M9.1: wire sync logging into all mutation paths

- Add LogClosedDayDelete and LogClosedWeekDelete to SyncStore
- Inject syncStore into EntryService; log Start, Stop, StopByID,
  Update, CreateInterval, Delete, AutoStopStalledEntries
- Inject syncStore into DayService; log CloseDay, MarkDay, ReopenDay,
  and the recomputeWeek closed-week upsert
- Inject syncStore into SettingsService; log Upsert, UpdateSettings,
  DeleteSettings
- Add LogClosedWeek/LogClosedWeekDelete calls in WeekService.CloseWeek
  and ReopenWeek
- Update main.go and all service test helpers for new constructor signatures
- All Go tests and 19 Vitest tests pass

internal/service/settings_service.go

@@ -22,11 +22,12 @@ var (
 
 // SettingsService manages settings with effective-from history.
 type SettingsService struct {
-	store *store.SettingsStore
+	store     *store.SettingsStore
+	syncStore *store.SyncStore
 }
 
-func NewSettingsService(s *store.SettingsStore) *SettingsService {
-	return &SettingsService{store: s}
+func NewSettingsService(s *store.SettingsStore, syncStore *store.SyncStore) *SettingsService {
+	return &SettingsService{store: s, syncStore: syncStore}
 }
 
 // Current returns settings effective as of today.
@@ -92,6 +93,7 @@ func (s *SettingsService) Upsert(ctx context.Context, input UpsertSettingsInput)
 	if err := s.store.Insert(ctx, set); err != nil {
 		return nil, err
 	}
+	_ = s.syncStore.LogSettings(ctx, set)
 	return set, nil
 }
 
@@ -138,6 +140,7 @@ func (s *SettingsService) UpdateSettings(ctx context.Context, id string, input U
 	if err := s.store.Update(ctx, set); err != nil {
 		return nil, err
 	}
+	_ = s.syncStore.LogSettings(ctx, set)
 	return set, nil
 }
 
@@ -157,5 +160,9 @@ func (s *SettingsService) DeleteSettings(ctx context.Context, id string) error {
 		}
 		return err
 	}
-	return s.store.Delete(ctx, id)
+	if err := s.store.Delete(ctx, id); err != nil {
+		return err
+	}
+	_ = s.syncStore.LogSettingsDelete(ctx, id)
+	return nil
 }