Clear designation tile-highlight when jobs complete

Each entity completion handler (wall/floor/door/bed/torch/workbench/crate
/tree/rock/big_rock/grave_slot) now calls World.clear_designation_at(tile)
so the orange/blue/etc. highlight overlay disappears with the job.
BigRock iterates its footprint to clear all four tiles.

World.designation_ctl is set during the scene boot wire-up; the helper
no-ops when the controller is absent (e.g. headless tests).

autoload/world.gd

@@ -28,6 +28,11 @@ var stockpiles: Array = []     # Array of StorageDestination (StockpileZone for
 # its _ready(). Don't access before the world scene is mounted.
 var pathfinder = null
 
+## Reference to the in-scene Designation controller. Wired by world.gd _ready
+## so entities completing a job can call World.clear_designation_at(tile) to
+## remove the lingering ghost paint without depending on the scene tree path.
+var designation_ctl = null
+
 # Phase 5 — build queue. Holds Wall/Floor/Door/Crate ghost entities (not yet
 # completed). ConstructionProvider iterates this for the nearest buildable site.
 # Entities call register_build_site() in _ready and unregister_build_site() when
@@ -83,6 +88,14 @@ var grave_markers: Array = []
 var items_needing_haul: Dictionary = {}
 
 
+## Clear the designation ghost at `tile`, if any. Entities call this from
+## their _complete / fell / mined handlers so the visual highlight disappears
+## once the job is done. Safe no-op if designation_ctl isn't wired (headless).
+func clear_designation_at(tile: Vector2i) -> void:
+	if designation_ctl != null:
+		designation_ctl.clear_cell(tile)
+
+
 func register_work_provider(wp) -> void:
 	assert(wp != null, "World.register_work_provider: provider is null")
 	if not work_providers.has(wp):

scenes/entities/bed.gd

@@ -279,6 +279,7 @@ func _complete() -> void:
 	if sprite != null:
 		sprite.modulate.a = 1.0
 	queue_redraw()
+	World.clear_designation_at(tile)
 	Audit.log("bed", "%s built at %s" % [label_text, tile])
 	# Phase 13 — notify BeautySystem so nearby tile beauty scores update.
 	var bs = World.get("beauty_system")

scenes/entities/big_rock.gd

@@ -149,6 +149,9 @@ func mined() -> void:
 	Audit.log("big_rock", "mined 2×2 at %s; %d stone drops" % [origin_tile, STONE_DROPS_ON_MINE])
 	if Audio != null:
 		Audio.play_sfx(&"mine_tick")
+	# BigRocks span 2×2 — clear the designation stamp from every footprint tile.
+	for ft in footprint_tiles():
+		World.clear_designation_at(ft)
 	queue_free()
 
 

scenes/entities/door.gd

@@ -181,4 +181,5 @@ func _complete() -> void:
 	if sprite != null:
 		sprite.modulate.a = 1.0
 	queue_redraw()
+	World.clear_designation_at(tile)
 	Audit.log("door", "door completed at %s" % tile)

scenes/entities/floor.gd

@@ -172,4 +172,5 @@ func _complete() -> void:
 	# Floors do NOT block pathfinding — no pathfinder call here.
 	World.mark_floor_tile(tile, floor_material)
 	queue_redraw()
+	World.clear_designation_at(tile)
 	Audit.log("floor", "%s floor completed at %s" % [floor_material, tile])

scenes/entities/grave_slot.gd

@@ -224,4 +224,5 @@ func from_dict(d: Dictionary) -> void:
 func _complete_dig() -> void:
 	_dug = true
 	queue_redraw()
+	World.clear_designation_at(tile)
 	Audit.log("grave_slot", "grave dug at %s (ready for burial)" % tile)

scenes/entities/rock.gd

@@ -124,6 +124,7 @@ func mined() -> void:
 	Audit.log("rock", "mined at %s; %d stone drop" % [tile, STONE_DROPS_ON_MINE])
 	if Audio != null:
 		Audio.play_sfx(&"mine_tick")
+	World.clear_designation_at(tile)
 	queue_free()
 
 

scenes/entities/torch.gd

@@ -245,6 +245,7 @@ func _complete() -> void:
 	if _light != null:
 		_light.enabled = _is_on
 	queue_redraw()
+	World.clear_designation_at(tile)
 	Audit.log("torch", "built at %s" % tile)
 	# Phase 13 — notify BeautySystem so nearby tile beauty scores update.
 	var bs = World.get("beauty_system")

scenes/entities/tree.gd

@@ -119,6 +119,7 @@ func fell() -> void:
 	Audit.log("tree", "felled at %s; %d wood drops" % [tile, drops_count])
 	if Audio != null:
 		Audio.play_sfx(&"tree_fell")
+	World.clear_designation_at(tile)
 	queue_free()
 
 

scenes/entities/wall.gd

@@ -241,4 +241,5 @@ func _complete() -> void:
 	queue_redraw()
 
 	queue_redraw()
+	World.clear_designation_at(tile)
 	Audit.log("wall", "%s wall completed at %s" % [wall_material, tile])

scenes/entities/workbench.gd

@@ -419,6 +419,7 @@ func _complete() -> void:
 	if _light != null:
 		_light.enabled = is_on()
 	queue_redraw()
+	World.clear_designation_at(tile)
 	Audit.log("workbench", "%s built at %s" % [label_text, tile])
 	# Phase 13 — notify BeautySystem so nearby tile beauty scores update.
 	# Hearth gets base beauty 4 (warm glow); other benches get 1.

scenes/world/crate.gd

@@ -143,6 +143,7 @@ func on_build_tick() -> void:
 	if build_progress >= BUILD_TICKS:
 		_completed = true
 		emit_signal("contents_changed")
+		World.clear_designation_at(tile)
 		Audit.log("crate", "built at %s (capacity %d)" % [tile, CAPACITY])
 	queue_redraw()
 

scenes/world/world.gd

@@ -185,6 +185,9 @@ func _ready() -> void:
 
 	# Designation: bind the paint surface + the Selection guard.
 	designation_ctl.bind(designation_layer, selection)
+	# Expose on the autoload so entities can clear their ghost stamp on
+	# completion (Tree.fell, Wall._complete, etc.).
+	World.designation_ctl = designation_ctl
 
 	# Register all 10 providers — Decision iterates by .priority desc.
 	# doctor=9 > sleep=8 > eat=7 > construction=6 > chop=5 ≈ plant=5 > mine=4