feat: 完善差旅票据行程提取与费用明细回填逻辑

增强文档智能识别的票据场景关键词和字段提取能力，优化
会话关联草稿报销单的解析路径，修复费用明细合并和票据
去重边界问题，前端改进报销创建和审批详情交互，补充单
元测试覆盖。

server/storage/expense_claims/3754b9c8-e0f0-4d88-a24c-d52c7620be2c/3d643ccb-cfb5-48c5-8037-39dbe1fa87e4/2月20_武汉-上海.pdf.meta.json

@@ -1,85 +0,0 @@
-{
-  "file_name": "2月20_武汉-上海.pdf",
-  "storage_key": "3754b9c8-e0f0-4d88-a24c-d52c7620be2c/3d643ccb-cfb5-48c5-8037-39dbe1fa87e4/2月20_武汉-上海.pdf",
-  "media_type": "application/pdf",
-  "size_bytes": 24995,
-  "uploaded_at": "2026-05-21T01:54:55.627221+00:00",
-  "previewable": true,
-  "preview_kind": "image",
-  "preview_storage_key": "3754b9c8-e0f0-4d88-a24c-d52c7620be2c/3d643ccb-cfb5-48c5-8037-39dbe1fa87e4/2月20_武汉-上海.preview.png",
-  "preview_media_type": "image/png",
-  "preview_file_name": "2月20_武汉-上海.preview.png",
-  "analysis": {
-    "severity": "medium",
-    "label": "中风险",
-    "headline": "AI提示：附件存在明显待整改项",
-    "summary": "当前附件可见部分内容，但金额、用途、日期或附件类型仍有缺失或不一致。",
-    "points": [
-      "用途字段：用户填写用途“至 2026-02-23，支撑上海电力项目部署，”与票据内容不一致，当前附件更像交通相关材料。"
-    ],
-    "suggestion": "建议根据风险点补齐清晰票据，或修正金额、日期、费用说明后再提交。"
-  },
-  "document_info": {
-    "document_type": "train_ticket",
-    "document_type_label": "火车/高铁票",
-    "scene_code": "travel",
-    "scene_label": "差旅票据",
-    "fields": [
-      {
-        "key": "amount",
-        "label": "金额",
-        "value": "354元"
-      },
-      {
-        "key": "date",
-        "label": "日期",
-        "value": "2026-05-18"
-      },
-      {
-        "key": "merchant_name",
-        "label": "商户",
-        "value": "中国铁路"
-      },
-      {
-        "key": "invoice_number",
-        "label": "票据号码",
-        "value": "26429165800002785705"
-      },
-      {
-        "key": "route",
-        "label": "行程",
-        "value": "武汉-上海"
-      }
-    ]
-  },
-  "requirement_check": {
-    "matches": true,
-    "current_expense_type": "train_ticket",
-    "current_expense_type_label": "火车票",
-    "allowed_scene_labels": [],
-    "allowed_document_type_labels": [],
-    "recognized_scene_code": "travel",
-    "recognized_scene_label": "差旅票据",
-    "recognized_document_type": "train_ticket",
-    "recognized_document_type_label": "火车/高铁票",
-    "mismatch_severity": "high",
-    "rule_code": "rule.expense.scene_submission_standard",
-    "rule_name": "报销场景提交与附件标准",
-    "message": "当前费用项目为火车票，已识别为火车/高铁票。"
-  },
-  "ocr_status": "recognized",
-  "ocr_error": "",
-  "ocr_text": "电子发票\n（铁路电子客票)\n州\n国家税务总局\n发票号码：26429165800002785705\n湖北省税务局\n开票日期:2026年05月18日\n武汉站\n上海虹桥站\nG458\nWuhan\nShanghaihongqiao\n2026年02月20日\n07:55开\n06车01B号\n二等座\n票价：￥354.00\n4201061987****1615\n曹笑竹\n电子客票号：6580061086021391007342026\n购买方名称:曹笑竹\n统一社会信用代码：\n买票请到12306发货请到95306\n中国铁路祝您旅途愉快",
-  "ocr_summary": "电子发票；（铁路电子客票)；州",
-  "ocr_avg_score": 0.9580968717734019,
-  "ocr_line_count": 24,
-  "ocr_classification_source": "rule",
-  "ocr_classification_confidence": 0.88,
-  "ocr_classification_evidence": [
-    "铁路电子客票",
-    "电子客票",
-    "铁路",
-    "二等座"
-  ],
-  "ocr_warnings": []
-}

server/storage/expense_claims/3754b9c8-e0f0-4d88-a24c-d52c7620be2c/a8d8e56b-8e0c-4feb-9371-1e3cd71ce25b/2月23_上海-武汉.pdf.meta.json

@@ -1,85 +0,0 @@
-{
-  "file_name": "2月23_上海-武汉.pdf",
-  "storage_key": "3754b9c8-e0f0-4d88-a24c-d52c7620be2c/a8d8e56b-8e0c-4feb-9371-1e3cd71ce25b/2月23_上海-武汉.pdf",
-  "media_type": "application/pdf",
-  "size_bytes": 24940,
-  "uploaded_at": "2026-05-21T01:55:11.468967+00:00",
-  "previewable": true,
-  "preview_kind": "image",
-  "preview_storage_key": "3754b9c8-e0f0-4d88-a24c-d52c7620be2c/a8d8e56b-8e0c-4feb-9371-1e3cd71ce25b/2月23_上海-武汉.preview.png",
-  "preview_media_type": "image/png",
-  "preview_file_name": "2月23_上海-武汉.preview.png",
-  "analysis": {
-    "severity": "medium",
-    "label": "中风险",
-    "headline": "AI提示：附件存在明显待整改项",
-    "summary": "当前附件可见部分内容，但金额、用途、日期或附件类型仍有缺失或不一致。",
-    "points": [
-      "用途字段：用户填写用途“至 2026-02-23，支撑上海电力项目部署，”与票据内容不一致，当前附件更像交通相关材料。"
-    ],
-    "suggestion": "建议根据风险点补齐清晰票据，或修正金额、日期、费用说明后再提交。"
-  },
-  "document_info": {
-    "document_type": "train_ticket",
-    "document_type_label": "火车/高铁票",
-    "scene_code": "travel",
-    "scene_label": "差旅票据",
-    "fields": [
-      {
-        "key": "amount",
-        "label": "金额",
-        "value": "354元"
-      },
-      {
-        "key": "date",
-        "label": "日期",
-        "value": "2026-05-18"
-      },
-      {
-        "key": "merchant_name",
-        "label": "商户",
-        "value": "中国铁路"
-      },
-      {
-        "key": "invoice_number",
-        "label": "票据号码",
-        "value": "26319166100006175398"
-      },
-      {
-        "key": "route",
-        "label": "行程",
-        "value": "上海-武汉"
-      }
-    ]
-  },
-  "requirement_check": {
-    "matches": true,
-    "current_expense_type": "train_ticket",
-    "current_expense_type_label": "火车票",
-    "allowed_scene_labels": [],
-    "allowed_document_type_labels": [],
-    "recognized_scene_code": "travel",
-    "recognized_scene_label": "差旅票据",
-    "recognized_document_type": "train_ticket",
-    "recognized_document_type_label": "火车/高铁票",
-    "mismatch_severity": "high",
-    "rule_code": "rule.expense.scene_submission_standard",
-    "rule_name": "报销场景提交与附件标准",
-    "message": "当前费用项目为火车票，已识别为火车/高铁票。"
-  },
-  "ocr_status": "recognized",
-  "ocr_error": "",
-  "ocr_text": "电子发票\n（铁路电子客票）\n州\n国家税务总局\n发票号码：26319166100006175398\n开票日期:2026年05月18日\n上海市税务局\n上海虹桥站\n武汉站\nG456\nShanghaihongqiao\nWuhan\n2026年02月23日\n13:54开\n12车08B号\n二等座\n票价：￥354.00\n4201061987****1615\n曹笑竹\n电子客票号：6610061086021394837402026\n购买方名称:曹笑竹\n统一社会信用代码：\n买票请到12306发货请到95306\n中国铁路祝您旅途愉快",
-  "ocr_summary": "电子发票；（铁路电子客票）；州",
-  "ocr_avg_score": 0.9620026834309101,
-  "ocr_line_count": 24,
-  "ocr_classification_source": "rule",
-  "ocr_classification_confidence": 0.88,
-  "ocr_classification_evidence": [
-    "铁路电子客票",
-    "电子客票",
-    "铁路",
-    "二等座"
-  ],
-  "ocr_warnings": []
-}