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/components/layout/MobileShell.tsx

@@ -63,7 +63,8 @@ export function MobileShell() {
     const path = location.pathname;
     const match = path.match(/^\/channels\/([^/]+)\/([^/]+)$/);
     if (match && mobileStack.length === 0) {
-      const [, spaceId, channelId] = match;
+      const spaceId = match[1] ?? '';
+      const channelId = match[2] ?? '';
       if (spaceId === '@me') {
         pushMobileScreen('channel-chat', { channelId, spaceId: '@me' });
       } else {