feat(chat): #20 CombatChatTranslator - retail-faithful combat -> ChatLog templates

Subscribes to CombatState's DamageDealtAccepted / DamageTaken /
MissedOutgoing / EvadedIncoming / AttackDone / KillLanded events
and emits chat-line text into ChatLog.OnCombatLine, mirroring
holtburger's templates verbatim from references/holtburger/apps/
holtburger-cli/src/pages/game/panels/chat.rs:221-308.

Pieces:
- ChatLog: new ChatKind.Combat value; new CombatLineKind enum
  (Info / Warning / Error) on ChatEntry; OnCombatLine(text, kind)
  adapter.
- CombatChatTranslator (Core, IDisposable). Static formatters:
  FormatDamageType (slashing/piercing/bludgeoning/fire/cold/acid/
  electric/nether), FormatDamageLocation (head/chest/abdomen/
  upper arm/lower arm/hand/upper leg/lower leg/foot), FormatPercent,
  FormatAttackConditionsSuffix.
- ChatVM.RecentLinesDetailed() returns FormattedLine records with
  kind metadata so panels can render combat lines colored.
- ChatPanel switches on Kind/CombatKind: combat-Info -> yellow,
  combat-Warning -> red incoming-damage, combat-Error -> deep red,
  all others -> existing renderer.Text path.
- GameWindow constructs translator after GameEventWiring.WireAll;
  disposes in OnClosing + live-session failure path.

Templates landed:
  Attacker:  "You hit {def} for {dmg} {dtype} damage ({hp%}). [Crit]{suffix}"
  Defender:  "{atk} hit you for {dmg} {dtype} damage to your {loc} ({hp%})..."
  Evade-out: "{def} evaded your attack."
  Evade-in:  "You evaded {atk}'s attack."
  AttackErr: "Attack sequence finished with {error}."
  Kill:      synthesized "You killed {name}." + server PlayerKilled
             death-message arrives separately via ChatLog.OnPlayerKilled.

Deviations from holtburger templates (documented in source):
- DamageDealt omits Critical-hit suffix until CombatState.DamageDealt
  carries the flag (defender-side has it; attacker-side doesn't yet).
- DamageTaken omits (health%) until CombatState.DamageIncoming
  parses the wire health-percent field.
- AttackConditions suffix is implemented but always empty until the
  bitflag is plumbed into CombatState records.

18 new tests (12 translator + 4 ChatVMCombat + 2 ChatLog).
Solution total: 978 green (243 Core.Net + 639 Core + 96 UI).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/AcDream.App/Rendering/GameWindow.cs

@@ -310,6 +310,11 @@ public sealed class GameWindow : IDisposable
     // back to NullCommandBus.Instance.
     private AcDream.UI.Abstractions.LiveCommandBus? _commandBus;
 
+    // Phase I.7 — bridges CombatState's typed events into ChatLog as
+    // retail-faithful "You hit ..." / "... evaded your attack." lines.
+    // Disposable; lives for the duration of the live session.
+    private AcDream.Core.Chat.CombatChatTranslator? _combatChatTranslator;
+
     // Phase G.1-G.2 world lighting/time state.
     public readonly AcDream.Core.World.WorldTimeService WorldTime =
         new AcDream.Core.World.WorldTimeService(
@@ -1224,6 +1229,13 @@ public sealed class GameWindow : IDisposable
                 _liveSession.GameEvents, Items, Combat, SpellBook, Chat, LocalPlayer,
                 TurbineChat);
 
+            // Phase I.7: subscribe to CombatState events and emit
+            // retail-faithful "You hit X for Y damage" chat lines into
+            // the unified ChatLog. The translator owns the wording
+            // (templates ported from holtburger chat.rs:221-308); the
+            // panel renders combat entries via TextColored.
+            _combatChatTranslator = new AcDream.Core.Chat.CombatChatTranslator(Combat, Chat);
+
             // Phase H.1: feed inbound HearSpeech into the chat log.
             _liveSession.SpeechHeard += speech =>
                 Chat.OnLocalSpeech(
@@ -1347,6 +1359,8 @@ public sealed class GameWindow : IDisposable
         catch (Exception ex)
         {
             Console.WriteLine($"live: session failed: {ex.Message}");
+            _combatChatTranslator?.Dispose();
+            _combatChatTranslator = null;
             _liveSession?.Dispose();
             _liveSession = null;
         }
@@ -4931,6 +4945,9 @@ public sealed class GameWindow : IDisposable
         // state. The worker may still be processing a load job that references
         // _dats; Dispose cancels the token and waits up to 2s for the thread.
         _streamer?.Dispose();
+        // Phase I.7: unsubscribe combat → chat translator before the
+        // session it depends on goes away.
+        _combatChatTranslator?.Dispose();
         _liveSession?.Dispose();
         _audioEngine?.Dispose();  // Phase E.2: stop all voices, close AL context
         _staticMesh?.Dispose();