Three new Firefly-family themes following the AE_Firefly design system:
- AE_Firefly_SteelBlue: metallic steel blue primary (~214°), burnished gold
secondary, cobalt navy tertiary, chrome silver surfaces
- AE_Firefly_Indigo: deep indigo primary (~266°), violet secondary, dusty
rose tertiary, velvet slate surfaces
- AE_Firefly_Rainbow: coral-red primary (~15°), emerald green secondary,
rich violet tertiary, sunrise cream surfaces (spans the visible spectrum)
All variants share consistent semantic colors (success/warning/error) with
AE_Firefly for cross-theme recognizability. All WCAG 2.1 AA compliant.
Also adds URL param support for theme switching:
- ?theme=AE_Firefly_SteelBlue&theme_mode=dark
- Params applied to ae_loc (persisted), then silently removed via replaceState
