The inventory UI is too narrow. Make it wider.

- Added `custom_minimum_size = Vector2(800, 600)` to the Inventory
  root `PanelContainer`, matching the debug settings UI dimensions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: manuq

scenes/ui_elements/inventory/inventory.tscn

@@ -5,6 +5,7 @@
 [ext_resource type="Texture2D" uid="uid://xe25gqovxxpe" path="res://assets/first_party/icons/left_arrow.png" id="3_arrow"]
 
 [node name="Inventory" type="PanelContainer"]
+custom_minimum_size = Vector2(800, 600)
 anchors_preset = 15
 anchor_right = 1.0
 anchor_bottom = 1.0