feat: 优化差旅报销预审流程与个人工作台 UI 体系

- 完善 user_agent_application 申请差旅报销预审槽位与消息组装
- 增强预算助理报告与风险建议卡片交互
- 重构登录页视觉样式与移动端响应式适配
- 优化个人工作台、文档中心、政策中心、员工管理等页面布局
- 拆分 travelRequestDetailPreReviewModel 为 advice/submit 模型
- 补充报销草稿、风险复核、Item Sync 与模板执行器测试覆盖

server/src/app/services/user_agent_application_dates.py

@@ -43,6 +43,20 @@ def resolve_application_days_count(days_text: str) -> int:
     return _parse_chinese_number(chinese_match.group(0))
 
 
+def resolve_application_days_from_time_range(time_text: str) -> int:
+    matches = re.findall(
+        r"20\d{2}[-/.年]\d{1,2}[-/.月]\d{1,2}日?",
+        str(time_text or ""),
+    )
+    if len(matches) < 2:
+        return 0
+    start_date = _parse_application_date(matches[0])
+    end_date = _parse_application_date(matches[-1])
+    if start_date is None or end_date is None or end_date < start_date:
+        return 0
+    return (end_date - start_date).days + 1
+
+
 def _resolve_start_date(time_text: str, context_json: dict[str, Any]) -> date | None:
     if time_text:
         match = re.search(