Add progress display during inventory scanning in refreshCache function

inventoryManager.lua

@@ -168,7 +168,8 @@ local function scanInventory(deviceName)
 end
 
 -- Full scan: updates the global cache
-local function refreshCache()
+-- onProgress(current, total, chestName) is called per chest if provided
+local function refreshCache(onProgress)
     activity.scanning = true
 
     local chests = getChests()
@@ -176,7 +177,8 @@ local function refreshCache()
     local totalSlots = 0
     local usedSlots = 0
 
-    for _, chest in ipairs(chests) do
+    for ci, chest in ipairs(chests) do
+        if onProgress then onProgress(ci, #chests, chest) end
         local inv = peripheral.wrap(chest)
         if inv then
             totalSlots = totalSlots + inv.size()
@@ -1015,9 +1017,72 @@ local function main()
     print("Console shows log. Use the monitor to interact.")
     print("")
 
-    -- Initial scan before starting
+    -- Initial scan with progress bar on monitor
     print("[INIT] Scanning inventories...")
-    refreshCache()
+    if mon then
+        local w, h = mon.getSize()
+        local buf = window.create(mon, 1, 1, w, h, false)
+
+        local function drawBoot(current, total, chestName)
+            buf.setBackgroundColor(colors.black)
+            buf.clear()
+
+            -- Title
+            buf.setBackgroundColor(colors.blue)
+            buf.setCursorPos(1, 1)
+            buf.write(string.rep(" ", w))
+            local title = " INVENTORY MANAGER "
+            buf.setCursorPos(math.floor((w - #title) / 2) + 1, 1)
+            buf.setTextColor(colors.white)
+            buf.write(title)
+
+            -- Scanning label
+            local midY = math.floor(h / 2)
+            buf.setBackgroundColor(colors.black)
+            buf.setTextColor(colors.lightGray)
+            local label = "Scanning inventories..."
+            buf.setCursorPos(math.floor((w - #label) / 2) + 1, midY - 2)
+            buf.write(label)
+
+            -- Chest name
+            local short = chestName or ""
+            if #short > w - 4 then short = ".." .. short:sub(-(w - 6)) end
+            buf.setTextColor(colors.gray)
+            buf.setCursorPos(math.floor((w - #short) / 2) + 1, midY - 1)
+            buf.write(short)
+
+            -- Progress bar
+            local barW = math.min(w - 8, 40)
+            local barX = math.floor((w - barW) / 2) + 1
+            local ratio = total > 0 and (current / total) or 0
+            local filled = math.floor(ratio * barW)
+
+            buf.setCursorPos(barX, midY + 1)
+            buf.setBackgroundColor(colors.lime)
+            buf.write(string.rep(" ", filled))
+            buf.setBackgroundColor(colors.gray)
+            buf.write(string.rep(" ", barW - filled))
+
+            -- Percentage + count
+            buf.setBackgroundColor(colors.black)
+            buf.setTextColor(colors.white)
+            local pct = string.format("%d/%d  (%d%%)", current, total, math.floor(ratio * 100))
+            buf.setCursorPos(math.floor((w - #pct) / 2) + 1, midY + 3)
+            buf.write(pct)
+
+            -- Bottom accent
+            buf.setCursorPos(1, h)
+            buf.setBackgroundColor(colors.blue)
+            buf.write(string.rep(" ", w))
+
+            buf.setVisible(true)
+            buf.setVisible(false)
+        end
+
+        refreshCache(drawBoot)
+    else
+        refreshCache()
+    end
     print("[INIT] Done. Found " .. #cache.itemList .. " item types.")
     print("")