Preset engine — time-based and manual preset evaluation

[luke-kearney]

Description

Evaluate and apply presets (time-based and manual) across server, firmware, and web UI.

Tasks

• Server: Evaluate conditions_json on each config fetch to determine active preset
• Server: Return active_preset in per-node config response
• Firmware: Apply preset overrides (dim brightness, group swaps) in AnimationEngine
• Web UI: Toggle presets manually, show active state

Files

• server/Services/ConfigExportService.cs (include active preset)
• firmare: src/engine/AnimationEngine.cpp (apply overrides)
• ui/js/components/preset-editor.js (manual toggle)

Labels

area:server, area:firmware, area:webui, type:enhancement