feat: add EditorGridSizePicker and EditorSelectionFrame components; implement FreeCreateView for article management; introduce ArticleSelectionOptimizeService for optimizing article selections

server/internal/tenant/app/article_service.go

@@ -314,6 +314,54 @@ func (s *ArticleService) Detail(ctx context.Context, id int64) (*ArticleDetailRe
 	return &d, nil
 }
 
+type CreateArticleRequest struct {
+	Title string `json:"title"`
+}
+
+func (s *ArticleService) Create(ctx context.Context, req CreateArticleRequest) (*ArticleDetailResponse, error) {
+	actor := auth.MustActor(ctx)
+
+	title := strings.TrimSpace(req.Title)
+
+	tx, err := s.pool.Begin(ctx)
+	if err != nil {
+		return nil, response.ErrInternal(50014, "create_failed", "failed to begin article creation transaction")
+	}
+	defer tx.Rollback(ctx)
+
+	var articleID int64
+	if err := tx.QueryRow(ctx, `
+		INSERT INTO articles (tenant_id, source_type, template_id, generate_status, publish_status)
+		VALUES ($1, 'free_create', NULL, 'completed', 'unpublished')
+		RETURNING id
+	`, actor.TenantID).Scan(&articleID); err != nil {
+		return nil, response.ErrInternal(50014, "create_failed", "failed to create article")
+	}
+
+	sourceLabel := "自由创作"
+	var versionID int64
+	if err := tx.QueryRow(ctx, `
+		INSERT INTO article_versions (article_id, version_no, title, html_content, markdown_content, word_count, source_label)
+		VALUES ($1, 1, $2, NULL, '', 0, $3)
+		RETURNING id
+	`, articleID, title, sourceLabel).Scan(&versionID); err != nil {
+		return nil, response.ErrInternal(50014, "create_failed", "failed to create article version")
+	}
+
+	if _, err := tx.Exec(ctx, `
+		UPDATE articles SET current_version_id = $1, updated_at = NOW()
+		WHERE id = $2 AND tenant_id = $3
+	`, versionID, articleID, actor.TenantID); err != nil {
+		return nil, response.ErrInternal(50014, "create_failed", "failed to link article version")
+	}
+
+	if err := tx.Commit(ctx); err != nil {
+		return nil, response.ErrInternal(50014, "create_failed", "failed to commit article creation")
+	}
+
+	return s.Detail(ctx, articleID)
+}
+
 type UpdateArticleRequest struct {
 	Title           string   `json:"title"`
 	MarkdownContent string   `json:"markdown_content"`