feat(desktop): pinned-messages pill in conv header

apps/desktop/src/components/ConversationHeader.tsx

@@ -14,6 +14,7 @@ import {
   UsersIcon,
   VideoIcon,
 } from './icons';
+import { PinnedMessagesPill } from './PinnedMessagesPill';
 
 const PRESENCE_DOT: Record<PresenceState, string> = {
   online: 'bg-emerald-500',
@@ -30,6 +31,8 @@ interface Props {
   onMediaClick?: () => void;
   onProfileClick?: (ev: React.MouseEvent) => void;
   onSearchClick?: () => void;
+  pinnedCount?: number;
+  onOpenPinned?: () => void;
 }
 
 export function ConversationHeader({
@@ -39,6 +42,8 @@ export function ConversationHeader({
   onMediaClick,
   onProfileClick,
   onSearchClick,
+  pinnedCount = 0,
+  onOpenPinned,
 }: Props) {
   if (!conversation) {
     return <header className="h-[65px] border-b border-line px-6 py-3" aria-busy="true" />;
@@ -49,10 +54,12 @@ export function ConversationHeader({
       <HeaderBar
         conversation={conversation}
         peerPresence={peerPresence}
+        pinnedCount={pinnedCount}
         {...(onInfoClick ? { onInfoClick } : {})}
         {...(onMediaClick ? { onMediaClick } : {})}
         {...(onProfileClick ? { onProfileClick } : {})}
         {...(onSearchClick ? { onSearchClick } : {})}
+        {...(onOpenPinned ? { onOpenPinned } : {})}
       />
       {/* Voice-channel rail rendered separately in ConversationPage so it
           can sit between the message surface and the in-call dock. */}
@@ -67,6 +74,8 @@ interface HeaderBarProps {
   onMediaClick?: () => void;
   onProfileClick?: (ev: React.MouseEvent) => void;
   onSearchClick?: () => void;
+  pinnedCount?: number;
+  onOpenPinned?: () => void;
 }
 
 function HeaderBar({
@@ -76,6 +85,8 @@ function HeaderBar({
   onMediaClick,
   onProfileClick,
   onSearchClick,
+  pinnedCount = 0,
+  onOpenPinned,
 }: HeaderBarProps) {
   const { t } = useTranslation(['app']);
 
@@ -140,6 +151,7 @@ function HeaderBar({
         <div className="flex min-w-0 items-center gap-2">
           {!isDm && <UsersIcon className="h-4 w-4 shrink-0 text-fg-muted" />}
           <p className="truncate font-display text-base font-semibold text-fg">{title}</p>
+          <PinnedMessagesPill count={pinnedCount} onClick={() => onOpenPinned?.()} />
         </div>
         <p className="truncate text-xs text-fg-muted">
           {isDm ? (

apps/desktop/src/components/PinnedMessagesPill.tsx

@@ -0,0 +1,23 @@
+import { PinIcon } from './icons';
+
+interface Props {
+  count: number;
+  onClick: () => void;
+}
+
+// Compact chip rendered in the conv header that opens the pinned panel.
+// Renders nothing when count is 0 so a fresh conv shows no clutter.
+export function PinnedMessagesPill({ count, onClick }: Props) {
+  if (count === 0) return null;
+  return (
+    <button
+      type="button"
+      onClick={onClick}
+      className="inline-flex h-7 cursor-pointer items-center gap-1.5 rounded-full border border-line bg-surface-3 px-2.5 text-xs font-medium text-fg-muted transition hover:bg-surface-2 hover:text-fg focus:outline-none focus-visible:ring-2 focus-visible:ring-accent/40"
+      title="Angepinnte Nachrichten anzeigen"
+    >
+      <PinIcon className="h-3 w-3 text-accent" />
+      <span>{count} angepinnt</span>
+    </button>
+  );
+}