feat(desktop): GIF button + picker wired into composer

apps/desktop/src/pages/ConversationPage.tsx

@@ -8,6 +8,7 @@ import { ConversationHeader } from '../components/ConversationHeader';
 import { EmojiPicker } from '../components/EmojiPicker';
 import { EmptyState } from '../components/EmptyState';
 import { ForwardDialog } from '../components/ForwardDialog';
+import { GifPicker } from '../components/GifPicker';
 import { GroupInfoPanel } from '../components/GroupInfoPanel';
 import {
   AlertIcon,
@@ -43,6 +44,7 @@ import { compressImages } from '../lib/imageCompress';
 import { ensureInstallId } from '../lib/installId';
 import { searchCachedMessages } from '../lib/messageCache';
 import { supabase } from '../lib/supabase';
+import { type GifResult } from '../lib/tenor';
 import type { OutboxItem } from '../lib/messageOutbox';
 import { useConversationMessages } from '../lib/useConversationMessages';
 import { useMessageReactions } from '../lib/useMessageReactions';
@@ -180,6 +182,7 @@ export function ConversationPage() {
   } | null>(null);
   const [mentionState, setMentionState] = useState<{ query: string; start: number } | null>(null);
   const [emojiOpen, setEmojiOpen] = useState(false);
+  const [gifPickerOpen, setGifPickerOpen] = useState(false);
   const pins = usePinnedMessages(id);
   const [pinnedPanelOpen, setPinnedPanelOpen] = useState(false);
   const pinnedIds = useMemo(() => new Set(pins.map((p) => p.messageId)), [pins]);
@@ -199,6 +202,23 @@ export function ConversationPage() {
     },
     [id, myId, pinnedIds],
   );
+
+  const handleGifPick = useCallback(
+    async (gif: GifResult) => {
+      try {
+        // Download the GIF bytes once and feed them into the existing
+        // image-attachment pipeline so the result is end-to-end-encrypted
+        // like any normal image.
+        const res = await fetch(gif.url);
+        const blob = await res.blob();
+        const file = new File([blob], `tenor-${gif.id}.gif`, { type: 'image/gif' });
+        await send('', [file], null);
+      } catch (err) {
+        console.warn('GIF send failed', err);
+      }
+    },
+    [send],
+  );
   const scrollRef = useRef<HTMLDivElement>(null);
   const loadMoreSentinelRef = useRef<HTMLDivElement>(null);
   const fileInputRef = useRef<HTMLInputElement>(null);
@@ -976,6 +996,22 @@ export function ConversationPage() {
               onClose={() => setEmojiOpen(false)}
             />
           </div>
+          <div className="relative">
+            <button
+              type="button"
+              onClick={() => setGifPickerOpen((v) => !v)}
+              className="flex h-9 w-9 cursor-pointer items-center justify-center rounded-md text-fg-muted hover:bg-surface-3 hover:text-fg"
+              aria-label="GIF"
+              title="GIF einfügen"
+            >
+              <span className="text-xs font-bold">GIF</span>
+            </button>
+            <GifPicker
+              open={gifPickerOpen}
+              onClose={() => setGifPickerOpen(false)}
+              onPick={(gif) => void handleGifPick(gif)}
+            />
+          </div>
           <VoiceRecorder
             disabled={sending}
             onComplete={async (file) => {