sequenceDiagram
    participant App as App Initialization
    participant Check as checkHistory<br/>(Polling)
    participant Init as init()<br/>(Deferred)
    participant History as Spicetify<br/>Platform.History
    participant Storage as localStorage
    participant Listeners as Event Listeners

    App->>Check: Start polling for History availability
    loop Until History found (max ~30s)
        Check->>History: Check if History exists
        alt History available
            Check->>Init: Proceed to initialization
        else History unavailable
            Check->>Check: Wait & retry
        end
    end
    
    Init->>History: Patch history.push (add cinemaState)
    Init->>History: Mark as patched (_lyricsPlusPatched flag)
    Init->>Storage: Check playbar button localStorage flag
    Init->>Init: Create playbar button
    Init->>Listeners: Register button via setPlaybarButton
    Init->>History: Listen for pathname changes
    Init->>History: Listen for lyrics-plus events
    Listeners->>Listeners: Toggle button based on events