Glow Text

Create a React + TypeScript component `GlowText` producing violet neon-tube lettering that breathes, with an ambient halo and a floor reflection — dark club aesthetic, fully CSS-driven.

Requirements:
- Background: `#0a0512` with a large violet radial glow behind the text.
- Text: `font-black uppercase text-7xl md:text-9xl tracking-wide`, color `#e9d5ff`.
- Neon effect via layered `textShadow`: `0 0 6px #c084fc, 0 0 18px #a855f7, 0 0 42px #7c3aed, 0 0 90px #6d28d9`. Build the string from a `glowColor` prop.
- Breathing: Framer Motion `animate={{ opacity: [1, 0.86, 1], filter: ['brightness(1)','brightness(1.25)','brightness(1)'] }}` with `duration: 3.2, repeat: Infinity, ease: 'easeInOut'`.
- Flicker on mount: a keyframe sequence `opacity: [0, 1, 0.2, 1, 0.4, 1]` over 0.9s before the loop starts (chain with a second `animate` after `onAnimationComplete` or use a keyframed times array).