Hygiene B2: dead-code removal

Delete (unreferenced in any scene, per operator decision):
- TrainingDummy* chain (authoring/spawner/system/components/prefab) + UpgradePickup* chain (authoring/spawner/systems/components/prefab); remove TrainingDummyTag from the 3 live combat queries (AbilityFire/Melee/HealthApplyDamage now key on EnemyTag) and repoint HealthApplyDamageSystemTests to EnemyTag.
- Dead RPC RegionTransitSystem + RegionTransitRequest (no sender, ungated) + its test.
- Heartbeat + HeartbeatSystem (no WorldSystemFilter, ran no-op every tick) + its test.
- BuildSendSystem dead conveyor/pylon dev hooks (s_ConveyorDir, [/] rotation, Place{Pylon,Harvester,Conveyor} statics).
- Deprecated CyclePhase alias consts (Expedition/Defend/Build/*Ticks); repoint WaveSystemTests to Siege/Calm.
- Unread FeelConfig fields (HitFlashDurationMs, RumbleHeavy) + dangling HudUi doc-comments + stale crefs.

451/451 EditMode tests pass. CLAUDE.md HeartbeatSystemTests example ref to be repointed in B7.

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

Assets/_Project/Scripts/Client/Building/BuildSendSystem.cs

@@ -16,14 +16,13 @@ namespace ProjectM.Client
     /// <see cref="BuildPaletteState.Active"/>), so the place-click never also fires. Build mode is suspended while
     /// the pause overlay is open, and the frame a palette button changes the selection never also places.
     /// (2) keyboard hotkeys (fallback, suppressed in palette mode): B/V/F place at the local player's cell.
-    /// Editor-only statics (PlaceStructure / PlaceHarvester / ...) drive the same RPC path from execute_code for
+    /// Editor-only statics (PlaceStructure / PlaceTurret / ...) drive the same RPC path from execute_code for
     /// headless validation. Managed SystemBase; UnityEngine.InputSystem types are fully qualified to avoid the
     /// ProjectM.Simulation.PlayerInput name collision. The server re-validates legality + cost authoritatively.
     /// </summary>
     [WorldSystemFilter(WorldSystemFilterFlags.ClientSimulation)]
     public partial class BuildSendSystem : SystemBase
     {
-        static byte s_ConveyorDir; // key-flow pending conveyor facing (0=+X,1=-X,2=+Z,3=-Z)
 
         // Dev hotkey fallback: key -> buildable (Conveyor uses s_ConveyorDir for facing).
         static readonly (UnityEngine.InputSystem.Key Key, byte Type)[] s_BuildHotkeys =
@@ -62,18 +61,9 @@ namespace ProjectM.Client
         /// <summary>EDITOR / execute_code hook: queue a wall placement at a specific cell.</summary>
         public static void PlaceWall(int cellX, int cellZ) => PlaceStructure(StructureType.Wall, cellX, cellZ);
 
-        /// <summary>EDITOR / execute_code hook: queue a pylon placement at a specific cell.</summary>
-        public static void PlacePylon(int cellX, int cellZ) => PlaceStructure(StructureType.Pylon, cellX, cellZ);
-
-        /// <summary>EDITOR / execute_code hook: queue a harvester placement at a specific cell.</summary>
-        public static void PlaceHarvester(int cellX, int cellZ) => PlaceStructure(StructureType.Harvester, cellX, cellZ);
-
         /// <summary>EDITOR / execute_code hook: queue a fabricator placement at a specific cell.</summary>
         public static void PlaceFabricator(int cellX, int cellZ) => PlaceStructure(StructureType.Fabricator, cellX, cellZ);
 
-        /// <summary>EDITOR / execute_code hook: queue a conveyor placement facing direction (0=+X,1=-X,2=+Z,3=-Z).</summary>
-        public static void PlaceConveyor(int cellX, int cellZ, byte direction) => PlaceStructure(StructureType.Conveyor, cellX, cellZ, direction);
-
 #endif
 
         protected override void OnCreate()
@@ -106,14 +96,9 @@ namespace ProjectM.Client
             // Hotkey fallback (suppressed while the palette build mode is active).
             if (keyboard != null && !BuildPaletteState.Active)
             {
-                if (keyboard.leftBracketKey.wasPressedThisFrame)
-                    s_ConveyorDir = (byte)((s_ConveyorDir + 3) % 4);
-                if (keyboard.rightBracketKey.wasPressedThisFrame)
-                    s_ConveyorDir = (byte)((s_ConveyorDir + 1) % 4);
-
                 foreach (var (key, type) in s_BuildHotkeys)
                     if (keyboard[key].wasPressedThisFrame && TryGetLocalPlayerCell(out int2 cell))
-                        SendBuild(connection, type, cell.x, cell.y, type == StructureType.Conveyor ? s_ConveyorDir : (byte)0);
+                        SendBuild(connection, type, cell.x, cell.y, (byte)0);
             }
 
 #if UNITY_EDITOR

Assets/_Project/Scripts/Client/Presentation/FeelConfig.cs

@@ -45,8 +45,6 @@ namespace ProjectM.Client
         public static float HitStopRefDamage;
         /// <summary>Tint for the (deferred) enemy material hit-flash — exposed now, wired in the ShaderGraph slice.</summary>
         public static Color HitFlashColor;
-        /// <summary>Duration (ms) of the deferred enemy hit-flash.</summary>
-        public static float HitFlashDurationMs;
         /// <summary>Master gate for the (deferred) true freeze-frame hit-stop. FALSE for v1 (camera-punch only).</summary>
         public static bool HitStopFreezeEnabled;
 
@@ -130,8 +128,6 @@ namespace ProjectM.Client
         public static float RumbleHit;
         /// <summary>Rumble strength on a kill.</summary>
         public static float RumbleKill;
-        /// <summary>Rumble strength on dash / local death (the heaviest).</summary>
-        public static float RumbleHeavy;
         /// <summary>Seconds a rumble pulse lasts before it auto-stops.</summary>
         public static float RumbleDurationSec;
 
@@ -190,7 +186,6 @@ namespace ProjectM.Client
             HitStopMaxFrames = 2;         // C4: a 2-frame (~33ms) camera hold reads as crunch, not a lag-y stutter
             HitStopRefDamage = 30f;
             HitFlashColor = new Color(1f, 0.85f, 0.55f, 1f);
-            HitFlashDurationMs = 80f;
             HitStopFreezeEnabled = true;  // C4: enable the finisher hit-stop hold (presentation-only camera freeze, bounded below)
 
             // Feature 1/2 death
@@ -239,7 +234,6 @@ namespace ProjectM.Client
             RumbleEnabled = true;
             RumbleHit = 0.25f;
             RumbleKill = 0.45f;
-            RumbleHeavy = 0.6f;
             RumbleDurationSec = 0.12f;
 
             // Deferred-items pass (2026-06)

Assets/_Project/Scripts/Client/UI/HudUi.cs

@@ -146,8 +146,6 @@ namespace ProjectM.Client
             return e;
         }
 
-        /// <summary>True when the theme is loaded and a sprite is present (callers choose icon vs text fallback).</summary>
-
 
         /// <summary>
         /// An input-prompt chip: the Synty key/button glyph (left untinted to keep its printed face) when present,
@@ -170,7 +168,5 @@ namespace ProjectM.Client
             return cap;
         }
 
-        /// <summary>Apply a uniform 9-slice (horizontal / vertical source-texture px) to a skinned element.</summary>
-
     }
 }