internal/app/state: use absolute pathnames

This is less error-prone and fits better into internal/app which already uses check.Absolute for all pathnames.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/app/state/multi_test.go

@@ -4,10 +4,11 @@ import (
 	"log"
 	"testing"
 
+	"hakurei.app/container/check"
 	"hakurei.app/internal/app/state"
 	"hakurei.app/message"
 )
 
 func TestMulti(t *testing.T) {
-	testStore(t, state.NewMulti(message.NewMsg(log.New(log.Writer(), "multi: ", 0)), t.TempDir()))
+	testStore(t, state.NewMulti(message.NewMsg(log.New(log.Writer(), "multi: ", 0)), check.MustAbs(t.TempDir())))
 }