feat: remove unused catalogue from state cache and update message handling for dropper data

inventoryClient.lua

@@ -120,7 +120,6 @@ end
 local state = {}
 
 state.cache = {
-    catalogue   = {},
     itemList    = {},
     itemListDirty = false,
     grandTotal  = 0,
@@ -392,10 +391,8 @@ local function main()
                         c.barrelOk      = message.cache.barrelOk
                         c.furnaceCount  = message.cache.furnaceCount  ~= nil and message.cache.furnaceCount or c.furnaceCount
                         c.furnaceStatus = message.cache.furnaceStatus or c.furnaceStatus
-                        -- Also build catalogue from itemList so display.lua
-                        -- smelter tab can look up stock by item name
-                        if message.cache.catalogue then
-                            c.catalogue = message.cache.catalogue
+                        if message.cache.droppers then
+                            c.droppers = message.cache.droppers
                         end
                     end
                     if message.activity then