eh fixes

Assets/lua/npc.lua

@@ -2,7 +2,7 @@
 -- npc.lua - NPC with multi-line dialogue
 -- ============================================================================
 -- Tests: onInteract, onButtonPress, Controls, UI text,
---        scene-level dialogue system, Input constants
+--        scene-level dialogue system, Input constants, Interact API
 
 local talked = false
 
@@ -13,6 +13,9 @@ end
 function onInteract(self)
     if isInDialogue() then return end
 
+    -- Disable interaction while dialogue is open so the prompt hides
+    Interact.SetEnabled(self, false)
+
     if not talked then
         talked = true
         startDialogue({
@@ -36,5 +39,9 @@ function onButtonPress(self, button)
     if not isInDialogue() then return end
     if button == Input.CROSS then
         advanceDialogue()
+        -- Re-enable interaction when dialogue ends
+        if not isInDialogue() then
+            Interact.SetEnabled(self, true)
+        end
     end
 end