feat: port retail magic lifecycle and retained spell UI

Complete the retail cast-intent, target, component, enchantment, and busy-state paths; mount the DAT-authored spell bar, spellbook, component book, effects panels, and shared panel lifecycle; and add scoped input plus conformance coverage.

Co-Authored-By: Codex <noreply@openai.com>

tests/AcDream.Core.Net.Tests/Messages/CastSpellTests.cs

@@ -42,37 +42,92 @@ public sealed class CastSpellTests
     public void ParseMagicUpdateSpell_RoundTrip()
     {
         byte[] payload = new byte[4];
-        BinaryPrimitives.WriteUInt32LittleEndian(payload, 0x3E1u);
-        Assert.Equal(0x3E1u, GameEvents.ParseMagicUpdateSpell(payload));
+        BinaryPrimitives.WriteUInt32LittleEndian(payload, 0x123403E1u);
+        var parsed = GameEvents.ParseMagicUpdateSpell(payload);
+        Assert.Equal(0x123403E1u, parsed);
     }
 
     [Fact]
     public void ParseMagicUpdateEnchantment_RoundTrip()
     {
-        byte[] payload = new byte[16];
-        BinaryPrimitives.WriteUInt32LittleEndian(payload,             42u);       // spellId
-        BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(4),   7u);        // layerId
-        BinaryPrimitives.WriteSingleLittleEndian(payload.AsSpan(8),   300.0f);    // duration
-        BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(12),  0xBEEFu);   // caster
+        byte[] payload = BuildEnchantment(spellId: 42, layer: 7, duration: 300, caster: 0xBEEF);
 
         var parsed = GameEvents.ParseMagicUpdateEnchantment(payload);
         Assert.NotNull(parsed);
-        Assert.Equal(42u, parsed!.Value.SpellId);
-        Assert.Equal(7u, parsed.Value.LayerId);
-        Assert.Equal(300f, parsed.Value.Duration, 4);
+        Assert.Equal((ushort)42, parsed!.Value.SpellId);
+        Assert.Equal((ushort)7, parsed.Value.Layer);
+        Assert.Equal(300d, parsed.Value.Duration, 4);
         Assert.Equal(0xBEEFu, parsed.Value.CasterGuid);
+        Assert.Equal(0x20u, parsed.Value.StatModType);
+        Assert.Equal(7u, parsed.Value.StatModKey);
+        Assert.Equal(1.25f, parsed.Value.StatModValue);
     }
 
     [Fact]
     public void ParseMagicRemoveEnchantment_RoundTrip()
     {
-        byte[] payload = new byte[8];
-        BinaryPrimitives.WriteUInt32LittleEndian(payload,           7u);       // layerId
-        BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(4), 42u);      // spellId
+        byte[] payload = new byte[4];
+        BinaryPrimitives.WriteUInt16LittleEndian(payload, 42);
+        BinaryPrimitives.WriteUInt16LittleEndian(payload.AsSpan(2), 7);
 
         var parsed = GameEvents.ParseMagicRemoveEnchantment(payload);
         Assert.NotNull(parsed);
-        Assert.Equal(7u, parsed!.Value.LayerId);
-        Assert.Equal(42u, parsed.Value.SpellId);
+        Assert.Equal((ushort)7, parsed!.Value.Layer);
+        Assert.Equal((ushort)42, parsed.Value.SpellId);
+    }
+
+    [Fact]
+    public void ParseMagicUpdateMultipleEnchantments_ReadsEveryRecord()
+    {
+        byte[] first = BuildEnchantment(42, 1, 60, 0xAA);
+        byte[] second = BuildEnchantment(43, 2, 120, 0xBB);
+        byte[] payload = new byte[4 + first.Length + second.Length];
+        BinaryPrimitives.WriteUInt32LittleEndian(payload, 2);
+        first.CopyTo(payload, 4);
+        second.CopyTo(payload, 4 + first.Length);
+
+        var parsed = GameEvents.ParseMagicUpdateMultipleEnchantments(payload);
+
+        Assert.NotNull(parsed);
+        Assert.Equal(2, parsed!.Count);
+        Assert.Equal((ushort)42, parsed[0].SpellId);
+        Assert.Equal((ushort)43, parsed[1].SpellId);
+    }
+
+    [Fact]
+    public void ParseMagicUpdateEnchantment_RejectsTruncatedOptionalSpellSetId()
+    {
+        byte[] payload = BuildEnchantment(42, 1, 60, 0xAA);
+        BinaryPrimitives.WriteUInt16LittleEndian(payload.AsSpan(6), 1);
+
+        Assert.Null(GameEvents.ParseMagicUpdateEnchantment(payload));
+    }
+
+    [Fact]
+    public void ParseMagicLayeredSpellList_RejectsTruncation()
+    {
+        byte[] payload = new byte[8];
+        BinaryPrimitives.WriteUInt32LittleEndian(payload, 2);
+        BinaryPrimitives.WriteUInt16LittleEndian(payload.AsSpan(4), 42);
+        BinaryPrimitives.WriteUInt16LittleEndian(payload.AsSpan(6), 1);
+
+        Assert.Null(GameEvents.ParseMagicLayeredSpellList(payload));
+    }
+
+    private static byte[] BuildEnchantment(
+        ushort spellId, ushort layer, double duration, uint caster)
+    {
+        byte[] payload = new byte[60];
+        int offset = 0;
+        WriteU16(spellId); WriteU16(layer); WriteU16(3); WriteU16(0);
+        WriteU32(8); WriteF64(10); WriteF64(duration); WriteU32(caster);
+        WriteF32(0.1f); WriteF32(-1f); WriteF64(0);
+        WriteU32(0x20); WriteU32(7); WriteF32(1.25f);
+        return payload;
+
+        void WriteU16(ushort value) { BinaryPrimitives.WriteUInt16LittleEndian(payload.AsSpan(offset), value); offset += 2; }
+        void WriteU32(uint value) { BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(offset), value); offset += 4; }
+        void WriteF32(float value) { BinaryPrimitives.WriteSingleLittleEndian(payload.AsSpan(offset), value); offset += 4; }
+        void WriteF64(double value) { BinaryPrimitives.WriteDoubleLittleEndian(payload.AsSpan(offset), value); offset += 8; }
     }
 }

tests/AcDream.Core.Net.Tests/Messages/ClientCommandRequestsTests.cs

@@ -147,6 +147,31 @@ public sealed class ClientCommandRequestsTests
         Assert.Equal(25u, Read(body, 16));
     }
 
+    [Fact]
+    public void AddSpellFavorite_MatchesRetailThreeIntegerPayload()
+    {
+        byte[] body = ClientCommandRequests.BuildAddSpellFavorite(9u, 42u, 3, 7);
+
+        Assert.Equal(24, body.Length);
+        Assert.Equal(ClientCommandRequests.AddSpellFavoriteOpcode, Read(body, 8));
+        Assert.Equal(42u, Read(body, 12));
+        Assert.Equal(3u, Read(body, 16));
+        Assert.Equal(7u, Read(body, 20));
+    }
+
+    [Fact]
+    public void RemoveFavoriteAndFilter_MatchRetailPayloads()
+    {
+        byte[] remove = ClientCommandRequests.BuildRemoveSpellFavorite(2u, 42u, 6);
+        byte[] filter = ClientCommandRequests.BuildSpellbookFilter(3u, 0xA5u);
+
+        Assert.Equal(ClientCommandRequests.RemoveSpellFavoriteOpcode, Read(remove, 8));
+        Assert.Equal(42u, Read(remove, 12));
+        Assert.Equal(6u, Read(remove, 16));
+        Assert.Equal(ClientCommandRequests.SpellbookFilterOpcode, Read(filter, 8));
+        Assert.Equal(0xA5u, Read(filter, 12));
+    }
+
     [Fact]
     public void LegacyFriendsCommand_IsAControlMessageWithoutGameActionEnvelope()
     {

tests/AcDream.Core.Net.Tests/Messages/CreateObjectTests.cs

@@ -628,6 +628,22 @@ public sealed class CreateObjectTests
         Assert.Equal(0x50000001u, parsed.Value.PetOwnerId);
     }
 
+    [Fact]
+    public void WeenieHeader_spellId_isPreservedForCasterEndowment()
+    {
+        byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
+            guid: 0x50000025u,
+            name: "Orb",
+            itemType: (uint)ItemType.Caster,
+            weenieFlags: 0x00400000u,
+            spellId: 0x0A6E);
+
+        var parsed = CreateObject.TryParse(body);
+
+        Assert.NotNull(parsed);
+        Assert.Equal(0x0A6Eu, parsed.Value.SpellId);
+    }
+
     private static byte[] BuildMinimalCreateObjectWithWeenieHeader(
         uint guid,
         string name,
@@ -673,7 +689,8 @@ public sealed class CreateObjectTests
         uint materialType = 0,
         uint cooldownId = 0,
         double cooldownDuration = 0,
-        uint petOwnerId = 0)
+        uint petOwnerId = 0,
+        ushort spellId = 0)
     {
         var bytes = new List<byte>();
         WriteU32(bytes, CreateObject.Opcode);
@@ -760,7 +777,7 @@ public sealed class CreateObjectTests
             bytes.AddRange(tmp.ToArray());
         }
         if ((weenieFlags & 0x00200000u) != 0) WriteU16(bytes, burden ?? 0);  // Burden u16
-        if ((weenieFlags & 0x00400000u) != 0) WriteU16(bytes, 0);  // Spell u16
+        if ((weenieFlags & 0x00400000u) != 0) WriteU16(bytes, spellId);  // Spell u16
         if ((weenieFlags & 0x02000000u) != 0) WriteU32(bytes, 0);  // HouseOwner u32
         // HouseRestrictions (0x04000000): not parameterized (zero entries).
         // Wire: Version(u32) + OpenStatus(u32) + MonarchId(u32) + count(u16) + numBuckets(u16) + entries.

tests/AcDream.Core.Net.Tests/Messages/GameEventDispatcherTests.cs

@@ -237,7 +237,8 @@ public sealed class GameEventDispatcherTests
     public void ParseMagicUpdateSpell_RoundTrip()
     {
         byte[] payload = new byte[4];
-        BinaryPrimitives.WriteUInt32LittleEndian(payload, 0x3E1u);  // Flame Bolt I
-        Assert.Equal(0x3E1u, GameEvents.ParseMagicUpdateSpell(payload));
+        BinaryPrimitives.WriteUInt32LittleEndian(payload, 0x123403E1u);
+        var parsed = GameEvents.ParseMagicUpdateSpell(payload);
+        Assert.Equal(0x123403E1u, parsed);
     }
 }