fix: cookie-auth-issues (#365)

* fix session clearing on error

* use singleton context to manage user state

* implement remember-me functionality

* fix errors

* fix more errors

backend/internal/data/repo/main_test.go

@@ -3,10 +3,8 @@ package repo
 import (
 	"context"
 	"log"
-	"math/rand"
 	"os"
 	"testing"
-	"time"
 
 	"github.com/hay-kot/homebox/backend/internal/data/ent"
 	"github.com/hay-kot/homebox/backend/pkgs/faker"
@@ -40,8 +38,6 @@ func bootstrap() {
 }
 
 func TestMain(m *testing.M) {
-	rand.Seed(int64(time.Now().Unix()))
-
 	client, err := ent.Open("sqlite3", "file:ent?mode=memory&cache=shared&_fk=1")
 	if err != nil {
 		log.Fatalf("failed opening connection to sqlite: %v", err)