Harden installer icon + NSIS rebuild path

- Regenerate icon.ico with classic BMP entries (16/32/48) — PNG-compressed
  ICO entries can fail NSIS' icon loader on some builds
- CI copies assets/textures/icon.ico onto the packaging path right before
  makensis, removing any stale/missing-copy failures
- Recreate v0.2.1 tag after this fix

src/game/ui/radio_panel.gd

@@ -34,9 +34,12 @@ func _init() -> void:
 	dim.set_anchors_preset(Control.PRESET_FULL_RECT)
 	add_child(dim)
 
+	var center := CenterContainer.new()
+	center.set_anchors_preset(Control.PRESET_FULL_RECT)
+	center.mouse_filter = Control.MOUSE_FILTER_IGNORE
+	add_child(center)
 	panel = PanelContainer.new()
-	panel.set_anchors_preset(Control.PRESET_CENTER)
-	add_child(panel)
+	center.add_child(panel)
 
 	var vbox := VBoxContainer.new()
 	panel.add_child(vbox)