refactor: update orchestrator service and travel form view

- services/orchestrator.py: update orchestrator service
- views/TravelReimbursementCreateView.vue: update travel form view
- views/scripts/TravelReimbursementCreateView.js: update travel form script

server/src/app/services/orchestrator.py

@@ -1257,8 +1257,9 @@ class OrchestratorService:
 
         if employee is not None:
             add_condition("employee_id", employee.id)
-            add_condition("employee_name", employee.name)
             add_condition("employee_name", employee.email)
+            if self._employee_name_is_unique(employee):
+                add_condition("employee_name", employee.name)
         else:
             add_condition("employee_id", normalized_user_id)
             add_condition("employee_name", normalized_user_id)
@@ -1268,6 +1269,19 @@ class OrchestratorService:
             return conditions, "你的报销单"
         return conditions, "当前用户的报销单"
 
+    def _employee_name_is_unique(self, employee: Employee) -> bool:
+        normalized_name = str(employee.name or "").strip()
+        if not normalized_name:
+            return False
+
+        same_name_count = int(
+            self.db.scalar(
+                select(func.count()).select_from(Employee).where(Employee.name == normalized_name)
+            )
+            or 0
+        )
+        return same_name_count == 1
+
     @staticmethod
     def _has_privileged_expense_query_access(context_json: dict[str, Any]) -> bool:
         role_codes = {