增加自然语言状态摘要

src/Jiaowu.Api/Controllers/DashboardController.cs

@@ -178,20 +178,43 @@ public sealed class DashboardController(
                 .Select(x => (Guid?)x.Id)
                 .FirstOrDefaultAsync(cancellationToken);
             if (!studentId.HasValue)
-                return new DashboardGreeting("Student", $"{name}{greeting}", "绑定学籍后，将为你生成课程与成绩学习概览。", "学习节奏", []);
+                return new DashboardGreeting("Student", $"{name}{greeting}", "绑定学籍后，将为你生成课程与成绩学习概览。", "学习节奏", "关联学生档案后，可从课程安排、成绩和考试中生成学习状态摘要。", []);
 
-            var enrollments = db.CourseEnrollments.AsNoTracking().Where(x =>
-                x.StudentId == studentId.Value &&
-                x.Status == CourseEnrollmentStatus.Enrolled &&
+            var student = await db.Students.AsNoTracking()
+                .Where(x => x.Id == studentId.Value)
+                .Select(x => new { x.AdministrativeClassId })
+                .FirstAsync(cancellationToken);
+            var currentTasks = db.TeachingTasks.AsNoTracking().Where(task =>
                 currentTermId.HasValue &&
-                x.CourseSelectionOffering!.CourseSelectionRound!.AcademicTermId == currentTermId.Value);
-            var selectedCourses = await enrollments.CountAsync(cancellationToken);
-            var selectedCredits = await enrollments.SumAsync(
-                x => (decimal?)x.CourseSelectionOffering!.TeachingTask!.Course!.Credits,
-                cancellationToken) ?? 0;
+                task.AcademicTermId == currentTermId.Value &&
+                task.Status == TeachingTaskStatus.Published &&
+                (task.Classes.Any(item =>
+                     item.AdministrativeClassId == student.AdministrativeClassId) ||
+                 db.CourseEnrollments.Any(enrollment =>
+                     enrollment.StudentId == studentId.Value &&
+                     enrollment.Status == CourseEnrollmentStatus.Enrolled &&
+                     enrollment.CourseSelectionOffering!.TeachingTaskId == task.Id)));
+            var taskWorkload = await currentTasks.Select(task => new
+            {
+                task.Id,
+                task.CourseId,
+                Credits = task.Course!.Credits,
+                IsClassAssigned = task.Classes.Any(item =>
+                    item.AdministrativeClassId == student.AdministrativeClassId)
+            }).ToListAsync(cancellationToken);
+            var currentCourses = taskWorkload
+                .GroupBy(x => x.CourseId)
+                .Select(x => x.First())
+                .ToList();
+            var courseCount = currentCourses.Count;
+            var courseCredits = currentCourses.Sum(x => x.Credits);
+            var classAssignedCount = taskWorkload.Count(x => x.IsClassAssigned);
+            var selfSelectedCount = taskWorkload.Count(x => !x.IsClassAssigned);
             var publishedGrades = db.GradeRecords.AsNoTracking().Where(x =>
                 x.StudentId == studentId.Value &&
-                x.GradeSheet!.Status == GradeSheetStatus.Published);
+                x.GradeSheet!.Status == GradeSheetStatus.Published &&
+                currentTermId.HasValue &&
+                x.GradeSheet.TeachingTask!.AcademicTermId == currentTermId.Value);
             var gradeCount = await publishedGrades.CountAsync(cancellationToken);
             var average = await publishedGrades
                 .Where(x => x.ExamStatus == GradeExamStatus.Normal && x.TotalScore.HasValue)
@@ -202,12 +225,19 @@ public sealed class DashboardController(
 
             var subtitle = failed > 0
                 ? $"已发布成绩中有 {failed} 门课程需要重点关注，建议优先查看课程反馈。"
-                : selectedCourses > 0
-                    ? $"本学期已选 {selectedCourses} 门课、{selectedCredits:0.#} 学分，保持现在的学习节奏。"
-                    : "本学期暂未发现有效选课记录，可先查看选课安排。";
-            return new DashboardGreeting("Student", $"{name}{greeting}", subtitle, "学习节奏",
+                : courseCount > 0
+                    ? $"本学期已有 {courseCount} 门课程、{courseCredits:0.#} 学分进入你的学习安排。"
+                    : "本学期暂未发现为你安排或确认选课的课程，可先查看培养方案和选课安排。";
+            var narrative = courseCount == 0
+                ? "你的当前学习安排尚未形成：系统还没有找到行政班已安排课程或已确认选课。"
+                : failed > 0
+                    ? $"本学期已形成 {courseCount} 门课程安排，其中 {classAssignedCount} 个教学班来自行政班安排；已发布成绩中有 {failed} 门需要重点关注。"
+                    : gradeCount > 0
+                        ? $"本学期有 {courseCount} 门课程进入学习安排，已发布 {gradeCount} 门成绩，当前没有不及格记录。"
+                        : $"本学期有 {courseCount} 门课程进入学习安排，包含 {classAssignedCount} 个行政班教学班和 {selfSelectedCount} 个自主选课教学班，成绩发布后会在这里更新。";
+            return new DashboardGreeting("Student", $"{name}{greeting}", subtitle, "学习节奏", narrative,
             [
-                new DashboardGreetingInsight("本学期课程", $"{selectedCourses} 门", $"共 {selectedCredits:0.#} 学分", "calm"),
+                new DashboardGreetingInsight("本学期课程", $"{courseCount} 门", $"共 {courseCredits:0.#} 学分", "calm"),
                 new DashboardGreetingInsight("已发布成绩", $"{gradeCount} 门", average.HasValue ? $"平均分 {average.Value:0.0}" : "等待成绩发布", "calm"),
                 new DashboardGreetingInsight("重点关注", $"{failed} 门", failed > 0 ? "建议尽早安排复习与答疑" : "当前无不及格记录", failed > 0 ? "attention" : "positive")
             ]);
@@ -220,7 +250,7 @@ public sealed class DashboardController(
                 .Select(x => (Guid?)x.Id)
                 .FirstOrDefaultAsync(cancellationToken);
             if (!teacherId.HasValue)
-                return new DashboardGreeting("Teacher", $"{name}{greeting}", "绑定教师档案后，将为你生成本学期教学负荷概览。", "教学节奏", []);
+                return new DashboardGreeting("Teacher", $"{name}{greeting}", "绑定教师档案后，将为你生成本学期教学负荷概览。", "教学节奏", "关联教师档案后，可从教学班、授课学时和成绩进度生成今日工作摘要。", []);
 
             var tasks = db.TeachingTasks.AsNoTracking().Where(x =>
                 currentTermId.HasValue && x.AcademicTermId == currentTermId.Value &&
@@ -240,7 +270,10 @@ public sealed class DashboardController(
                 : teachingClasses > 0
                     ? $"本学期承担 {teachingClasses} 个教学班，预计授课 {estimatedHours} 学时。"
                     : "本学期暂未分配教学班，请留意教学任务安排。";
-            return new DashboardGreeting("Teacher", $"{name}{greeting}", subtitle, "教学节奏",
+            var narrative = pendingGrades > 0
+                ? $"你本学期承担 {teachingClasses} 个教学班，预计授课 {estimatedHours} 学时；有 {pendingGrades} 张成绩登记册等待提交。"
+                : $"你本学期承担 {teachingClasses} 个教学班，预计授课 {estimatedHours} 学时，目前没有待提交的成绩登记册。";
+            return new DashboardGreeting("Teacher", $"{name}{greeting}", subtitle, "教学节奏", narrative,
             [
                 new DashboardGreetingInsight("教学班", $"{teachingClasses} 个", $"预计 {estimatedHours} 学时", "calm"),
                 new DashboardGreetingInsight("待提交成绩", $"{pendingGrades} 张", pendingGrades > 0 ? "请在截止日前完成登记" : "当前无需提交", pendingGrades > 0 ? "attention" : "positive"),
@@ -258,7 +291,10 @@ public sealed class DashboardController(
             : taskCount > 0
                 ? $"本学期 {taskCount} 个教学班正在运行，当前没有积压待办。"
                 : "当前学期运行数据已就绪，可从教学任务开始推进。";
-        return new DashboardGreeting("Manager", $"{name}{greeting}", subtitleForManager, "运行态势",
+        var managerNarrative = actionable > 0
+            ? $"当前教学运行覆盖 {taskCount} 个教学班，其中 {scheduledCount} 个已进入课表；{actionable} 项待办正等待处理。"
+            : $"当前教学运行覆盖 {taskCount} 个教学班，其中 {scheduledCount} 个已进入课表，暂未发现需要你处理的积压事项。";
+        return new DashboardGreeting("Manager", $"{name}{greeting}", subtitleForManager, "运行态势", managerNarrative,
         [
             new DashboardGreetingInsight("当前待办", $"{actionable} 项", actionable > 0 ? "优先处理可操作事项" : "暂无积压", actionable > 0 ? "attention" : "positive"),
             new DashboardGreetingInsight("本学期教学班", $"{taskCount} 个", "教学运行规模", "calm"),
@@ -418,6 +454,7 @@ public sealed record DashboardGreeting(
     string Title,
     string Subtitle,
     string Label,
+    string Narrative,
     IReadOnlyList<DashboardGreetingInsight> Insights);
 
 public sealed record DashboardGreetingInsight(