refactor for separation of concern for better readabiliy and maintainability

internal/app/initializer.go

@@ -16,11 +16,9 @@ type InteractiveInitializer struct{}
 func (i InteractiveInitializer) Init(path string) error {
 	_, err := os.Stat(path)
 	if err == nil {
-		// Path exists; assume already initialized.
 		return nil
 	}
 	if !os.IsNotExist(err) {
-		// Some other filesystem error; propagate it to the caller.
 		return err
 	}
 

internal/app/options.go

@@ -26,7 +26,7 @@ type AppBuilder struct {
 
 func defaultBuilder(ctx context.Context, config Config) *AppBuilder {
 	lifecycle := NewLifecycle()
-	logger := newDefaultLogger(config, lifecycle)
+	logger := defaultLogger(config, lifecycle)
 
 	return &AppBuilder{
 		ctx:         ctx,
@@ -37,7 +37,7 @@ func defaultBuilder(ctx context.Context, config Config) *AppBuilder {
 	}
 }
 
-func newDefaultLogger(config Config, lifecycle *Lifecycle) *slog.Logger {
+func defaultLogger(config Config, lifecycle *Lifecycle) *slog.Logger {
 	statsDir := filepath.Dir(config.StatisticsStoragePath)
 	if statsDir == "" {
 		statsDir = "."

internal/app/statistics.go

@@ -2,7 +2,7 @@ package app
 
 import (
 	"context"
-	"errors"
+	"fmt"
 	"log/slog"
 	"sync"
 	"time"
@@ -37,7 +37,7 @@ func (s *StatisticsService) Save(ctx context.Context) error {
 
 func (s *StatisticsService) GetStatistics() (models.Statistics, error) {
 	if s.storage.Data == nil {
-		return models.Statistics{}, errors.New("statistics data not initialized")
+		return models.Statistics{}, fmt.Errorf("statistics data not initialized")
 	}
 	return *s.storage.Data, nil
 }
@@ -49,7 +49,7 @@ func (s *StatisticsService) RecordTaskRun(ctx context.Context, run models.TaskRu
 	defer s.mu.Unlock()
 
 	if s.storage.Data == nil {
-		return errors.New("statistics data not initialized")
+		return fmt.Errorf("statistics data not initialized")
 	}
 
 	stats := s.storage.Data