Lobby refactor + species loadouts support (#27576)

* Vox stuff

* Species loadouts and lobby refactor

The control flow for lobby is all over the shop so I pulled it all up from the individual controls so now they handle the bare minimum required and LobbyUIController handles the rest.

* a

* Bulk changes

* a

* weh

* Character import / export

* finalise

* woops this stuff too

* Also datafield exporting

* comments

* Review

Content.Client/Lobby/ClientPreferencesManager.cs

@@ -0,0 +1,117 @@
+using System.Linq;
+using Content.Shared.Preferences;
+using Robust.Client;
+using Robust.Client.Player;
+using Robust.Shared.Network;
+using Robust.Shared.Utility;
+
+namespace Content.Client.Lobby
+{
+    /// <summary>
+    ///     Receives <see cref="PlayerPreferences" /> and <see cref="GameSettings" /> from the server during the initial
+    ///     connection.
+    ///     Stores preferences on the server through <see cref="SelectCharacter" /> and <see cref="UpdateCharacter" />.
+    /// </summary>
+    public sealed class ClientPreferencesManager : IClientPreferencesManager
+    {
+        [Dependency] private readonly IClientNetManager _netManager = default!;
+        [Dependency] private readonly IBaseClient _baseClient = default!;
+        [Dependency] private readonly IPlayerManager _playerManager = default!;
+
+        public event Action? OnServerDataLoaded;
+
+        public GameSettings Settings { get; private set; } = default!;
+        public PlayerPreferences Preferences { get; private set; } = default!;
+
+        public void Initialize()
+        {
+            _netManager.RegisterNetMessage<MsgPreferencesAndSettings>(HandlePreferencesAndSettings);
+            _netManager.RegisterNetMessage<MsgUpdateCharacter>();
+            _netManager.RegisterNetMessage<MsgSelectCharacter>();
+            _netManager.RegisterNetMessage<MsgDeleteCharacter>();
+
+            _baseClient.RunLevelChanged += BaseClientOnRunLevelChanged;
+        }
+
+        private void BaseClientOnRunLevelChanged(object? sender, RunLevelChangedEventArgs e)
+        {
+            if (e.NewLevel == ClientRunLevel.Initialize)
+            {
+                Settings = default!;
+                Preferences = default!;
+            }
+        }
+
+        public void SelectCharacter(ICharacterProfile profile)
+        {
+            SelectCharacter(Preferences.IndexOfCharacter(profile));
+        }
+
+        public void SelectCharacter(int slot)
+        {
+            Preferences = new PlayerPreferences(Preferences.Characters, slot, Preferences.AdminOOCColor);
+            var msg = new MsgSelectCharacter
+            {
+                SelectedCharacterIndex = slot
+            };
+            _netManager.ClientSendMessage(msg);
+        }
+
+        public void UpdateCharacter(ICharacterProfile profile, int slot)
+        {
+            var collection = IoCManager.Instance!;
+            profile.EnsureValid(_playerManager.LocalSession!, collection);
+            var characters = new Dictionary<int, ICharacterProfile>(Preferences.Characters) {[slot] = profile};
+            Preferences = new PlayerPreferences(characters, Preferences.SelectedCharacterIndex, Preferences.AdminOOCColor);
+            var msg = new MsgUpdateCharacter
+            {
+                Profile = profile,
+                Slot = slot
+            };
+            _netManager.ClientSendMessage(msg);
+        }
+
+        public void CreateCharacter(ICharacterProfile profile)
+        {
+            var characters = new Dictionary<int, ICharacterProfile>(Preferences.Characters);
+            var lowest = Enumerable.Range(0, Settings.MaxCharacterSlots)
+                .Except(characters.Keys)
+                .FirstOrNull();
+
+            if (lowest == null)
+            {
+                throw new InvalidOperationException("Out of character slots!");
+            }
+
+            var l = lowest.Value;
+            characters.Add(l, profile);
+            Preferences = new PlayerPreferences(characters, Preferences.SelectedCharacterIndex, Preferences.AdminOOCColor);
+
+            UpdateCharacter(profile, l);
+        }
+
+        public void DeleteCharacter(ICharacterProfile profile)
+        {
+            DeleteCharacter(Preferences.IndexOfCharacter(profile));
+        }
+
+        public void DeleteCharacter(int slot)
+        {
+            var characters = Preferences.Characters.Where(p => p.Key != slot);
+            Preferences = new PlayerPreferences(characters, Preferences.SelectedCharacterIndex, Preferences.AdminOOCColor);
+            var msg = new MsgDeleteCharacter
+            {
+                Slot = slot
+            };
+            _netManager.ClientSendMessage(msg);
+        }
+
+        private void HandlePreferencesAndSettings(MsgPreferencesAndSettings message)
+        {
+            Preferences = message.Preferences;
+            Settings = message.Settings;
+
+            OnServerDataLoaded?.Invoke();
+        }
+    }
+}