New preset system for config arrays: save/load all samplers, schedulers, steps, CFG, models, LoRAs, VAEs, prompts, and all other settings as reusable presets. Stored in USCG-config-section-presets.json. Preset dropdown with Load/Save/Delete in the Config Arrays header bar. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>