new file structure

inc/background.alley.go

@@ -0,0 +1,17 @@
+package inc
+
+import (
+	inkwell "git.teletypegames.org/engines/inkwell"
+)
+
+// alley — part of the catalogue's "Noodle háza & a sikátor" row — not in the deck.
+//
+// Not painted yet: the file is missing on purpose, and inkwell draws its
+// placeholder instead — which is exactly the greybox convention.
+func backgroundAlley() inkwell.Asset {
+	return inkwell.Asset{
+		Name: BgAlley,
+		Path: "assets/bg/alley.png",
+		Kind: inkwell.AssetImage,
+	}
+}