修复证书导入模板识别与文件重选

backend/tests/test_import_rules.py

@@ -20,6 +20,7 @@ from app.api.routes.admin_imports import (
     TEMPLATE_HEADERS,
     build_import_template_workbook,
     date_is_valid,
+    detect_template_from_workbook,
     normalize_row_data,
     parse_issue_date,
     row_errors,
@@ -50,6 +51,16 @@ def test_normalize_row_data_removes_time_from_excel_dates():
     assert row[COL_ISSUE_DATE] == "2026-07-05"
 
 
+def test_detect_template_from_workbook_uses_excel_headers(tmp_path):
+    source_path = tmp_path / "practice-camp.xlsx"
+    build_import_template_workbook("practice-camp").save(source_path)
+
+    detected = detect_template_from_workbook(source_path)
+
+    assert detected is not None
+    assert detected.code == "practice-camp"
+
+
 def test_row_errors_require_project_code_to_exist():
     row = {
         COL_NAME: "张三",