feat: global block library tree + grouping tool — 19 files, 588 tests green

frontend/src/types/ui.types.ts

@@ -99,6 +99,8 @@ export interface LeftSidebarProps {
   onDeleteBlock?: (id: string) => void;
   onSvgImport?: (svg: string, name: string, category: string) => void;
   onSaveGroupAsBlock?: (name: string) => void;
+  onGroup?: () => void;
+  onUngroup?: () => void;
 }
 
 export interface CanvasAreaProps {
@@ -133,6 +135,7 @@ export interface CanvasAreaProps {
   selectedTemplate?: string | null;
   bgConfig?: BackgroundConfig | null;
   remoteCursors?: UserCursor[];
+  groups?: Array<{ id: string; name: string; elementIds: string[]; parentGroupId: string | null }>;
 }
 
 export interface RightSidebarProps {
@@ -171,6 +174,7 @@ export interface RightSidebarProps {
   onKISuggestionClick?: (suggestion: KISuggestion) => void;
   kiLoading?: boolean;
   onUpdateElement?: (el: CADElement) => void;
+  token?: string;
   className?: string;
   onCollapse?: () => void;
   collapsed?: boolean;