Client state spec

State {
  messages: [
    {
      id: 1,
      senderId: 1,
      channelId: 1,
      text: 'Hello world!',
      timestamp: 'unix timestamp?'
    },
  ],
  channels:[
    {
      id: 123,
      name: 'Channel name',
      joined: false,
      lastSeen: Date,
      isFavorite: false,
    },
  ],
  users: [
    {
      id: 1,
      email: 'vasya@pupkin.com',
      name: 'Vasya',
      avatar: 'image.jpg',
      isOnline: false
    },
  ],
  local: {
    userId: 123,
    currentChannelId: 0,
    language: 'en'
  },
}