feat: overhaul movement for flow — momentum-preserving states, smooth crouch, landing feel

- Quake-style air-strafe accelerate (real speed gain from strafing; external
  speed from dash/rockets never clamped)
- Wall run: keeps entry momentum (incl. upward carry), accelerates along the
  wall instead of hard-setting velocity, gravity fades in over the run
- Slide: slope physics (gravity projected along floor accelerates downhill),
  flat-ground decel instead of multiplicative friction, entry boost, direct
  slide->wallrun and slide->dash transitions
- Dash: cooldown 10s -> 2s, per-player (was a static shared across instances),
  momentum fully kept on exit, FOV punch event
- Grapple: taut pendulum with active rope control (W reels in, S pays out),
  release keeps swing energy
- Wall climb: carries upward momentum in, jump-off kick, shared vault helper
- Crouch capsule: single owner in the machine, smoothly lerped, ceiling check;
  camera eye height follows via crouch factor (no more head snapping)
- Landing: machine emits 'land' events scaled by impact; camera dip + pitched
  down thud; footsteps get pitch variation
- Camera rig: event-driven (land dip, dash FOV kick, vault pitch impulse),
  slide roll tilt
- Model: Jump vs Fall split by vertical velocity, Land one-shot on heavy
  landings, wall-run body lean (synced to remotes via synced_wall_side)

Co-Authored-By: Claude Fable 5 <[email protected]>

movement/states/state_wall_climb.gd

@@ -15,10 +15,10 @@ func enter(_data: Dictionary = {}) -> void:
 	if machine.player.wallrun_player and not machine.player.wallrun_player.playing:
 		machine.player.wallrun_player.play()
 
-	# Give an initial upward boost
+	# Carry existing upward momentum into the climb so jump→climb chains flow
 	var player := machine.player
-	player.velocity.y = params.wall_climb_speed
-	
+	player.velocity.y = maxf(player.velocity.y, params.wall_climb_speed)
+
 	var hvel := Vector3(player.velocity.x, 0.0, player.velocity.z)
 	player.velocity.x = hvel.x * 0.5
 	player.velocity.z = hvel.z * 0.5
@@ -30,7 +30,7 @@ func exit() -> void:
 func update(delta: float) -> void:
 	elapsed += delta
 	var player := machine.player
-	
+
 	if player.wallrun_player and not player.wallrun_player.playing:
 		player.wallrun_player.play()
 
@@ -39,15 +39,15 @@ func update(delta: float) -> void:
 		_detach()
 		return
 
-	# ── Look/Move away to transition to wall run ──────────────────────────────
+	# ── Look/Move away to transition to wall run ──────────────────────────
 	var look_dir := -player.global_transform.basis.z
 	var wish_dir := machine.wish_dir_world
-	
+
 	var looking_towards := look_dir.dot(-machine.wall_normal) > 0.0
 	var moving_sideways := false
 	if wish_dir.length_squared() > 0.01:
 		moving_sideways = wish_dir.dot(-machine.wall_normal) <= cos(deg_to_rad(params.wall_climb_max_angle))
-		
+
 	if not looking_towards or moving_sideways:
 		# We are looking away or moving sideways, transition to wall run
 		# The wall run state will figure out tangent and side
@@ -58,22 +58,36 @@ func update(delta: float) -> void:
 		else:
 			_detach()
 			return
-			
+
+	# ── Jump off the wall (backward kick) ─────────────────────────────────
+	if machine.input_jump_just_pressed and machine.jump_cooldown_timer <= 0.0:
+		player.velocity = machine.wall_normal * params.wall_run_jump_off_normal
+		player.velocity.y = params.jump_velocity
+		machine.register_chain_mechanic("wall_jump")
+		machine.jump_cooldown_timer = params.jump_cooldown
+		machine.movement_event.emit("jump", {})
+		if player.jump_player:
+			player.jump_player.play()
+		_detach()
+		return
+
 	# ── Ledge Vault Check ─────────────────────────────────────────────────
 	var fwd_wall = machine.detect_wall_forward()
 	if not fwd_wall.hit:
 		# The forward lower ray missed, we fell off the wall completely
 		_detach()
 		return
-	
+
 	if fwd_wall.is_short:
 		# The upper ray missed, meaning we reached the top of the wall!
-		_vault()
+		machine.do_vault()
+		machine.wall_normal = Vector3.ZERO
+		machine.wall_side = 0.0
+		machine.switch_to("air")
 		return
 
-	# ── Movement ──────────────────────────────────────────────────────────
-	# Slow down over time
-	var speed_factor = maxf(0.0, 1.0 - (elapsed / params.wall_climb_duration))
+	# ── Movement: ease out over the climb ─────────────────────────────────
+	var speed_factor: float = pow(maxf(0.0, 1.0 - (elapsed / params.wall_climb_duration)), 0.7)
 	player.velocity.y = params.wall_climb_speed * speed_factor
 
 	# Push slightly into the wall to maintain contact
@@ -95,31 +109,3 @@ func _detach() -> void:
 	machine.wall_cooldown_timer = 0.3
 	machine.can_wall_climb = false
 	machine.switch_to("air")
-
-func _vault() -> void:
-	var player := machine.player
-	var look_dir := -player.global_transform.basis.z
-	var h_look := Vector3(look_dir.x, 0.0, look_dir.z)
-	if h_look.length_squared() > 0.01:
-		h_look = h_look.normalized()
-	
-	# Impulse
-	player.velocity = h_look * params.wall_climb_vault_forward
-	player.velocity.y = params.wall_climb_vault_up
-	
-	if player.vault_player:
-		player.vault_player.play()
-		
-	# Quick camera animation (tilt up and forward bob)
-	var camera = player.camera
-	if camera:
-		var tween = player.create_tween()
-		tween.tween_property(camera, "rotation_degrees:x", camera.rotation_degrees.x + 10.0, 0.15).set_trans(Tween.TRANS_SINE)
-		tween.parallel().tween_property(camera, "v_offset", -0.2, 0.15).set_trans(Tween.TRANS_SINE)
-		tween.chain().tween_property(camera, "rotation_degrees:x", camera.rotation_degrees.x, 0.2).set_trans(Tween.TRANS_SINE)
-		tween.parallel().tween_property(camera, "v_offset", 0.0, 0.2).set_trans(Tween.TRANS_SINE)
-
-	machine.wall_normal = Vector3.ZERO
-	machine.wall_side = 0.0
-	machine.wall_cooldown_timer = 0.3
-	machine.switch_to("air")