fix(mobile): resolve all TypeScript errors from integration

- Fix voiceStore method names (toggleMic, leaveVoice, setCurrentVoiceChannel)
- Fix MemberWithUser nested user property access
- Pass required channelId props to MessageList, TypingIndicator, MessageInput
- Fix ConfirmDialog props (isOpen, description, variant, onClose)
- Add mobileStyle prop to Modal component (fullscreen + sheet modes)
- Fix fromId/isAdmin camelCase property names
- Guard possibly undefined touch events and array accesses
- Fix notification channelId resolution

packages/web/src/hooks/useSwipeGesture.ts

@@ -19,6 +19,7 @@ export function useSwipeGesture({
   const handleTouchStart = useCallback((e: TouchEvent) => {
     if (!enabled) return;
     const touch = e.touches[0];
+    if (!touch) return;
     if (touch.clientX <= edgeThreshold) {
       touchStartRef.current = { x: touch.clientX, y: touch.clientY };
       swipingRef.current = false;
@@ -28,6 +29,7 @@ export function useSwipeGesture({
   const handleTouchMove = useCallback((e: TouchEvent) => {
     if (!touchStartRef.current) return;
     const touch = e.touches[0];
+    if (!touch) return;
     const dx = touch.clientX - touchStartRef.current.x;
     const dy = touch.clientY - touchStartRef.current.y;