M5: Windows client moderation UI; add C ABI getters for account list, user mute/deafen, channel topic

clients/windows/VoiceCat.Interop/Models.cs

@@ -7,14 +7,44 @@ public sealed record ChannelInfo(
     uint Id,
     uint ParentId,
     string Name,
+    string Topic,
     bool PasswordProtected,
     uint MaxUsers);
 
+public sealed record ChannelEditInfo(
+    uint Id,
+    uint ParentId,
+    string Name,
+    string Topic,
+    bool PasswordProtected,
+    string? Password,
+    uint MaxUsers,
+    uint SortOrder,
+    AudioConfigInfo Audio);
+
 public sealed record UserInfo(
     uint Id,
     string Nickname,
     bool IsGuest,
-    uint ChannelId);
+    uint ChannelId,
+    bool SelfMicMuted,
+    bool SelfDeafened,
+    bool ServerMuted,
+    bool ServerDeafened);
+
+public sealed record PermissionsInfo(
+    bool CanCreateTempChannel,
+    bool CanKick,
+    bool CanBan,
+    bool CanMoveUsers,
+    bool CanAdminAccounts,
+    bool IsAdmin);
+
+public sealed record AccountInfo(
+    string Username,
+    bool IsAdmin,
+    ulong CreatedAtUnixMs,
+    ulong LastLoginUnixMs);
 
 public sealed record StreamSummary(
     uint StreamId,