fix: card attachments now deserialized and serialized robustly, e.g. when board closed while dragging

src/logic-scenes/board/card-board.gd

@@ -144,16 +144,50 @@ func _on_board_focused() -> void:
 		give_lore_feedback()
 
 
+## Finalizes board state before closing (ends drags, cleans up transitions)
+func _finalize_board_state() -> void:
+	print_debug("CardBoard: Finalizing board state before closing (context: %d)" % current_context)
+
+	# End any active drag operations
+	if current_context == DRAG and is_instance_valid(currently_active_node):
+		if currently_active_node.is_dragged:
+			print_debug("  Ending active drag for: %s" % currently_active_node.name)
+			_end_drag(currently_active_node)
+
+	# Stop dragging for all items (safety net in case _end_drag didn't catch everything)
+	for child in dropzone.get_children():
+		if (child is Card or child is StickyNote) and child.is_dragged:
+			print_debug("  Force-stopping drag for: %s" % child.name)
+			child.is_dragged = false
+
+	# Also check cards for attached stickies that might be dragged
+	for child in dropzone.get_children():
+		if child is Card:
+			var attached_sticky = child.get_attached_sticky_note()
+			if attached_sticky and attached_sticky.is_dragged:
+				print_debug("  Force-stopping drag for attached sticky: %s" % attached_sticky.name)
+				attached_sticky.is_dragged = false
+
+	# Return stickies to panels if in ASSIGN mode
+	if current_context == ASSIGN:
+		print_debug("  Returning stickies to panels (was in ASSIGN mode)")
+		_return_sticky_notes_to_panels()
+
+	# Reset context to NAVIGATE
+	current_context = NAVIGATE
+
+	print_debug("CardBoard: Board state finalized")
+
+
 ## Called when board loses focus
 func _on_board_unfocused() -> void:
 	visible = false
 	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
 	if is_node_ready():
+		# Finalize any drag operations before closing
+		_finalize_board_state()
+
 		process_mode = Node.PROCESS_MODE_DISABLED
-		# Stop any active dragging
-		for sticky in dropzone.get_children():
-			if sticky is StickyNote:
-				sticky.is_dragged = false
 
 
 func reclaim_lost_focus(_thief):