Initial commit: Theriapolis baseline at port/godot branch point

Captures the pre-Godot-port state of the codebase. This is the rollback
anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md).
All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Theriapolis.Tests/Entities/ActorCharacterTests.cs

@@ -0,0 +1,62 @@
+using Theriapolis.Core.Data;
+using Theriapolis.Core.Entities;
+using Theriapolis.Core.Rules.Character;
+using Theriapolis.Core.Rules.Stats;
+using Theriapolis.Core.Util;
+using Xunit;
+
+namespace Theriapolis.Tests.Entities;
+
+public sealed class ActorCharacterTests
+{
+    private readonly ContentResolver _content = new(new ContentLoader(TestHelpers.DataDirectory));
+
+    [Fact]
+    public void SpawnPlayer_WithCharacter_AttachesIt()
+    {
+        var mgr = new ActorManager();
+        var character = MakeCharacter();
+        var p = mgr.SpawnPlayer(new Vec2(100, 200), character);
+        Assert.NotNull(p.Character);
+        Assert.Equal("Wolf-Folk", p.Character!.Species.Name);
+        Assert.Equal(Allegiance.Player, p.Allegiance);
+    }
+
+    [Fact]
+    public void SpawnPlayer_NoCharacter_LeavesItNull()
+    {
+        var mgr = new ActorManager();
+        var p = mgr.SpawnPlayer(new Vec2(100, 200));
+        Assert.Null(p.Character);
+        Assert.True(p.IsAlive);  // null-character actors are considered alive
+    }
+
+    [Fact]
+    public void Actor_IsAlive_ReflectsCharacterHp()
+    {
+        var mgr = new ActorManager();
+        var character = MakeCharacter();
+        var p = mgr.SpawnPlayer(new Vec2(0, 0), character);
+        Assert.True(p.IsAlive);
+        character.CurrentHp = 0;
+        Assert.False(p.IsAlive);
+        character.Conditions.Add(Condition.Unconscious);
+        Assert.True(p.IsAlive);  // unconscious counts as alive (death-save loop)
+    }
+
+    private Character MakeCharacter()
+    {
+        return new CharacterBuilder
+        {
+            Clade        = _content.Clades["canidae"],
+            Species      = _content.Species["wolf"],
+            ClassDef     = _content.Classes["fangsworn"],
+            Background   = _content.Backgrounds["pack_raised"],
+            BaseAbilities = new AbilityScores(15, 14, 13, 12, 10, 8),
+            Name         = "Test",
+        }
+        .ChooseSkill(SkillId.Athletics)
+        .ChooseSkill(SkillId.Intimidation)
+        .Build();
+    }
+}