947ef4d56d
Replace custom gqlFetch() with proper Apollo useQuery/useMutation hooks powered by codegen-generated TypedDocumentNode types. Key changes: - Add GraphQL SDL schema file and codegen config for typescript-vue-apollo - Replace all 28 raw .graphql imports with generated typed documents - Add 12 useQuery() hooks with cache-and-network fetch policy - Add 17 useMutation() hooks with surgical refetchQueries per mutation - Optimistic cache update for setContactInboxHidden (instant archive UX) - Fix contact list subtitle: show lastText instead of channel name - Migrate login page from gqlFetch to useMutation - WebSocket realtime now calls Apollo refetch instead of full data reload Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>