Refactor project structure and update documentation. Replace PixiJS with plain DOM for UI rendering, enhance README with game features, and revise protocol documentation for HTTP API. Remove unused files and streamline client code for better maintainability.

src/HSchool.Server/Game/GameCommand.cs

@@ -1,20 +1,30 @@
-using HSchool.Protocol;
-
-namespace HSchool.Server.Game;
-
-/// <summary>
-/// Work item handed from a connection thread to the loop thread. The simulation is
-/// single-threaded, so every mutation arrives as one of these.
-/// </summary>
-internal abstract record GameCommand
-{
-    /// <summary>
-    /// Spawns an avatar for the connection. The loop completes <see cref="EntityId"/>
-    /// with the replication id so the handler can send a Welcome frame.
-    /// </summary>
-    internal sealed record Join(uint PlayerId, TaskCompletionSource<uint> EntityId) : GameCommand;
-
-    internal sealed record Leave(uint PlayerId) : GameCommand;
-
-    internal sealed record Input(uint PlayerId, InputButtons Buttons, uint Sequence) : GameCommand;
-}
+namespace HSchool.Server.Game;
+
+/// <summary>
+/// Work item handed from a request or connection thread to the loop thread. Schools are
+/// single-threaded, so every mutation and every read of live state arrives as one of these.
+/// </summary>
+internal abstract record GameCommand
+{
+    internal sealed record CreateSchool(
+        string Name,
+        DateTime StartDate,
+        TaskCompletionSource<SchoolCreationOutcome> Result) : GameCommand;
+
+    internal sealed record DeleteSchool(int SchoolId, TaskCompletionSource<bool> Result) : GameCommand;
+
+    internal sealed record SuggestName(TaskCompletionSource<string> Result) : GameCommand;
+
+    /// <summary>A connection starts watching a school; its calendar starts running.</summary>
+    internal sealed record OpenSchool(uint PlayerId, int SchoolId) : GameCommand;
+
+    /// <summary>
+    /// Stops watching. The school id travels with the command because the connection may already
+    /// be gone from the registry by the time the loop thread gets here.
+    /// </summary>
+    internal sealed record CloseSchool(uint PlayerId, int SchoolId) : GameCommand;
+
+    internal sealed record SetRunning(uint PlayerId, bool Running) : GameCommand;
+
+    internal sealed record SetSpeed(uint PlayerId, byte SpeedIndex) : GameCommand;
+}