feat: add files notes and search

backend/internal/notes/service.go

@@ -0,0 +1,26 @@
+package notes
+
+import (
+	"errors"
+	"strings"
+
+	"gorm.io/gorm"
+	"senlinai-agent/backend/internal/domain"
+)
+
+type Service struct {
+	db *gorm.DB
+}
+
+func NewService(database *gorm.DB) *Service {
+	return &Service{db: database}
+}
+
+func (s *Service) CreateNote(projectID uint, userID uint, title string, markdown string) (*domain.Note, error) {
+	title = strings.TrimSpace(title)
+	if title == "" {
+		return nil, errors.New("note title is required")
+	}
+	note := &domain.Note{ProjectID: projectID, CreatedBy: userID, Title: title, Markdown: markdown}
+	return note, s.db.Create(note).Error
+}