feat: AI助评纳入第一步选择题——评分上下文带题干/选项/标准答案/学生作答，错题在第一评项扣分；校验容错：评项名归一化、忽略模型maxScore按计划值、总分与逐项不一致时以逐项为准

src/main/java/com/sztzjy/linkCommerce/service/impl/AiTrainingEvaluationServiceImpl.java

@@ -3,6 +3,7 @@ package com.sztzjy.linkCommerce.service.impl;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.sztzjy.linkCommerce.ai.QwenChatClient;
 import com.sztzjy.linkCommerce.config.exception.handler.ServiceException;
@@ -49,6 +50,8 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
     private static final int MAX_HELP_QUESTION_LENGTH = 500;
     private static final int MAX_STEP_CONTEXT_LENGTH = 2000;
     private static final int MAX_ASSESSMENT_RATIONALE_CHARACTERS = 200;
+    private static final int MAX_CHOICE_TITLE_LENGTH = 120;
+    private static final int MAX_CHOICE_OPTION_LENGTH = 80;
 
     private final ObjectMapper objectMapper = new ObjectMapper();
 
@@ -131,6 +134,9 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
         String answerSnapshot = answerSnapshot(context.answer);
         boolean reassessment = SUCCEEDED.equals(evaluation.getAssessmentStatus());
         if (reassessment && answerSnapshot.equals(evaluation.getAssessmentAnswerSnapshot())) {
+            log.info("AI assessment cached hit, evaluationId={}, answerId={}, snapshotLength={}",
+                    evaluation.getId(), context.answer == null ? null : context.answer.getId(),
+                    answerSnapshot.length());
             return toView(evaluation);
         }
         String taskSnapshot = taskSnapshot(context.effectiveContent);
@@ -145,7 +151,11 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
         String rawResponse = null;
         try {
             String knowledgeContext = knowledgeContext(context, user, "");
-            rawResponse = qwenChatClient.completeJson(assessmentSystemPrompt(criterionPlan), assessmentUserPrompt(taskSnapshot, answerSnapshot, knowledgeContext));
+            String choiceQuestionContext = choiceQuestionContext(context.effectiveContent, context.answer);
+            log.info("AI assessment choice question context prepared, evaluationId={}, entries={}",
+                    evaluation.getId(), choiceQuestionEntryCount(choiceQuestionContext));
+            rawResponse = qwenChatClient.completeJson(assessmentSystemPrompt(criterionPlan),
+                    assessmentUserPrompt(taskSnapshot, answerSnapshot, knowledgeContext, choiceQuestionContext));
             JsonNode assessmentReport = object(rawResponse);
             int score = validateAssessment(assessmentReport, criterionPlan);
             compactAssessmentRationales(assessmentReport);
@@ -316,6 +326,59 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
         return json(node);
     }
 
+    /**
+     * 第一步选择题的评分上下文：题干、选项文字、标准答案与学生作答逐题对照。
+     * 只用于 AI 助评——助学的提示词面向学生，带标准答案会泄题。
+     */
+    private String choiceQuestionContext(EffectiveTrainingTaskContent content, StudentTrainingAnswer answer) {
+        ArrayNode result = objectMapper.createArrayNode();
+        JsonNode questions = parseJsonArray(content.getStepOneQuestions());
+        JsonNode choiceAnswers = parseChoiceAnswers(answer == null ? null : answer.getStep1Answer());
+        for (JsonNode question : questions) {
+            ObjectNode entry = result.addObject();
+            entry.put("title", StringUtils.abbreviate(question.path("title").asText(), MAX_CHOICE_TITLE_LENGTH));
+            ArrayNode options = entry.putArray("options");
+            for (JsonNode option : question.path("options")) {
+                ObjectNode item = options.addObject();
+                item.put("key", option.path("key").asText());
+                item.put("content", StringUtils.abbreviate(option.path("content").asText(), MAX_CHOICE_OPTION_LENGTH));
+            }
+            entry.put("correctAnswer", question.path("answer").asText());
+            entry.put("studentAnswer", choiceAnswers.path(question.path("id").asText()).asText(""));
+        }
+        return json(result);
+    }
+
+    private int choiceQuestionEntryCount(String choiceQuestionContext) {
+        try {
+            JsonNode node = objectMapper.readTree(StringUtils.trimToEmpty(choiceQuestionContext));
+            return node.isArray() ? node.size() : 0;
+        } catch (JsonProcessingException | RuntimeException e) {
+            return 0;
+        }
+    }
+
+    private JsonNode parseJsonArray(String value) {
+        try {
+            String normalized = StringUtils.trimToEmpty(value);
+            if (!normalized.startsWith("[")) return objectMapper.createArrayNode();
+            JsonNode node = objectMapper.readTree(normalized);
+            return node != null && node.isArray() ? node : objectMapper.createArrayNode();
+        } catch (JsonProcessingException | RuntimeException e) {
+            return objectMapper.createArrayNode();
+        }
+    }
+
+    private JsonNode parseChoiceAnswers(String step1Answer) {
+        try {
+            if (StringUtils.isBlank(step1Answer)) return objectMapper.createObjectNode();
+            JsonNode choiceAnswers = objectMapper.readTree(step1Answer).path("choiceAnswers");
+            return choiceAnswers.isObject() ? choiceAnswers : objectMapper.createObjectNode();
+        } catch (JsonProcessingException | RuntimeException e) {
+            return objectMapper.createObjectNode();
+        }
+    }
+
     private String helpAnswerSnapshot(String question, String stepContext, StudentTrainingAnswer answer) {
         ObjectNode node = objectMapper.createObjectNode();
         node.put("studentQuestion", question);
@@ -359,19 +422,22 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
             }
             requireText(criterion, "name");
             requireText(criterion, "rationale");
-            Integer max = wholeNumber(criterion.get("maxScore"));
             Integer earned = wholeNumber(criterion.get("score"));
+            // maxScore 以评分计划为准：模型偶发把 maxScore 抄错导致合计≠100，
+            // 不再校验模型返回的 maxScore，只用计划值判定得分范围。
             if (!normalizeCriterionName(expected.name).equals(normalizeCriterionName(criterion.path("name").asText()))
-                    || max == null || earned == null || max != expected.maxScore || earned < 0 || earned > max) {
+                    || earned == null || earned < 0 || earned > expected.maxScore) {
                 throw invalidReport();
             }
-            maxTotal += max;
+            maxTotal += expected.maxScore;
             earnedTotal += earned;
         }
-        if (maxTotal != 100 || earnedTotal != score) {
-            throw invalidReport();
+        // 模型偶发把总分写错（与逐项得分之和不一致）：以逐项得分为准并回写报告，
+        // 避免仅因算术错误整份作废。
+        if (earnedTotal != score) {
+            ((ObjectNode) root).put("score", earnedTotal);
         }
-        return score;
+        return earnedTotal;
     }
 
     private List<AssessmentCriterionPlan> assessmentCriterionPlan(String steps) {
@@ -527,6 +593,8 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
                 + "Return exactly " + criterionPlan.size() + " criteria in this exact order. "
                 + "Each criterion's name must be copied verbatim from the quoted name in this required step plan, without adding any numbering or other characters; maxScore must exactly match: "
                 + criterionPlanPrompt(criterionPlan) + ". "
+                + "The user prompt may include a choiceQuestions array: grade each pick strictly against its correctAnswer; "
+                + "every wrong or unanswered pick must lose points within the first criterion's score, and that criterion's rationale must name the wrong question numbers. "
                 + "score, maxScore, and each criterion score must be JSON integer numbers (not strings). "
                 + "Write one complete concise Chinese sentence for each rationale and end it with Chinese punctuation. "
                 + "The combined text length of all criteria.rationale values must not exceed 200 Chinese characters; target no more than "
@@ -544,9 +612,12 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
         return result.append("]").toString();
     }
 
-    private String assessmentUserPrompt(String taskSnapshot, String answerSnapshot, String knowledgeContext) {
+    private String assessmentUserPrompt(String taskSnapshot, String answerSnapshot, String knowledgeContext,
+                                        String choiceQuestionContext) {
         return "Task snapshot: " + taskSnapshot + "\nStudent answer snapshot: " + answerSnapshot
                 + "\nResolved case material and this student's uploaded-file excerpts: " + knowledgeContext
+                + "\nchoiceQuestions (step-one single-choice questions): " + choiceQuestionContext
+                + " Each entry pairs a question's title and options with its correctAnswer and this student's studentAnswer; an empty studentAnswer means the question was not answered."
                 + "\nIf the answer snapshot contains a server-generated calculationCheck object, treat it as verified calculation evidence. "
                 + "When calculationCorrect is false, deduct points for the reported incorrectItemCount rather than treating the calculation as correct.";
     }

src/main/java/com/sztzjy/linkCommerce/training/knowledge/EffectiveTrainingTaskContent.java

@@ -15,10 +15,11 @@ public class EffectiveTrainingTaskContent {
     private final String steps;
     private final String materialName;
     private final String materialUrl;
+    private final String stepOneQuestions;
 
     private EffectiveTrainingTaskContent(String scope, String effectiveConfigId, String knowledge, String background,
                                          String objectives, String requirements, String steps, String materialName,
-                                         String materialUrl) {
+                                         String materialUrl, String stepOneQuestions) {
         this.scope = scope;
         this.effectiveConfigId = effectiveConfigId;
         this.knowledge = knowledge;
@@ -28,6 +29,7 @@ public class EffectiveTrainingTaskContent {
         this.steps = steps;
         this.materialName = materialName;
         this.materialUrl = materialUrl;
+        this.stepOneQuestions = stepOneQuestions;
     }
 
     public static EffectiveTrainingTaskContent resolve(TrainingTask task, TrainingTaskClassConfig classConfig) {
@@ -42,7 +44,8 @@ public class EffectiveTrainingTaskContent {
                 value(useTeacher ? classConfig.getRequirements() : null, task.getRequirements()),
                 value(useTeacher ? classConfig.getSteps() : null, task.getSteps()),
                 value(useTeacher ? classConfig.getMaterialName() : null, task.getMaterialName()),
-                value(useTeacher ? classConfig.getMaterialUrl() : null, task.getMaterialUrl()));
+                value(useTeacher ? classConfig.getMaterialUrl() : null, task.getMaterialUrl()),
+                value(useTeacher ? classConfig.getStepOneQuestions() : null, task.getStepOneQuestions()));
     }
 
     private static String value(String preferred, String fallback) {
@@ -58,4 +61,5 @@ public class EffectiveTrainingTaskContent {
     public String getSteps() { return steps; }
     public String getMaterialName() { return materialName; }
     public String getMaterialUrl() { return materialUrl; }
+    public String getStepOneQuestions() { return stepOneQuestions; }
 }