feat: emotive animations + anime speed lines — hit flinch, dance emote (B)

- SkinnedPlayerModel: generic play_oneshot() (generalizes the Land lock),
  Hit and Dance in the clip table (Dance loops), restartable clips
- Hit flinch: victims visibly react on every peer's screen via the existing
  damage broadcast — no new RPC
- Dance emote on B: toggles while grounded and idle, breaks on any movement;
  synced to remotes via synced_is_dancing (all three spawner configs)
- Anime radial speed-lines overlay (canvas shader): fades in past ~1.2x walk
  speed, spikes on dash, widescreen-corrected clear center
- New input action 'emote' (B) in project.godot

11/11 FSM tests, spawn smoke 0 failures.

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

characters/skinned_player_model.gd

@@ -44,10 +44,12 @@ const CLIP_FALLBACKS := {
 	"Grapple": ["Grapple", "Fall", "Jump", "Idle"],
 	"Dash": ["Dash", "Sprint", "Run", "Idle"],
 	"Death": ["Death", "Fall"],
+	"Hit": ["Hit", "Idle"],
+	"Dance": ["Dance", "Idle"],
 }
 
 const LOOPING_CLIPS := ["Idle", "Walk", "Run", "Sprint", "Fall", "Crouch",
-	"CrouchIdle", "CrouchWalk", "Slide", "WallRun", "WallCling", "Grapple"]
+	"CrouchIdle", "CrouchWalk", "Slide", "WallRun", "WallCling", "Grapple", "Dance"]
 
 const BLEND_TIME := 0.15
 
@@ -191,7 +193,23 @@ func _set_shadow_mode_recursive(node: Node, mode: int) -> void:
 # ── Animation state ───────────────────────────────────────────────────────────
 
 var _prev_state: String = ""
-var _land_lock: float = 0.0  # seconds left where the Land one-shot owns playback
+var _oneshot_lock: float = 0.0  # seconds left where a one-shot owns playback
+var _dancing: bool = false
+
+
+## Play a one-shot clip (Hit reaction, Land, ...) over locomotion for
+## `lock_time` seconds; locomotion resumes afterwards.
+func play_oneshot(canonical: String, lock_time: float = 0.35) -> void:
+	if not loaded or not _resolved_clips.has(canonical):
+		return
+	_oneshot_lock = lock_time
+	_play_clip(canonical, true)
+
+
+## Emote toggle (Dance). Shown while grounded and near-idle; any real
+## movement breaks it (the controller clears the flag too).
+func set_dancing(on: bool) -> void:
+	_dancing = on
 
 
 ## Same contract as HumanoidModel.update_state(). Called by the movement
@@ -200,15 +218,16 @@ func update_state(state: String, speed: float, is_crouching: bool = false) -> vo
 	if not loaded or not animation_player:
 		return
 
-	# A heavy landing plays the Land one-shot before locomotion resumes.
-	if _land_lock > 0.0:
-		_land_lock -= get_process_delta_time()
-		if _land_lock > 0.0 and state in ["ground", "idle"]:
+	# One-shots (Land, Hit) own playback briefly.
+	if _oneshot_lock > 0.0:
+		_oneshot_lock -= get_process_delta_time()
+		if _oneshot_lock > 0.0:
 			_prev_state = state
 			return
+	# A heavy landing plays the Land one-shot before locomotion resumes.
 	if state in ["ground", "idle"] and _prev_state == "air" \
 			and _vertical_speed() < -12.0 and _resolved_clips.has("Land"):
-		_land_lock = 0.25
+		_oneshot_lock = 0.25
 		_play_clip("Land")
 		_prev_state = state
 		return
@@ -217,7 +236,9 @@ func update_state(state: String, speed: float, is_crouching: bool = false) -> vo
 	var clip := "Idle"
 	match state:
 		"ground", "idle":
-			if is_crouching:
+			if _dancing and speed < 0.5 and not is_crouching:
+				clip = "Dance"
+			elif is_crouching:
 				clip = "CrouchWalk" if speed > 0.5 else "Crouch"
 			elif speed > run_anim_reference_speed * 1.35:
 				clip = "Sprint"
@@ -291,12 +312,14 @@ func _process(delta: float) -> void:
 	_pose_mod.wall = _cur_wall
 
 
-func _play_clip(canonical: String) -> void:
+func _play_clip(canonical: String, restart: bool = false) -> void:
 	if not animation_player or not _resolved_clips.has(canonical):
 		return
 	var clip_name: String = _resolved_clips[canonical]
-	if _current_clip == clip_name and animation_player.is_playing():
+	if not restart and _current_clip == clip_name and animation_player.is_playing():
 		return
+	if restart:
+		animation_player.stop()
 	animation_player.play(clip_name, BLEND_TIME)
 	_current_clip = clip_name