stats

type BigramLatency struct {
	Bigram    string
	LatencyMs int64
}

type CharStatus int

type Tracker struct {
	TargetText         string
	TargetRunes        []rune
	CharStates         []CharStatus
	CursorIdx          int
	StartTime          time.Time
	EndTime            time.Time
	LastKeyTime        time.Time
	LastKeyRune        rune
	IsStarted          bool
	IsFinished         bool
	TotalKeystrokes    int
	CorrectKeystrokes  int
	ErrorKeystrokes    int
	BackspaceCount     int
	WPMSamples         []float64
	DurationSec        int
	TargetWPM          float64 // Ghost Pacer Target (0 = disabled)
	GhostCursorIdx     int     // Position of Ghost Pacer
	RunBigramLatencies []BigramLatency
	MissedKeysMap      map[rune]int
}