feat: 新增错误问题追踪与管理功能

- 升级程序版本至 v1.5.25
- 新增对比度文本颜色计算与垂直滚动条绘制工具函数，优化选择界面滚动显示
- 网页端新增问题记录管理页面，配套完整的表格与详情展示样式
- 实现issue记录标准化处理、实时事件推送接收与按时间倒序排序展示
- 重构原有选择界面的滚动逻辑，替换为通用滚动条绘制函数

ticketmachine.lua

@@ -1,6 +1,6 @@
 local CURRENT_STATION_CODE = 'Ticket-Machine'
 local API_BASE = 'https://ticket.fse-media.group/api'
-local VERSION = 'v1.5.24'
+local VERSION = 'v1.5.25'
 local UPDATE_CHECK_INTERVAL = 5
 
 -- ###########################
@@ -1081,6 +1081,16 @@ local function nearestCCColor(val)
   return colors.gray
 end
 
+local function contrastTextColor(bg)
+  for _, c in ipairs(CC_PALETTE) do
+    if c.val == bg then
+      local yiq = (c.rgb[1] * 299 + c.rgb[2] * 587 + c.rgb[3] * 114) / 1000
+      return yiq >= 140 and colors.black or colors.white
+    end
+  end
+  return colors.white
+end
+
 local function clear()
   termDev.setBackgroundColor(colors.black)
   termDev.clear()
@@ -1115,6 +1125,31 @@ local function addButton(x, y, label, wBtn, hBtn, colorsPair, onClick)
   termDev.write(label)
 end
 
+local function drawVerticalScrollbar(sbX, startY, endY, offset, maxOffset, step, onUp, onDown)
+  addButton(sbX, startY - 1, '^', 3, 1, {colors.black, colors.white}, onUp)
+  addButton(sbX, endY + 1, 'v', 3, 1, {colors.black, colors.white}, onDown)
+  for py = startY, endY do
+    termDev.setBackgroundColor(colors.black)
+    termDev.setCursorPos(sbX, py)
+    termDev.write('   ')
+    termDev.setBackgroundColor(colors.gray)
+    termDev.setCursorPos(sbX, py)
+    termDev.write('   ')
+  end
+  if maxOffset <= 0 then
+    return
+  end
+  local railH = endY - startY + 1
+  local thumbH = math.max(2, math.floor((railH * railH) / (railH + maxOffset)))
+  if thumbH > railH then thumbH = railH end
+  local thumbY = startY + math.floor((railH - thumbH) * (offset / maxOffset))
+  for py = thumbY, thumbY + thumbH - 1 do
+    termDev.setBackgroundColor(colors.lightGray)
+    termDev.setCursorPos(sbX, py)
+    termDev.write('   ')
+  end
+end
+
 local function inRect(btn, px, py)
   return px >= btn.x and px <= (btn.x + btn.w - 1) and py >= btn.y and py <= (btn.y + btn.h - 1)
 end
@@ -1381,8 +1416,12 @@ local function showSingleSegmentSelection()
     local startIdx = singleSegmentScroll * itemsPerPage + 1
     local endIdx = math.min(startIdx + itemsPerPage - 1, #singleSegments)
     
-    local bw = math.floor((w - 6) / 2)
-    local bx1, bx2 = 2, w - bw - 1
+    local sbX = w - 3
+    local contentRight = sbX - 2
+    local colGap = 2
+    local bw = math.floor((contentRight - 1 - colGap) / 2)
+    if bw < 8 then bw = 8 end
+    local bx1, bx2 = 2, 2 + bw + colGap
     local by = 5
     for i = startIdx, endIdx do
       local seg = singleSegments[i]
@@ -1391,20 +1430,27 @@ local function showSingleSegmentSelection()
       local x = colIdx == 0 and bx1 or bx2
       local y = by + rowIdx * 4
       
-      local label = seg.lineName .. ' cogs:' .. tostring(seg.cost)
-      if #label > bw then label = label:sub(1, bw) end
+      local lineColor = nearestCCColor(seg.color)
+      local textColor = contrastTextColor(lineColor)
       local isSelected = (state.singleSegment == seg)
-      addButton(x, y, label, bw, 3, {isSelected and colors.green or colors.blue, colors.white}, function()
+      local label = seg.lineName .. ' ' .. tostring(seg.cost) .. 'c'
+      if isSelected then label = '>' .. label end
+      if #label > bw then label = label:sub(1, bw) end
+      addButton(x, y, label, bw, 3, {lineColor, textColor}, function()
         state.singleSegment = seg
       end)
     end
     
-    if singleSegmentScroll > 0 then
-      addButton(w-8, 2, 'UP', 6, 1, {colors.gray, colors.white}, function() singleSegmentScroll = singleSegmentScroll - 1 end)
-    end
-    if singleSegmentScroll < maxScroll then
-      addButton(w-8, h-5, 'DN', 6, 1, {colors.gray, colors.white}, function() singleSegmentScroll = singleSegmentScroll + 1 end)
-    end
+    drawVerticalScrollbar(
+      sbX,
+      by,
+      h - 6,
+      singleSegmentScroll * itemsPerPage,
+      maxScroll * itemsPerPage,
+      itemsPerPage,
+      function() singleSegmentScroll = math.max(0, singleSegmentScroll - 1) end,
+      function() singleSegmentScroll = math.min(maxScroll, singleSegmentScroll + 1) end
+    )
     
     addCancelButton()
     addButton(2, h-3, '<-back', 8, 3, {colors.black, colors.red}, function() state.page = 'home' end)
@@ -1801,8 +1847,16 @@ local function renderLinesSelection(title, selectedCode, backPage, nextPage, inf
   local ch = computeHeight(); local maxO = math.max(0, ch - (endY-startY+1))
   ui_scroll_offset = math.min(ui_scroll_offset, maxO)
   
-  addButton(sbX, startY-1, '^', 3, 1, {colors.black, colors.white}, function() ui_scroll_offset = math.max(0, ui_scroll_offset-4) end)
-  addButton(sbX, endY+1, 'v', 3, 1, {colors.black, colors.white}, function() ui_scroll_offset = math.min(maxO, ui_scroll_offset+4) end)
+  drawVerticalScrollbar(
+    sbX,
+    startY,
+    endY,
+    ui_scroll_offset,
+    maxO,
+    4,
+    function() ui_scroll_offset = math.max(0, ui_scroll_offset-4) end,
+    function() ui_scroll_offset = math.min(maxO, ui_scroll_offset+4) end
+  )
   
   local y = startY
   for _, l in ipairs(CFG.lines) do