTime() + 24 * 3600 * 1000 - 1
       : null;
-    return messages.filter((m) => {
+    // Union the live `messages` array with any FTS5-only rows not yet
+    // loaded into memory, keyed by id so we don't double-count.
+    const seen = new Set<string>();
+    const pool: DecryptedMessage[] = [];
+    for (const m of messages) {
+      if (!seen.has(m.id)) {
+        seen.add(m.id);
+        pool.push(m);
+      }
+    }
+    for (const m of ftsExtras) {
+      if (!seen.has(m.id)) {
+        seen.add(m.id);
+        pool.push(m);
+      }
+    }
+    pool.sort(
+      (a, b) => new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime(),
+    );
+    return pool.filter((m) => {
       if (searchSenderId && m.senderId !== searchSenderId) return false;
       const created = new Date(m.createdAt).getTime();
       if (fromTs !== null && created < fromTs) return false;
@@ -277,7 +352,16 @@ export function ConversationPage() {
       if (q && !parsed.text.toLowerCase().includes(q)) return false;
       return true;
     });
-  }, [messages, searchActive, searchQuery, searchSenderId, searchAttachmentsOnly, searchDateFrom, searchDateTo]);
+  }, [
+    messages,
+    ftsExtras,
+    searchActive,
+    searchQuery,
+    searchSenderId,
+    searchAttachmentsOnly,
+    searchDateFrom,
+    searchDateTo,
+  ]);
 
   // Reset/clamp the active match index when the match set changes.
   useEffect(() => {
@@ -353,9 +437,13 @@ export function ConversationPage() {
     }
   }
 
-  function ingestFiles(files: File[]) {
+  async function ingestFiles(files: File[]) {
+    // Pre-compression so heavy phone photos (typically 4-8MB) don't bust the
+    // 10MB limit and don't waste storage/bandwidth. Non-image + animated
+    // files are passed through unchanged.
+    const compressed = await compressImages(files);
     const next: File[] = [];
-    for (const f of files) {
+    for (const f of compressed) {
       if (f.size > 10 * 1024 * 1024) {
         setSendError('Datei zu groß (max 10 MB)');
         continue;
@@ -367,7 +455,7 @@ export function ConversationPage() {
 
   function handleFilesChosen(list: FileList | null) {
     if (!list) return;
-    ingestFiles(Array.from(list));
+    void ingestFiles(Array.from(list));
   }
 
   const { state: callState } = useCall();
@@ -405,7 +493,7 @@ export function ConversationPage() {
         if (!e.dataTransfer?.files?.length) return;
         e.preventDefault();
         setIsDraggingFile(false);
-        ingestFiles(Array.from(e.dataTransfer.files));
+        void ingestFiles(Array.from(e.dataTransfer.files));
       }}
     >
       {!callHereActive && (
@@ -512,6 +600,18 @@ export function ConversationPage() {
                 (m.senderId !== myId ? (conversation?.peer ?? null) : null);
               return (
                 <li key={m.id}>
+                  {firstUnreadRef.current === m.id && (
+                    <div
+                      aria-label="Neue Nachrichten"
+                      className="my-2 flex items-center gap-3 px-2"
+                    >
+                      <span className="h-px flex-1 bg-rose-500/60" />
+                      <span className="rounded-full bg-rose-500/15 px-2 py-0.5 text-[10px] font-semibold uppercase tracking-wider text-rose-500">
+                        Neue Nachrichten
+                      </span>
+                      <span className="h-px flex-1 bg-rose-500/60" />
+                    </div>
+                  )}
                   <MessageBubble
                     message={m}
                     mine={m.senderId === myId}
@@ -540,6 +640,14 @@ export function ConversationPage() {
                     onJumpToMessage={jumpToMessage}
                     onReply={handleReply}
                     onForward={handleForward}
+                    onAvatarClick={(uid, ev) => {
+                      ev.stopPropagation();
+                      setProfilePopover({
+                        userId: uid,
+                        x: ev.clientX,
+                        y: ev.clientY,
+                      });
+                    }}
                     highlighted={highlightedId === m.id}
                   />
                 </li>
@@ -754,7 +862,7 @@ export function ConversationPage() {
               }
               if (pics.length > 0) {
                 e.preventDefault();
-                ingestFiles(pics);
+                void ingestFiles(pics);
               }
             }}
             rows={1}
@@ -778,6 +886,20 @@ export function ConversationPage() {
         currentConversationId={id ?? null}
         onClose={() => setForwardTarget(null)}
       />
+
+      {profilePopover && (
+        <UserProfilePopover
+          userId={profilePopover.userId}
+          profile={
+            conversation?.members.find((m) => m.userId === profilePopover.userId)?.profile ??
+            conversation?.peer ??
+            null
+          }
+          x={profilePopover.x}
+          y={profilePopover.y}
+          onClose={() => setProfilePopover(null)}
+        />
+      )}
     </div>
   );
 }

apps/desktop/src/pages/SettingsPage.tsx

@@ -9,6 +9,7 @@ import { useTranslation } from 'react-i18next';
 
 import { Avatar } from '../components/Avatar';
 import { BackupExportDialog } from '../components/BackupExportDialog';
+import { BackupRestoreDialog } from '../components/BackupRestoreDialog';
 import { RingtoneSettings } from '../components/RingtoneSettings';
 import { SoundboardSettings } from '../components/SoundboardSettings';
 import { LockIcon } from '../components/icons';
@@ -347,10 +348,99 @@ function AudioQualityControls() {
                 'Mono 48 kbps mit Noise-Suppression, Echo-Cancellation und Auto-Gain. Optimiert für Sprache im Raum.',
             })}
       </p>
+
+      <SettingRow
+        label={t('app:settings.noise_suppression', { defaultValue: 'Noise Suppression' })}
+      >
+        <InlineToggle
+          checked={cfg.noiseSuppression}
+          onChange={(v) => updateAudioSettings({ noiseSuppression: v })}
+        />
+      </SettingRow>
+      <p className="text-xs text-fg-muted">
+        {t('app:settings.noise_suppression_hint', {
+          defaultValue:
+            'Unterdrückt Hintergrundgeräusche (Tastatur, Lüfter, Café-Lärm). Ausschalten nur bei Musik/Instrumenten.',
+        })}
+      </p>
+
+      <SettingRow
+        label={t('app:settings.video_blur', {
+          defaultValue: 'Video-Hintergrund unscharf',
+        })}
+      >
+        <InlineToggle
+          checked={cfg.videoBackgroundBlur}
+          onChange={(v) => updateAudioSettings({ videoBackgroundBlur: v })}
+        />
+      </SettingRow>
+      <p className="text-xs text-fg-muted">
+        {t('app:settings.video_blur_hint', {
+          defaultValue:
+            'Blendet den Hintergrund hinter dir aus. Braucht etwas GPU-Leistung und lädt beim ersten Aktivieren ~1,5 MB Modell nach.',
+        })}
+      </p>
+
+      <SettingRow
+        label={t('app:settings.voice_threshold', {
+          defaultValue: 'Sprach-Erkennungs-Schwelle',
+        })}
+      >
+        <div className="flex w-48 items-center gap-2">
+          <input
+            type="range"
+            min={0.005}
+            max={0.1}
+            step={0.005}
+            value={cfg.voiceThreshold}
+            onChange={(e) =>
+              updateAudioSettings({ voiceThreshold: Number(e.target.value) })
+            }
+            className="flex-1 accent-accent"
+          />
+          <span className="w-10 tabular-nums text-right text-[11px] text-fg-muted">
+            {(cfg.voiceThreshold * 100).toFixed(1)}
+          </span>
+        </div>
+      </SettingRow>
+      <p className="text-xs text-fg-muted">
+        {t('app:settings.voice_threshold_hint', {
+          defaultValue:
+            'Wann der grüne Sprech-Ring aufleuchtet. Niedriger = empfindlicher (leise Stimme erfassen), höher = tolerant gegen Raumlärm.',
+        })}
+      </p>
     </>
   );
 }
 
+function InlineToggle({
+  checked,
+  onChange,
+}: {
+  checked: boolean;
+  onChange: (next: boolean) => void;
+}) {
+  return (
+    <button
+      type="button"
+      role="switch"
+      aria-checked={checked}
+      onClick={() => onChange(!checked)}
+      className={
+        'relative inline-flex h-6 w-11 shrink-0 cursor-pointer rounded-full transition focus:outline-none focus-visible:ring-2 focus-visible:ring-accent/40 ' +
+        (checked ? 'bg-accent' : 'bg-surface')
+      }
+    >
+      <span
+        className={
+          'absolute left-0.5 top-0.5 h-5 w-5 rounded-full bg-white shadow transition ' +
+          (checked ? 'translate-x-5' : '')
+        }
+      />
+    </button>
+  );
+}
+
 interface AvatarControlsProps {
   patchProfile: (patch: Parameters<typeof updateOwnProfile>[1]) => Promise<void>;
   busy: boolean;
@@ -464,6 +554,7 @@ function DeviceKeyBackupControls() {
   const { t } = useTranslation(['app']);
   const { profile, device } = useAuth();
   const [open, setOpen] = useState(false);
+  const [restoreOpen, setRestoreOpen] = useState(false);
   const [privateKey, setPrivateKey] = useState<Uint8Array | null>(null);
   const [err, setErr] = useState<string | null>(null);
   const canRun = !!profile?.userId && !!device?.id;
@@ -502,14 +593,24 @@ function DeviceKeyBackupControls() {
             'Backup deines Geräteschlüssels. Ohne Backup kein Zugriff auf alte Nachrichten wenn Gerät oder Browser-Storage verloren geht. Wiederherstellung passiert im Gerät-Einrichtungsbildschirm.',
         })}
       </p>
+      <div className="mt-3 flex flex-wrap gap-2">
         <button
           type="button"
           disabled={!canRun}
           onClick={() => void handleOpen()}
-        className="mt-3 inline-flex cursor-pointer items-center gap-1.5 rounded-lg bg-accent px-3 py-2 text-sm font-semibold text-accent-fg transition hover:brightness-110 disabled:cursor-not-allowed disabled:opacity-50"
+          className="inline-flex cursor-pointer items-center gap-1.5 rounded-lg bg-accent px-3 py-2 text-sm font-semibold text-accent-fg transition hover:brightness-110 disabled:cursor-not-allowed disabled:opacity-50"
         >
           {t('app:backup.export_open', { defaultValue: 'Backup erstellen' })}
         </button>
+        <button
+          type="button"
+          disabled={!profile?.userId}
+          onClick={() => setRestoreOpen(true)}
+          className="inline-flex cursor-pointer items-center gap-1.5 rounded-lg border border-line bg-surface-2 px-3 py-2 text-sm font-semibold text-fg transition hover:bg-surface-3 disabled:cursor-not-allowed disabled:opacity-50"
+        >
+          {t('app:backup.restore_open', { defaultValue: 'Backup wiederherstellen' })}
+        </button>
+      </div>
       {err && (
         <p className="mt-2 text-xs text-rose-600 dark:text-rose-300">{err}</p>
       )}
@@ -523,6 +624,14 @@ function DeviceKeyBackupControls() {
           onClose={handleClose}
         />
       )}
+
+      {profile && (
+        <BackupRestoreDialog
+          open={restoreOpen}
+          userId={profile.userId}
+          onClose={() => setRestoreOpen(false)}
+        />
+      )}
     </div>
   );
 }

packages/shared/src/chat/attachments.ts

@@ -39,6 +39,10 @@ export interface TextMessagePayload {
   type?: 'text';
   text: string;
   attachments: AttachmentHandle[];
+  /** When set, the message self-destructs `expireMs` milliseconds after the
+   *  server's createdAt. Sender initiates the delete; receivers hide locally
+   *  as soon as the window elapses. Added in /tempmsg support. */
+  expireMs?: number;
 }
 
 export interface CallEventPayload {
@@ -52,7 +56,12 @@ export interface CallEventPayload {
 export type MessagePayload = TextMessagePayload | CallEventPayload;
 
 export type ParsedMessagePayload =
-  | { kind: 'text'; text: string; attachments: AttachmentHandle[] }
+  | {
+      kind: 'text';
+      text: string;
+      attachments: AttachmentHandle[];
+      expireMs?: number;
+    }
   | {
       kind: 'call_event';
       status: CallEventStatus;
@@ -91,6 +100,9 @@ export function parseMessagePayload(raw: string | null): ParsedMessagePayload {
         kind: 'text',
         text: typeof t.text === 'string' ? t.text : '',
         attachments: Array.isArray(t.attachments) ? t.attachments : [],
+        ...(typeof t.expireMs === 'number' && t.expireMs > 0
+          ? { expireMs: t.expireMs }
+          : {}),
       };
     }
   } catch {

pnpm-lock.yaml

@@ -59,6 +59,9 @@ importers:
       '@livekit/components-react':
         specifier: ^2.9.0
         version: 2.9.20(livekit-client@2.18.3(@types/dom-mediacapture-record@1.0.22))(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(tslib@2.8.1)
+      '@livekit/track-processors':
+        specifier: ^0.7.2
+        version: 0.7.2(@types/dom-mediacapture-transform@0.1.11)(livekit-client@2.18.3(@types/dom-mediacapture-record@1.0.22))
       '@supabase/supabase-js':
         specifier: ^2.46.0
         version: 2.103.3
@@ -1354,6 +1357,15 @@ packages:
   '@livekit/protocol@1.45.3':
     resolution: {integrity: sha512-WmMxBTsy4dRBqcrswFwUUlgq3Z0nnhOqKR6tX749Rb/PcB1yBMUtrHxZvcsS6qi3/5+86zHeVG+exmu1sZqfJg==}
 
+  '@livekit/track-processors@0.7.2':
+    resolution: {integrity: sha512-lzARBKTbBwqycdR/SwTu6//N0l20BzfDd7grxCXl07676SwRApNtZAK1GJjL1m3dCM3KBqH1aVxjMpNcbOw5uQ==}
+    peerDependencies:
+      '@types/dom-mediacapture-transform': ^0.1.9
+      livekit-client: ^1.12.0 || ^2.1.0
+
+  '@mediapipe/tasks-vision@0.10.14':
+    resolution: {integrity: sha512-vOifgZhkndgybdvoRITzRkIueWWSiCKuEUXXK6Q4FaJsFvRJuwgg++vqFUMlL0Uox62U5aEXFhHxlhV7Ja5e3Q==}
+
   '@noble/hashes@1.8.0':
     resolution: {integrity: sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==}
     engines: {node: ^14.21.3 || >=16}
@@ -1835,6 +1847,12 @@ packages:
   '@types/dom-mediacapture-record@1.0.22':
     resolution: {integrity: sha512-mUMZLK3NvwRLcAAT9qmcK+9p7tpU2FHdDsntR3YI4+GY88XrgG4XiE7u1Q2LAN2/FZOz/tdMDC3GQCR4T8nFuw==}
 
+  '@types/dom-mediacapture-transform@0.1.11':
+    resolution: {integrity: sha512-Y2p+nGf1bF2XMttBnsVPHUWzRRZzqUoJAKmiP10b5umnO6DDrWI0BrGDJy1pOHoOULVmGSfFNkQrAlC5dcj6nQ==}
+
+  '@types/dom-webcodecs@0.1.18':
+    resolution: {integrity: sha512-vAvE8C9DGWR+tkb19xyjk1TSUlJ7RUzzp4a9Anu7mwBT+fpyePWK1UxmH14tMO5zHmrnrRIMg5NutnnDztLxgg==}
+
   '@types/estree@1.0.8':
     resolution: {integrity: sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w==}
 
@@ -6906,6 +6924,14 @@ snapshots:
     dependencies:
       '@bufbuild/protobuf': 1.10.1
 
+  '@livekit/track-processors@0.7.2(@types/dom-mediacapture-transform@0.1.11)(livekit-client@2.18.3(@types/dom-mediacapture-record@1.0.22))':
+    dependencies:
+      '@mediapipe/tasks-vision': 0.10.14
+      '@types/dom-mediacapture-transform': 0.1.11
+      livekit-client: 2.18.3(@types/dom-mediacapture-record@1.0.22)
+
+  '@mediapipe/tasks-vision@0.10.14': {}
+
   '@noble/hashes@1.8.0': {}
 
   '@nodelib/fs.scandir@2.1.5':
@@ -7485,6 +7511,12 @@ snapshots:
 
   '@types/dom-mediacapture-record@1.0.22': {}
 
+  '@types/dom-mediacapture-transform@0.1.11':
+    dependencies:
+      '@types/dom-webcodecs': 0.1.18
+
+  '@types/dom-webcodecs@0.1.18': {}
+
   '@types/estree@1.0.8': {}
 
   '@types/graceful-fs@4.1.9':