fix(editor): move build stamp to bottom, expand palette list, add hover feedback and instructions

scripts/game.gd

@@ -85,7 +85,11 @@ func _toggle_build_mode() -> void:
 
 
 func _open_build_mode() -> void:
-	var model := ChunkEditorModel.create_empty(32, 32, str(Session.world_id), "main")
+	var world_id_str := str(Session.world_id) if Session.world_id != null else "0"
+	var room_slug := "main"
+	var coord := Vector3i.ZERO
+
+	var model := ChunkEditorModel.create_empty(32, 32, world_id_str, room_slug, coord)
 	var catalog := EditorObjectCatalog.new()
 	var err := catalog.load_catalog()
 	if err != OK:
@@ -93,6 +97,13 @@ func _open_build_mode() -> void:
 	var core := EditorCore.new(model, catalog)
 
 	_build_editor = InGameEditor.new(core)
+	if int(world_id_str) > 0:
+		var save_service := ChunkSaveService.new()
+		save_service.world_id = world_id_str
+		save_service.room_slug = room_slug
+		add_child(save_service)
+		_build_editor.setup_persistence(save_service, world_id_str, room_slug, coord, 0)
+
 	_build_editor.closed.connect(_close_build_mode)
 	add_child(_build_editor)
 
@@ -109,6 +120,9 @@ func _close_build_mode() -> void:
 	if _build_editor != null and is_instance_valid(_build_editor):
 		_build_editor.queue_free()
 	_build_editor = null
+	for child in get_children():
+		if child is ChunkSaveService:
+			child.queue_free()
 	_player.set_physics_process(true)
 	_player.set_process_unhandled_input(true)
 	_player._refresh_mouse_mode()
@@ -210,19 +224,18 @@ func _show_build_stamp() -> void:
 	add_child(layer)
 	var lbl := Label.new()
 	lbl.text = "build %s" % _build_label()
-	lbl.add_theme_color_override("font_color", Color(1, 1, 0.35))
+	lbl.add_theme_color_override("font_color", Color(1, 1, 0.35, 0.85))
 	lbl.add_theme_color_override("font_outline_color", Color(0, 0, 0, 1))
-	lbl.add_theme_constant_override("outline_size", 6)
-	lbl.add_theme_font_size_override("font_size", 20)
-	# Full-width strip pinned to the TOP-left. (A bare preset + .position on a
-	# zero-size Label collapses the rect to negative width and nothing draws --
-	# which is why this never showed; explicit offsets fix it.)
-	lbl.set_anchors_preset(Control.PRESET_TOP_WIDE)
-	lbl.horizontal_alignment = HORIZONTAL_ALIGNMENT_LEFT
+	lbl.add_theme_constant_override("outline_size", 4)
+	lbl.add_theme_font_size_override("font_size", 14)
+	# Pinned to the BOTTOM-right so it never blocks top menu or editor toolbars.
+	lbl.set_anchors_preset(Control.PRESET_BOTTOM_WIDE)
+	lbl.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
+	lbl.vertical_alignment = VERTICAL_ALIGNMENT_BOTTOM
 	lbl.offset_left = 12
-	lbl.offset_right = -12
-	lbl.offset_top = 8
-	lbl.offset_bottom = 40
+	lbl.offset_right = -16
+	lbl.offset_top = -32
+	lbl.offset_bottom = -8
 	lbl.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	layer.add_child(lbl)