成绩提交时按考试一次性计算并存储单科名次、排名百分比、等级、合格状态、总分排名及整场合格状态。

新增 result_statistics、registration_result_summaries 两张统计表，现有数据库首次启动时自动回填。
SQL 查询首先通过 examId 限定范围。
科目成绩只排序一次，并使用 registration/subject 字典组织数据。
汇总接口与成绩明细接口已拆分，明细、成绩录入名单和特征分名单均改为服务端分页。
所有成绩写入口统一限制为：0—满分，且只能是整数或 .5，包括手工录入、批量录入、Excel 导入和复议改分。
前端也增加了相同的即时校验。
修复其他考试卡片显示 undefined 的问题。

src/Eis.Infrastructure/Candidate/CandidateService.Results.cs

@@ -36,7 +36,7 @@ internal sealed partial class CandidateService
         string verificationBaseUrl,
         CancellationToken cancellationToken)
     {
-        var snapshot = await snapshotLoader.LoadAsync(user.Id, cancellationToken, includeCohort: true);
+        var snapshot = await snapshotLoader.LoadAsync(user.Id, cancellationToken);
         var registrationById = snapshot.Registrations.ToDictionary(item => item.Id, StringComparer.Ordinal);
         var results = snapshot.Results
             .Where(item => item.Published && registrationById.ContainsKey(item.RegistrationId))
@@ -52,7 +52,7 @@ internal sealed partial class CandidateService
             }
 
             var exam = snapshot.Exams.First(item => item.Id == registration.ExamId);
-            var reportResults = snapshot.AllResults
+            var reportResults = snapshot.Results
                 .Where(item => item.RegistrationId == registration.Id && item.Published)
                 .Select(item => new ScoreSignatureItem(item.SubjectId, item.Score, item.PublishedAt, item.UpdatedAt));
             var code = documentCodes.ScoreReportCode(registration.Id, registration.UserId, exam.Id, reportResults);
@@ -157,8 +157,6 @@ internal sealed partial class CandidateService
     {
         var exam = snapshot.Exams.First(item => item.Id == registration.ExamId);
         var subject = exam.Subjects.FirstOrDefault(item => item.Id == result.SubjectId);
-        var rank = ResultRankInfo(snapshot, result);
-        var pass = SubjectPassEvaluation(snapshot, result, subject);
         var appealInstance = FindInstance(snapshot, "score_appeal", result.Id);
         var appeal = WorkflowView(snapshot, appealInstance);
         if (appeal is not null)
@@ -168,10 +166,10 @@ internal sealed partial class CandidateService
         }
 
         var json = ResultJson(result);
-        json["rank"] = JsonValue.Create(rank.Rank);
-        json["cohortSize"] = rank.CohortSize;
-        json["rankPercent"] = JsonValue.Create(rank.RankPercent);
-        json["grade"] = rank.Grade;
+        json["rank"] = JsonValue.Create(result.Rank);
+        json["cohortSize"] = result.CohortSize;
+        json["rankPercent"] = JsonValue.Create(result.RankPercent);
+        json["grade"] = result.Grade;
         json["examId"] = exam.Id;
         json["examName"] = exam.Name;
         json["examCode"] = exam.Code;
@@ -181,10 +179,10 @@ internal sealed partial class CandidateService
         json["fullScore"] = subject?.FullScore ?? 150;
         json["passRule"] = subject?.PassRule ?? "fixed_score";
         json["passValue"] = subject?.PassValue ?? subject?.PassScore;
-        json["passScore"] = JsonValue.Create(pass.PassScore);
-        json["cutoffRank"] = JsonValue.Create(pass.CutoffRank);
+        json["passScore"] = JsonValue.Create(result.PassScore);
+        json["cutoffRank"] = JsonValue.Create(result.CutoffRank);
         json["passText"] = SubjectPassText(subject);
-        json["qualified"] = JsonValue.Create(pass.Qualified);
+        json["qualified"] = JsonValue.Create(result.Qualified);
         json["appeal"] = appeal;
         return json;
     }
@@ -205,14 +203,14 @@ internal sealed partial class CandidateService
         }
 
         var subjects = exam.Subjects.Where(item => registration.SubjectIds.Contains(item.Id, StringComparer.Ordinal)).ToArray();
-        var published = snapshot.AllResults
+        var published = snapshot.Results
             .Where(item => item.RegistrationId == registration.Id && item.Published)
             .ToArray();
-        var resultsBySubject = published.ToDictionary(item => item.SubjectId, StringComparer.Ordinal);
-        var complete = subjects.Length > 0 && subjects.All(item => resultsBySubject.ContainsKey(item.Id));
-        var total = subjects.Sum(item => resultsBySubject.GetValueOrDefault(item.Id)?.Score ?? 0);
-        var fullScore = subjects.Sum(item => item.FullScore);
-        var scoreRatio = fullScore > 0 ? total / fullScore * 100 : 0;
+        var stored = snapshot.ResultSummaries.FirstOrDefault(item => item.RegistrationId == registration.Id);
+        var complete = stored?.Complete ?? false;
+        var total = stored?.TotalScore ?? 0;
+        var fullScore = stored?.FullScore ?? subjects.Sum(item => item.FullScore);
+        var scoreRatio = stored?.ScoreRatio ?? 0;
         var policy = exam.PassPolicy == "score_ratio" ? "rank_percent" : exam.PassPolicy;
         if (policy.Length == 0)
         {
@@ -220,32 +218,6 @@ internal sealed partial class CandidateService
         }
 
         var value = exam.PassValue;
-        bool? qualified = null;
-        int? rank = null;
-        int? cohortSize = null;
-        if (complete && policy == "fixed_score")
-        {
-            qualified = total >= value;
-        }
-        else if (complete && policy == "subject_scores")
-        {
-            qualified = subjects.All(item => SubjectPassEvaluation(snapshot, resultsBySubject[item.Id], item).Qualified != false);
-        }
-        else if (complete && policy == "rank_percent")
-        {
-            var subjectKey = string.Join('|', registration.SubjectIds.Order(StringComparer.Ordinal));
-            var totals = snapshot.AllRegistrations
-                .Where(item => item.Status == "approved" && item.ExamId == exam.Id &&
-                    string.Join('|', item.SubjectIds.Order(StringComparer.Ordinal)) == subjectKey)
-                .Select(item => CompleteTotal(snapshot, exam, item))
-                .Where(item => item.HasValue)
-                .Select(item => item!.Value)
-                .Order()
-                .ToArray();
-            cohortSize = totals.Length;
-            rank = 1 + totals.Count(item => item > total);
-            qualified = rank <= Math.Max(1, (int)Math.Ceiling(cohortSize.Value * value / 100));
-        }
 
         return new JsonObject
         {
@@ -263,63 +235,14 @@ internal sealed partial class CandidateService
             ["scoreRatio"] = Math.Round(scoreRatio, 2, MidpointRounding.AwayFromZero),
             ["passPolicy"] = policy,
             ["passValue"] = value,
-            ["qualified"] = JsonValue.Create(qualified),
-            ["rank"] = JsonValue.Create(rank),
-            ["cohortSize"] = JsonValue.Create(cohortSize)
+            ["qualified"] = JsonValue.Create(stored?.Qualified),
+            ["rank"] = JsonValue.Create(stored?.Rank),
+            ["cohortSize"] = JsonValue.Create(stored?.CohortSize),
+            ["rankPercent"] = JsonValue.Create(stored?.RankPercent),
+            ["cutoffRank"] = JsonValue.Create(stored?.CutoffRank)
         };
     }
 
-    private static double? CompleteTotal(
-        CandidateReadSnapshot snapshot,
-        CandidateExam exam,
-        CandidateRegistration registration)
-    {
-        var subjects = exam.Subjects.Where(item => registration.SubjectIds.Contains(item.Id, StringComparer.Ordinal)).ToArray();
-        var scores = snapshot.AllResults
-            .Where(item => item.RegistrationId == registration.Id && item.Published)
-            .ToDictionary(item => item.SubjectId, item => item.Score, StringComparer.Ordinal);
-        return subjects.Length > 0 && subjects.All(item => scores.ContainsKey(item.Id))
-            ? subjects.Sum(item => scores[item.Id])
-            : null;
-    }
-
-    private static ResultRank ResultRankInfo(CandidateReadSnapshot snapshot, CandidateResult result)
-    {
-        var scores = snapshot.AllResults
-            .Where(item => item.Published && item.SubjectId == result.SubjectId)
-            .Select(item => item.Score)
-            .Order()
-            .ToArray();
-        var cohortSize = scores.Length;
-        var rank = 1 + scores.Count(item => item > result.Score);
-        var rankPercent = cohortSize == 0
-            ? 0
-            : Math.Round(rank / (double)cohortSize * 100, 2, MidpointRounding.AwayFromZero);
-        return new ResultRank(rank, cohortSize, rankPercent, GradeForRank(rank, cohortSize));
-    }
-
-    private static PassEvaluation SubjectPassEvaluation(
-        CandidateReadSnapshot snapshot,
-        CandidateResult result,
-        CandidateSubject? subject)
-    {
-        var rank = ResultRankInfo(snapshot, result);
-        var rule = subject?.PassRule ?? "fixed_score";
-        if (rule == "none")
-        {
-            return new PassEvaluation(null, null, null, rank);
-        }
-
-        if (rule == "rank_percent")
-        {
-            var cutoff = Math.Max(1, (int)Math.Ceiling(rank.CohortSize * (subject?.PassValue ?? 60) / 100));
-            return new PassEvaluation(rank.Rank <= cutoff, null, cutoff, rank);
-        }
-
-        var passScore = Math.Round(subject?.PassValue ?? subject?.PassScore ?? 0, 2, MidpointRounding.AwayFromZero);
-        return new PassEvaluation(result.Score >= passScore, passScore, null, rank);
-    }
-
     private static string SubjectPassText(CandidateSubject? subject) => (subject?.PassRule ?? "fixed_score") switch
     {
         "none" => "不设单科线",
@@ -327,16 +250,6 @@ internal sealed partial class CandidateService
         _ => $"固定 {FormatNumber(Math.Round(subject?.PassValue ?? subject?.PassScore ?? 0, 2, MidpointRounding.AwayFromZero))} 分"
     };
 
-    private static string GradeForRank(int rank, int cohortSize)
-    {
-        int Cutoff(double ratio) => Math.Max(1, (int)Math.Ceiling(cohortSize * ratio));
-        if (rank <= Cutoff(0.1)) return "A+";
-        if (rank <= Cutoff(0.25)) return "A";
-        if (rank <= Cutoff(0.5)) return "B+";
-        if (rank <= Cutoff(0.7)) return "B";
-        if (rank <= Cutoff(0.9)) return "C";
-        return "D";
-    }
 
     private static string FormatNumber(double value) =>
         value.ToString("0.#############################", CultureInfo.InvariantCulture);
@@ -349,7 +262,4 @@ internal sealed partial class CandidateService
         return $"data:image/png;base64,{Convert.ToBase64String(qrCode.GetGraphic(10))}";
     }
 
-    private sealed record ResultRank(int Rank, int CohortSize, double RankPercent, string Grade);
-
-    private sealed record PassEvaluation(bool? Qualified, double? PassScore, int? CutoffRank, ResultRank Rank);
 }