fix(monitor): OEM维修超时提醒消息格式优化

- 超时提醒格式：第X档已超时，达到第Y档扣XX%
- 提前1小时提醒格式：距离第X档（扣XX%）还剩1小时
- 第四档超时提示：已触发全额扣费（100%）
- 第四档还剩1小时提示：距离全额扣费（100%）还剩1小时
- 静默期积压消息：动态计算剩余时间并显示扣费比例
- 消息内容与空行分隔

src/lib/monitor/reminder-engine.ts

@@ -110,7 +110,7 @@ export class ReminderEngine {
         if (r.order_number) text += `工单号：${r.order_number}\n`
         text += `服务器IP：${r.server_ip || '未知'}\n服务器SN：${r.server_sn}\n`
         if (rackH) text += `机架位置：${rackH}\n`
-        text += `到期时间：${r.deadline_time}\n服务器尚未录入恢复时间，请及时处理！`
+        text += `到期时间：${r.deadline_time}\n\n服务器尚未录入恢复时间，请及时处理！`
         if (await pushText(text)) {
           this.db.prepare("UPDATE reminder_state SET notification_phase = 'before', notified_at = datetime('now', '+8 hours') WHERE id = ?").run(r.id)
         }
@@ -140,13 +140,17 @@ export class ReminderEngine {
         // 构建消息
         let text = ''
         if (p.message_type === 'oem_diag') {
-          text = `⏰ OEM诊断工单提醒\n\n`
+          text = `OEM诊断工单提醒\n\n`
           if (payload.order_number) text += `工单号：${payload.order_number}\n`
-          text += `服务器IP：${payload.server_ip || '未知'}\n服务器SN：${payload.server_sn}\n到期时间：${payload.deadline}\n服务器尚未录入恢复时间，请及时处理！`
+          text += `服务器IP：${payload.server_ip || '未知'}\n服务器SN：${payload.server_sn}\n到期时间：${payload.deadline}\n\n服务器尚未录入恢复时间，请及时处理！`
         } else if (p.message_type === 'oem_repair' && payload.type === 'repair_before') {
-          text = `⏰ OEM维修工单提醒\n\n`
+          // 重新计算剩余时间
+          const tierPenaltyMap: Record<string, string> = { '第一档': '10%', '第二档': '25%', '第三档': '50%', '第四档': '100%' }
+          const penalty = payload.tier_name ? tierPenaltyMap[payload.tier_name] || '' : ''
+          const tierLabel = payload.tier_name === '第四档' ? '全额扣费（100%）' : `${payload.tier_name}（${penalty}）`
+          text = `OEM维修工单超时提醒（距离${tierLabel}还剩1小时）\n\n`
           if (payload.order_number) text += `工单号：${payload.order_number}\n`
-          text += `服务器IP：${payload.server_ip || '未知'}\n服务器SN：${payload.server_sn}\n到期时间：${payload.deadline}\n服务器尚未录入恢复时间，请及时处理！`
+          text += `服务器IP：${payload.server_ip || '未知'}\n服务器SN：${payload.server_sn}\n到期时间：${payload.deadline}\n\n服务器尚未录入恢复时间，请及时处理！`
         }
         if (text && await pushText(text)) {
           this.db.prepare('DELETE FROM pending_messages WHERE id = ?').run(p.id)
@@ -169,7 +173,13 @@ export class ReminderEngine {
 
       if (timeToDeadline <= 0 && r.notification_phase !== 'overdue') {
         const rackRO = getRack ? await getRack(r.server_ip, r.server_sn) : null
-        let text = `⚠️ OEM维修工单已触发${r.tier_name}超时\n\n`
+        // 超时提醒格式：第X档已超时，达到第Y档扣XX%
+        const tierPenaltyMap: Record<string, string> = { '第一档': '10%', '第二档': '25%', '第三档': '50%', '第四档': '100%' }
+        const penalty = tierPenaltyMap[r.tier_name] || ''
+        const isFinalTier = r.tier_name === '第四档'
+        let text = isFinalTier
+          ? `OEM维修工单超时提醒（${r.tier_name}已超时，已触发全额扣费（100%））\n\n`
+          : `OEM维修工单超时提醒（${r.tier_name}已超时，达到${r.tier_name}扣${penalty}）\n\n`
         if (r.order_number) text += `工单号：${r.order_number}\n`
         text += `服务器IP：${r.server_ip || '未知'}\n服务器SN：${r.server_sn}\n`
         if (rackRO) text += `机架位置：${rackRO}\n`
@@ -188,11 +198,16 @@ export class ReminderEngine {
           continue
         }
         const rackRB = getRack ? await getRack(r.server_ip, r.server_sn) : null
-        let text = `⏰ OEM维修工单提醒（距离${r.tier_name}超时还剩1小时）\n\n`
+        // 提前1小时提醒格式：距离第X档（扣XX%）还剩1小时
+        const tierPenaltyMap: Record<string, string> = { '第一档': '10%', '第二档': '25%', '第三档': '50%', '第四档': '100%' }
+        const penalty = tierPenaltyMap[r.tier_name] || ''
+        const isFinalTier = r.tier_name === '第四档'
+        const tierLabel = isFinalTier ? '全额扣费（100%）' : `${r.tier_name}（${penalty}）`
+        let text = `OEM维修工单超时提醒（距离${tierLabel}还剩1小时）\n\n`
         if (r.order_number) text += `工单号：${r.order_number}\n`
         text += `服务器IP：${r.server_ip || '未知'}\n服务器SN：${r.server_sn}\n`
         if (rackRB) text += `机架位置：${rackRB}\n`
-        text += `${r.tier_name}到期时间：${r.deadline_time}\n服务器尚未录入恢复时间，请及时处理！`
+        text += `${r.tier_name}到期时间：${r.deadline_time}\n\n服务器尚未录入恢复时间，请及时处理！`
         if (await pushText(text)) {
           this.db.prepare("UPDATE reminder_state SET notification_phase = 'before', notified_at = datetime('now', '+8 hours') WHERE id = ?").run(r.id)
         }