Environment & Layout: Browser-first, not a responsive afterthought: rigid matrix architecture with localized widget states ensuring the UI never chokes on heavy assets. Async delays are decoupled from the render loop — canvas metrics can be adjusted without layout freezes. Frontend & Memory (FlutterFlow): Canvas configurations are strictly RAM-managed utilizing core primitives (doubles for margins, strings for hex parsing) bypassing local storage. Drag-and-drop lists are isolated, preventing memory bloat or stale cache after processing massive asset queues. Core Processing (Dart): Stitching logic executes entirely client-side via compiled custom actions — no server handoffs, no database latency. Dimensional math calculates proportional scaling against the anchor image, guaranteeing zero aspect distortion during grid assembly. Compilation & Export: Final renders are encoded into pure JPEG byte streams and pushed directly via HTML blob objects. Micro-delays act as thread guards to stop main-thread locking during heavy bitwise operations — delivering the final file without a full tree rebuild.