feat: the value's keys on the line below it: reveal and copy (#8)

internal/ui/app/app.go

@@ -395,7 +395,7 @@ func New(providers []provider.Provider, opts Options) Model {
 	if opts.Keys != nil {
 		m.keys = *opts.Keys
 	}
-	m.detail.RevealKey, m.detail.VersionsKey = keys.Name(m.keys.Reveal), keys.Name(m.keys.Versions)
+	m.detail.RevealKey, m.detail.VersionsKey, m.detail.CopyKey = keys.Name(m.keys.Reveal), keys.Name(m.keys.Versions), keys.Name(m.keys.Copy)
 	m.revealTimeout, m.hideOnBlur = opts.RevealTimeout, opts.HideOnBlur
 	m.expiryWarning = opts.ExpiryWarning
 	m.handlerSetup = opts.HandlerSetup