Slice 1: combat readability + HUD declutter (DR-038)

Four playtest do-now wins:
- Enemy health bars: pooled world-space Canvas, on-damage-sticky + fade,
  always-on <25% HP (CombatFeedbackSystem; no new replication).
- Telegraph fix: new baked client-safe EnemyTelegraph sizes the danger-cone ramp
  per enemy (0->1 ending at impact, fixes the Charger plateau); windup 18->22;
  a windup scale-pulse.
- Build-mode toggle: BuildPaletteState.PaletteOpen hides the palette by default,
  Tab / gamepad-Y toggles, with a discovery chip (HudSystem/BuildSendSystem).
- Charger committed-lunge tell: [GhostEnabledBit] IsLunging derived once/tick from
  LungeState (the Dead idiom); the danger cone persists through the lunge.

345/345 EditMode (+3 IsLunging derive tests); Play-validated: ghost-hash change
did not break the handshake, bake correct (telegraph on all enemies, IsLunging
baked-disabled on the Charger, replicated to client), no runtime errors.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Assets/_Project/Scripts/Simulation/Combat/AttackWindup.cs

@@ -16,4 +16,20 @@ namespace ProjectM.Simulation
         /// <summary>Server tick the wind-up completes + the strike lands (0 = not winding up; scheduled via TickUtil.NonZero).</summary>
         [GhostField] public uint WindUpUntilTick;
     }
+
+    /// <summary>Client-safe BAKED telegraph metadata (NOT a [GhostField] — baked values are identical on
+    /// both worlds, so the client reads it directly to size the danger-cone ramp + pick the Charger look).
+    /// WindupTicks = the variant's wind-up lead in ticks (the client danger-ramp denominator: Grunt =
+    /// Tuning.AttackWindupTicks, Charger = ChargerWindupTicks); IsCharger distinguishes the variant since
+    /// LungeState is server-only. Both stored as byte (no enum on a client-read path — honours the Burst
+    /// byte-not-enum convention); never changes at runtime, so a missed snapshot is irrelevant. Baked by
+    /// EnemyAuthoring.EnemyBaker (the SOLE writer — reads sibling ChargerAuthoring to set the Charger values).</summary>
+    public struct EnemyTelegraph : IComponentData
+    {
+        /// <summary>Per-variant wind-up DURATION in ticks (the client danger-ramp denominator).</summary>
+        public byte WindupTicks;
+
+        /// <summary>0 = Grunt-style; 1 = Charger (committed-lunge tell).</summary>
+        public byte IsCharger;
+    }
 }