Refactor AI skill routing and introduce reply handling services

- Moved the skill routing logic from matcher.go to a new router.go file for better organization.
- Implemented replyCommitService to handle sending AI replies and managing reply rounds.
- Added replyInterruptService to manage conversation interrupts and resume handling.
- Created replyRunLogService to log AI reply actions and their outcomes.
- Introduced helper functions for building conversation interrupts and resolving prompts.
- Added unit tests for the new services and functions to ensure correctness.
- Removed unused code and optimized imports in matcher.go.

internal/ai/runtime/reply_commit_service.go

@@ -0,0 +1,68 @@
+package runtime
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"cs-agent/internal/models"
+	"cs-agent/internal/pkg/dto"
+	"cs-agent/internal/pkg/enums"
+	"cs-agent/internal/repositories"
+	svc "cs-agent/internal/services"
+
+	"github.com/mlogclub/simple/sqls"
+)
+
+type replyCommitService struct{}
+
+func newReplyCommitService() *replyCommitService {
+	return &replyCommitService{}
+}
+
+func (s *replyCommitService) SendAIReply(conversation models.Conversation, message models.Message, aiAgent models.AIAgent,
+	replyText string, trace *aiReplyTraceData, clientPrefix string) (*models.Message, error) {
+	replyText = strings.TrimSpace(replyText)
+	if replyText == "" {
+		return nil, nil
+	}
+	commitStartedAt := time.Now()
+	replyMessage, err := svc.MessageService.SendAIMessage(
+		conversation.ID,
+		aiAgent.ID,
+		fmt.Sprintf("%s_%d", strings.TrimSpace(clientPrefix), message.ID),
+		enums.IMMessageTypeText,
+		replyText,
+		"",
+		s.buildAIPrincipal(aiAgent),
+	)
+	if trace != nil {
+		trace.CommitMs = time.Since(commitStartedAt).Milliseconds()
+		trace.ReplySent = err == nil && replyMessage != nil
+		if replyMessage != nil {
+			trace.ReplyMessageID = replyMessage.ID
+		}
+	}
+	return replyMessage, err
+}
+
+func (s *replyCommitService) IncrementAIReplyRounds(conversationID int64, nextRounds int, aiAgentName string) error {
+	return repositories.ConversationRepository.Updates(sqls.DB(), conversationID, map[string]any{
+		"ai_reply_rounds":  nextRounds,
+		"update_user_id":   0,
+		"update_user_name": strings.TrimSpace(aiAgentName),
+		"updated_at":       time.Now(),
+	})
+}
+
+func (s *replyCommitService) buildAIPrincipal(aiAgent models.AIAgent) *dto.AuthPrincipal {
+	username := "AI"
+	if strings.TrimSpace(aiAgent.Name) != "" {
+		username = aiAgent.Name
+	}
+	return &dto.AuthPrincipal{
+		UserID:   0,
+		Username: username,
+		Nickname: username,
+	}
+}