feat: 新增FAQ条目答案策略字段，支持'all'和'random'两种模式

client/faq.go

@@ -22,6 +22,7 @@ type FAQEntry struct {
 	SimilarQuestions  []string  `json:"similar_questions"`
 	NegativeQuestions []string  `json:"negative_questions"`
 	Answers           []string  `json:"answers"`
+	AnswerStrategy    string    `json:"answer_strategy"`
 	IndexMode         string    `json:"index_mode"`
 	UpdatedAt         time.Time `json:"updated_at"`
 	CreatedAt         time.Time `json:"created_at"`
@@ -36,6 +37,7 @@ type FAQEntryPayload struct {
 	SimilarQuestions  []string `json:"similar_questions,omitempty"`
 	NegativeQuestions []string `json:"negative_questions,omitempty"`
 	Answers           []string `json:"answers"`
+	AnswerStrategy    *string  `json:"answer_strategy,omitempty"`
 	TagID             string   `json:"tag_id,omitempty"`
 	TagName           string   `json:"tag_name,omitempty"`
 	IsEnabled         *bool    `json:"is_enabled,omitempty"`

internal/application/service/knowledge.go

@@ -3990,6 +3990,11 @@ func (s *knowledgeService) chunkToFAQEntry(chunk *types.Chunk, kb *types.Knowled
 	if meta == nil {
 		meta = &types.FAQChunkMetadata{StandardQuestion: chunk.Content}
 	}
+	// 默认使用 all 策略
+	answerStrategy := meta.AnswerStrategy
+	if answerStrategy == "" {
+		answerStrategy = types.AnswerStrategyAll
+	}
 	entry := &types.FAQEntry{
 		ID:                chunk.ID,
 		ChunkID:           chunk.ID,
@@ -4002,6 +4007,7 @@ func (s *knowledgeService) chunkToFAQEntry(chunk *types.Chunk, kb *types.Knowled
 		SimilarQuestions:  meta.SimilarQuestions,
 		NegativeQuestions: meta.NegativeQuestions,
 		Answers:           meta.Answers,
+		AnswerStrategy:    answerStrategy,
 		IndexMode:         kb.FAQConfig.IndexMode,
 		UpdatedAt:         chunk.UpdatedAt,
 		CreatedAt:         chunk.CreatedAt,
@@ -4110,11 +4116,22 @@ func (s *knowledgeService) resolveTagID(ctx context.Context, kbID string, payloa
 }
 
 func sanitizeFAQEntryPayload(payload *types.FAQEntryPayload) (*types.FAQChunkMetadata, error) {
+	// 处理 AnswerStrategy，默认为 all
+	answerStrategy := types.AnswerStrategyAll
+	if payload.AnswerStrategy != nil && *payload.AnswerStrategy != "" {
+		switch *payload.AnswerStrategy {
+		case types.AnswerStrategyAll, types.AnswerStrategyRandom:
+			answerStrategy = *payload.AnswerStrategy
+		default:
+			return nil, werrors.NewBadRequestError("answer_strategy 必须是 'all' 或 'random'")
+		}
+	}
 	meta := &types.FAQChunkMetadata{
 		StandardQuestion:  strings.TrimSpace(payload.StandardQuestion),
 		SimilarQuestions:  payload.SimilarQuestions,
 		NegativeQuestions: payload.NegativeQuestions,
 		Answers:           payload.Answers,
+		AnswerStrategy:    answerStrategy,
 		Version:           1,
 		Source:            "faq",
 	}

internal/types/faq.go

@@ -11,12 +11,13 @@ import (
 
 // FAQChunkMetadata 定义 FAQ 条目在 Chunk.Metadata 中的结构
 type FAQChunkMetadata struct {
-	StandardQuestion  string   `json:"standard_question"`
-	SimilarQuestions  []string `json:"similar_questions,omitempty"`
-	NegativeQuestions []string `json:"negative_questions,omitempty"`
-	Answers           []string `json:"answers,omitempty"`
-	Version           int      `json:"version,omitempty"`
-	Source            string   `json:"source,omitempty"`
+	StandardQuestion  string         `json:"standard_question"`
+	SimilarQuestions  []string       `json:"similar_questions,omitempty"`
+	NegativeQuestions []string       `json:"negative_questions,omitempty"`
+	Answers           []string       `json:"answers,omitempty"`
+	AnswerStrategy    AnswerStrategy `json:"answer_strategy,omitempty"`
+	Version           int            `json:"version,omitempty"`
+	Source            string         `json:"source,omitempty"`
 }
 
 // GeneratedQuestion 表示AI生成的单个问题
@@ -162,37 +163,49 @@ func CalculateFAQContentHash(meta *FAQChunkMetadata) string {
 	return hex.EncodeToString(hash[:])
 }
 
+// AnswerStrategy 定义答案返回策略
+type AnswerStrategy string
+
+const (
+	// AnswerStrategyAll 返回所有答案
+	AnswerStrategyAll AnswerStrategy = "all"
+	// AnswerStrategyRandom 随机返回一个答案
+	AnswerStrategyRandom AnswerStrategy = "random"
+)
+
 // FAQEntry 表示返回给前端的 FAQ 条目
 type FAQEntry struct {
-	ID                string       `json:"id"`
-	ChunkID           string       `json:"chunk_id"`
-	KnowledgeID       string       `json:"knowledge_id"`
-	KnowledgeBaseID   string       `json:"knowledge_base_id"`
-	TagID             string       `json:"tag_id"`
-	IsEnabled         bool         `json:"is_enabled"`
-	IsRecommended     bool         `json:"is_recommended"`
-	StandardQuestion  string       `json:"standard_question"`
-	SimilarQuestions  []string     `json:"similar_questions"`
-	NegativeQuestions []string     `json:"negative_questions"`
-	Answers           []string     `json:"answers"`
-	IndexMode         FAQIndexMode `json:"index_mode"`
-	UpdatedAt         time.Time    `json:"updated_at"`
-	CreatedAt         time.Time    `json:"created_at"`
-	Score             float64      `json:"score,omitempty"`
-	MatchType         MatchType    `json:"match_type,omitempty"`
-	ChunkType         ChunkType    `json:"chunk_type"`
+	ID                string         `json:"id"`
+	ChunkID           string         `json:"chunk_id"`
+	KnowledgeID       string         `json:"knowledge_id"`
+	KnowledgeBaseID   string         `json:"knowledge_base_id"`
+	TagID             string         `json:"tag_id"`
+	IsEnabled         bool           `json:"is_enabled"`
+	IsRecommended     bool           `json:"is_recommended"`
+	StandardQuestion  string         `json:"standard_question"`
+	SimilarQuestions  []string       `json:"similar_questions"`
+	NegativeQuestions []string       `json:"negative_questions"`
+	Answers           []string       `json:"answers"`
+	AnswerStrategy    AnswerStrategy `json:"answer_strategy"`
+	IndexMode         FAQIndexMode   `json:"index_mode"`
+	UpdatedAt         time.Time      `json:"updated_at"`
+	CreatedAt         time.Time      `json:"created_at"`
+	Score             float64        `json:"score,omitempty"`
+	MatchType         MatchType      `json:"match_type,omitempty"`
+	ChunkType         ChunkType      `json:"chunk_type"`
 }
 
 // FAQEntryPayload 用于创建/更新 FAQ 条目的 payload
 type FAQEntryPayload struct {
-	StandardQuestion  string   `json:"standard_question"    binding:"required"`
-	SimilarQuestions  []string `json:"similar_questions"`
-	NegativeQuestions []string `json:"negative_questions"`
-	Answers           []string `json:"answers"              binding:"required"`
-	TagID             string   `json:"tag_id"`
-	TagName           string   `json:"tag_name"`
-	IsEnabled         *bool    `json:"is_enabled,omitempty"`
-	IsRecommended     *bool    `json:"is_recommended,omitempty"`
+	StandardQuestion  string          `json:"standard_question"    binding:"required"`
+	SimilarQuestions  []string        `json:"similar_questions"`
+	NegativeQuestions []string        `json:"negative_questions"`
+	Answers           []string        `json:"answers"              binding:"required"`
+	AnswerStrategy    *AnswerStrategy `json:"answer_strategy,omitempty"`
+	TagID             string          `json:"tag_id"`
+	TagName           string          `json:"tag_name"`
+	IsEnabled         *bool           `json:"is_enabled,omitempty"`
+	IsRecommended     *bool           `json:"is_recommended,omitempty"`
 }
 
 const (