debug: log draw errors instead of silent pcall swallowing

inventoryManager.lua

@@ -412,7 +412,8 @@ local function main()
             while true do
                 if state.needsRedraw then
                     state.needsRedraw = false
-                    pcall(display.drawDashboard)
+                    local dok, derr = pcall(display.drawDashboard)
+                    if not dok then log.error("DRAW", "Dashboard: %s", tostring(derr)) end
                 end
                 if state.statusTimer > 0 then
                     state.statusTimer = state.statusTimer - 0.1
@@ -434,7 +435,8 @@ local function main()
             while true do
                 if state.smelterNeedsRedraw then
                     state.smelterNeedsRedraw = false
-                    pcall(display.drawSmelterDashboard)
+                    local sok, serr = pcall(display.drawSmelterDashboard)
+                    if not sok then log.error("DRAW", "Smelter: %s", tostring(serr)) end
                 end
                 sleep(0.1)
             end