// Shared application state — single source of truth
export const state = {
    // Circuit
    gates: [],
    connections: [],
    nextId: 1,

    // Interaction
    placingGate: null,
    dragging: null,
    dragOffset: { x: 0, y: 0 },
    connecting: null,
    hoveredGate: null,
    hoveredPort: null,
    mouseX: 0,
    mouseY: 0,

    // Waveform
    waveformVisible: false,
    waveformHeight: 220,
    recording: true,
    waveData: {},       // { gateId: [{ t, value }] }
    timeStep: 0,
    waveZoom: 20,       // pixels per time step
    waveScroll: 0,
    resizingWave: false,

    // Simulation
    simRunning: false,
    simInterval: null,
    simSpeed: 500        // ms per tick
};