Combat feel pass: enemy hit-flash, melee connect cue, kill pop, gamepad rumble, footsteps, damage-number tiering

Implements the "what's missing" feel backlog from the combat overhaul investigation (wf_c6c87dc5-9c3). All
client-only, observe-only (PresentationSystemGroup), no sim/netcode change, rollback-safe; new FeelConfig knobs
default-stamped on play-enter.

- ENEMY HIT-FLASH (#1 missing): on the enemy Health-decrease edge, a bright body-scaled particle puff in the
  previously-unused FeelConfig.HitFlashColor (via a new EmitColored helper using per-emit startColor) -- the staple
  "I connected" read. (A true material body-flash needs an AnimatedLitShader emission property + Entities Graphics
  MaterialProperty; the puff is the asset-free version.)
- MELEE CONNECT-vs-WHIFF: on the local swing, a client-side MeleeConeMath.InCone overlap over the cached enemy
  snapshot -> immediate connect read (brightens the slash arc, hit-spark at the nearest enemy, a meaty low "thunk"
  SFX, extra FOV punch) before the authoritative server spark arrives. Whiffs stay dim.
- KILL POP: a colored flash burst + rumble on enemy death (on top of the existing burst/shake/FOV).
- GAMEPAD RUMBLE: new RumbleUtil (auto-stopping pulse, gamepad-only, stops on focus-loss, reset on play-enter)
  pulsed on local hit-taken / hit-dealt / kill, gated on AimPresentation.Scheme==Gamepad.
- FOOTSTEPS: edge-detect local locomotion from the position delta -> soft step SFX at a cadence while moving.
- DAMAGE-NUMBER TIERING: SpawnNumber scales font + life by hit magnitude (vs HitStopRefDamage) so heavy hits read.

390/390 EditMode, clean compile + Play (no exceptions; per-frame footstep/rumble-tick paths verified). On-screen
feel is the operator's eyes. Deferred (focused follow-ups): true material body hit-flash (ShaderGraph), co-op
remote-swing rendering, near-impact telegraph beep (clip reserved).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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

@@ -109,6 +109,32 @@ namespace ProjectM.Client
         /// Health flicker on a clean dodge — the documented acceptable-not-a-bug interaction).</summary>
         public static bool DashHitSuppress;
 
+        // ---- Combat feel pass (2026-06): connect cue, hit-flash, kill pop, footsteps, rumble, telegraph beep ----
+        /// <summary>Hit-flash puff density (a colored particle burst in HitFlashColor on an enemy damage edge).</summary>
+        public static int HitFlashBurstCount;
+        /// <summary>Extra FOV punch (deg) when the LOCAL melee cleave is confirmed to connect (vs a whiff).</summary>
+        public static float MeleeConnectFovKick;
+        /// <summary>Volume of the meaty melee connect "thunk".</summary>
+        public static float MeleeConnectVolume;
+        /// <summary>Kill-pop colored flash density on an enemy death.</summary>
+        public static int KillFlashBurstCount;
+        /// <summary>Soft footstep SFX volume.</summary>
+        public static float FootstepVolume;
+        /// <summary>Seconds between footsteps while the local player is moving.</summary>
+        public static float FootstepIntervalSec;
+        /// <summary>Local player speed (u/s) above which footsteps play.</summary>
+        public static float FootstepMinSpeed;
+        /// <summary>Master gate for gamepad rumble (no-op on KBM).</summary>
+        public static bool RumbleEnabled;
+        /// <summary>Rumble strength on a local hit taken / dealt.</summary>
+        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;
+
         [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
         public static void ResetDefaults()
         {
@@ -161,6 +187,20 @@ namespace ProjectM.Client
             DashSfxVolume = 0.55f;
             DashShimmerPerFrame = 2;
             DashHitSuppress = true;
+
+            // Combat feel pass (2026-06)
+            HitFlashBurstCount = 16;
+            MeleeConnectFovKick = 0.8f;
+            MeleeConnectVolume = 0.55f;
+            KillFlashBurstCount = 20;
+            FootstepVolume = 0.16f;
+            FootstepIntervalSec = 0.32f;
+            FootstepMinSpeed = 1.5f;
+            RumbleEnabled = true;
+            RumbleHit = 0.25f;
+            RumbleKill = 0.45f;
+            RumbleHeavy = 0.6f;
+            RumbleDurationSec = 0.12f;
         }
     }
 }