refactor: introduce clock to make tests reproducible

internal/service/week_service.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/wotra/wotra/internal/clock"
 	"github.com/wotra/wotra/internal/domain"
 	"github.com/wotra/wotra/internal/store"
 )
@@ -30,6 +31,7 @@ type WeekService struct {
 	}
 	rawDB *sql.DB
 	tz    *time.Location
+	clock clock.Clock
 }
 
 func NewWeekService(
@@ -41,6 +43,7 @@ func NewWeekService(
 	syncStore *store.SyncStore,
 	rawDB *sql.DB,
 	tz *time.Location,
+	clk clock.Clock,
 ) *WeekService {
 	return &WeekService{
 		closedDays:  closedDays,
@@ -51,6 +54,7 @@ func NewWeekService(
 		settings:    settings,
 		rawDB:       rawDB,
 		tz:          tz,
+		clock:       clk,
 	}
 }
 
@@ -185,7 +189,7 @@ func (s *WeekService) CloseWeek(ctx context.Context, weekKey string) (*domain.Cl
 	// Get settings effective at close time (today), not necessarily at the
 	// start of the week. This ensures settings changes made mid-week are
 	// reflected when the week is closed.
-	set, err := s.settings.Current(ctx, time.Now().In(s.tz).Format("2006-01-02"))
+	set, err := s.settings.Current(ctx, s.clock.Now().In(s.tz).Format("2006-01-02"))
 	if err != nil {
 		return nil, ErrNoSettings
 	}
@@ -196,7 +200,7 @@ func (s *WeekService) CloseWeek(ctx context.Context, weekKey string) (*domain.Cl
 	// Verify all past workdays that have entries are closed; collect worked ms.
 	// Past workdays with no entries at all are skipped (they contribute 0h).
 	// Future workdays in the week are always skipped.
-	todayKey := time.Now().In(s.tz).Format("2006-01-02")
+	todayKey := s.clock.Now().In(s.tz).Format("2006-01-02")
 	var totalWorkedMs int64
 	for _, dk := range dayKeys {
 		t, _ := time.ParseInLocation("2006-01-02", dk, s.tz)
@@ -226,7 +230,7 @@ func (s *WeekService) CloseWeek(ctx context.Context, weekKey string) (*domain.Cl
 		// No entries, no closed record → untracked day, counts as 0h.
 	}
 
-	now := time.Now().UnixMilli()
+	now := s.clock.Now().UnixMilli()
 	cw := &domain.ClosedWeek{
 		WeekKey:    weekKey,
 		ExpectedMs: expectedMs,