课程库 Excel 导入导出已完成：

支持下载标准导入模板。
导出严格沿用当前关键词、学院、分类、课程性质和状态筛选。
以课程编码为唯一键：存在则更新，不存在则新增。
校验学院编码、课程分类、课程性质、学分学时及考核方式。
整批原子导入，任一行错误则全部不写入，并提示具体行号。
学院管理员仍只能维护本学院的专业课和实践课，无法借 Excel 越权。
界面入口沿用现有课程库工具栏样式。

scripts/smoke-test.ps1

@@ -20,6 +20,9 @@ else {
 }
 $stdoutPath = Join-Path $env:TEMP 'jiaowu-api-smoke.out.log'
 $stderrPath = Join-Path $env:TEMP 'jiaowu-api-smoke.err.log'
+$courseExcelToken = [guid]::NewGuid().ToString('N')
+$courseTemplatePath = Join-Path $env:TEMP "jiaowu-course-template-$courseExcelToken.xlsx"
+$courseExportPath = Join-Path $env:TEMP "jiaowu-course-export-$courseExcelToken.xlsx"
 $env:ASPNETCORE_ENVIRONMENT = 'Development'
 $env:ASPNETCORE_URLS = 'http://localhost:5255'
 $startParameters = @{
@@ -78,6 +81,37 @@ try {
     $teachers = Invoke-RestMethod -Uri 'http://localhost:5255/api/personnel/teachers?page=1&pageSize=10' -Headers $headers
     $students = Invoke-RestMethod -Uri 'http://localhost:5255/api/personnel/students?page=1&pageSize=10' -Headers $headers
     $courses = Invoke-RestMethod -Uri 'http://localhost:5255/api/courses?page=1&pageSize=10' -Headers $headers
+    $courseCategories = Invoke-RestMethod `
+        -Uri 'http://localhost:5255/api/base-data/course-categories' `
+        -Headers $headers
+    if (@($courseCategories).Count -lt 10 -or
+        @($courses.items | Where-Object { $null -eq $_.courseCategoryId }).Count -gt 0) {
+        throw 'Course categories were not seeded or assigned to all courses.'
+    }
+    Invoke-WebRequest `
+        -Uri 'http://localhost:5255/api/courses/template' `
+        -Headers $headers `
+        -OutFile $courseTemplatePath |
+        Out-Null
+    Invoke-WebRequest `
+        -Uri 'http://localhost:5255/api/courses/export' `
+        -Headers $headers `
+        -OutFile $courseExportPath |
+        Out-Null
+    if ((Get-Item -LiteralPath $courseTemplatePath).Length -lt 1 -or
+        (Get-Item -LiteralPath $courseExportPath).Length -lt 1) {
+        throw 'Course Excel template or export is empty.'
+    }
+    $courseImport = Invoke-RestMethod `
+        -Method Post `
+        -Uri 'http://localhost:5255/api/courses/import' `
+        -Headers $headers `
+        -Form @{ file = Get-Item -LiteralPath $courseExportPath }
+    if ($courseImport.created -ne 0 -or
+        $courseImport.updated -ne $courses.total -or
+        $courseImport.total -ne $courses.total) {
+        throw 'Course Excel round-trip did not update the expected records.'
+    }
     $curriculumPlans = Invoke-RestMethod -Uri 'http://localhost:5255/api/curriculum-plans?page=1&pageSize=10' -Headers $headers
     if ($curriculumPlans.total -gt 0) {
         $curriculumDetail = Invoke-RestMethod `
@@ -757,6 +791,8 @@ try {
         Teachers     = $teachers.total
         Students     = $students.total
         Courses      = $courses.total
+        CourseCategories = @($courseCategories).Count
+        CourseExcelRows = $courseImport.total
         Plans        = $curriculumPlans.total
         PlanModules  = if ($null -ne $curriculumDetail) { @($curriculumDetail.modules).Count } else { 0 }
         TeachingTasks = $teachingTasks.total
@@ -790,4 +826,6 @@ finally {
     if (-not $process.HasExited) {
         Stop-Process -Id $process.Id -Force
     }
+    Remove-Item -LiteralPath $courseTemplatePath -Force -ErrorAction SilentlyContinue
+    Remove-Item -LiteralPath $courseExportPath -Force -ErrorAction SilentlyContinue
 }