feat: display upcoming trains and delay info on monitor

station_broadcast.lua

@@ -2101,6 +2101,23 @@ function Display.render()
         end
     end
     
+    -- Upcoming Trains
+    if State.upcomingTrains and #State.upcomingTrains > 0 then
+        local startY = State.currentTrain and 11 or 7
+        mon.setCursorPos(1, startY)
+        mon.setTextColor(COLORS.DEBUG)
+        mon.write("UPCOMING TRAINS:")
+        mon.setTextColor(COLORS.INFO)
+        for i = 1, math.min(3, #State.upcomingTrains) do
+            local t = State.upcomingTrains[i]
+            mon.setCursorPos(1, startY + i)
+            local delayStr = t.delay > 0 and (" [+" .. t.delay .. "m]") or ""
+            local lineText = string.format("%s->%s ETA:%ds%s", t.trainName, t.dest, t.eta, delayStr)
+            if #lineText > w then lineText = lineText:sub(1, w) end
+            mon.write(lineText)
+        end
+    end
+    
     -- Logs
     local y = h - 3
     for i = 1, 3 do
@@ -2242,6 +2259,7 @@ State.pendingApproaching = {}
 function Main.loop()
     while true do
         local now = os.epoch("utc")
+        local newUpcoming = {}
 
         -- Check Block Reader (Advanced Peripherals) first for precise ETA and Delay
         if Peripherals.blockReader then
@@ -2273,12 +2291,21 @@ function Main.loop()
                         local realArrival = st.RealTimeArrival or 0
                         local etaTicks = realArrival - currentTick
                         local etaSeconds = math.floor(etaTicks / 20)
+                        if etaSeconds < 0 then etaSeconds = 0 end
                         
                         -- Calculate Delay in minutes
                         local delayTicks = realArrival - scheduledArrival
                         local delayMinutes = math.floor(delayTicks / (20 * 60))
                         if delayMinutes < 0 then delayMinutes = 0 end
                         
+                        table.insert(newUpcoming, {
+                            trainName = trainName,
+                            dest = destination,
+                            platform = platform,
+                            eta = etaSeconds,
+                            delay = delayMinutes
+                        })
+                        
                         if etaSeconds >= 0 and etaSeconds <= 45 then
                             local announceKey = trainName .. "_" .. destination
                             if not State.announcedApproaching[announceKey] then
@@ -2348,6 +2375,14 @@ function Main.loop()
                                 end
                             end
                         end
+                        
+                        table.insert(newUpcoming, {
+                            trainName = tName,
+                            dest = dest,
+                            platform = platform or State.stationPlatform or "1",
+                            eta = etaSeconds >= 0 and etaSeconds or 0,
+                            delay = delay
+                        })
 
                         -- 触发逻辑：当 ETA 已经明确 <= 45秒（包括30秒、15秒、现在等），且之前没有播报过
                         if etaSeconds >= 0 and etaSeconds <= 45 then
@@ -2374,6 +2409,7 @@ function Main.loop()
 
         if not Peripherals.station then
             State.currentTrain = nil
+            State.upcomingTrains = newUpcoming
             Display.render()
             Display.renderTerminal()
             os.sleep(0.5)
@@ -2436,6 +2472,7 @@ function Main.loop()
             end
         end
         
+        State.upcomingTrains = newUpcoming
         Display.render()
         Display.renderTerminal()
         os.sleep(0.5)