feat: 细化差旅票据费用明细分类并自动计算出差补贴

将差旅费用明细拆分为火车票、机票、住宿票、乘车等细分类
型，根据票据字段自动生成行程/事由描述，结合规则引擎自
动计算出差补贴金额，前端适配费用明细编辑和差旅票据审
核交互，补充单元测试覆盖。

web/src/utils/requestViewModel.js

@@ -5,6 +5,36 @@ const REQUEST_TYPE_META = {
     tone: 'travel',
     secondaryStatusLabel: '行程状态'
   },
+  train_ticket: {
+    label: '火车票',
+    detailVariant: 'travel',
+    tone: 'travel',
+    secondaryStatusLabel: '行程状态'
+  },
+  flight_ticket: {
+    label: '机票',
+    detailVariant: 'travel',
+    tone: 'travel',
+    secondaryStatusLabel: '行程状态'
+  },
+  hotel_ticket: {
+    label: '住宿票',
+    detailVariant: 'travel',
+    tone: 'travel',
+    secondaryStatusLabel: '票据状态'
+  },
+  ride_ticket: {
+    label: '乘车',
+    detailVariant: 'travel',
+    tone: 'travel',
+    secondaryStatusLabel: '票据状态'
+  },
+  travel_allowance: {
+    label: '出差补贴',
+    detailVariant: 'travel',
+    tone: 'travel',
+    secondaryStatusLabel: '系统计算'
+  },
   entertainment: {
     label: '业务招待费',
     detailVariant: 'general',