Music library — BPM, Camelot key, energy

The Library tab is your master record of every track you play. Each row carries:
• Title + artist + remix
• BPM and Camelot key (e.g. 8A, 12B)
• Energy 1–10 (your own DJ-curated vibe rating)
• Genre, year, duration, plays counter

Why Camelot:
The Camelot wheel maps musical keys to numbers + A/B so you can pick harmonically-compatible neighbors at a glance. Two tracks blend smoothly when they're at the same Camelot number, ±1 on the same letter, or the same number on the opposite letter (A↔B = major/minor swap). The library search shows "Mixes well with X" suggestions when you type a track name.

Why energy 1–10:
A peak-time anthem might be 9; a deep opener 3. The Setlists tab flags transitions where energy drops 4+ steps so you don't accidentally clear the floor.

Adding tracks:
• Manually via the + Add track form
• Via Wally — "add Insomnia by Faithless to my library, 128 BPM, 8A, energy 9, genre house"