✨ feat(settings): 支持自定义并持久化日志目录

- 将日志目录配置整合到数据目录设置，支持选择、打开、恢复默认与保存
- 持久化日志目录并保留环境变量优先级，目录调整后重启生效
- 通过跨进程锁和原子写入保护数据目录与日志目录配置
- 移除重复标题并互斥目录修改操作，补齐六语言文案
- 补充桌面接口、浏览器模拟及并发回归测试

internal/logger/logger.go

@@ -12,6 +12,8 @@ import (
 	"sync"
 	"sync/atomic"
 	"time"
+
+	"GoNavi-Wails/internal/appdata"
 )
 
 const (
@@ -147,6 +149,23 @@ func Path() string {
 	return logPath
 }
 
+func DefaultDirectory() string {
+	return defaultLogDir()
+}
+
+func ConfiguredDirectory() (string, bool) {
+	if directory := strings.TrimSpace(os.Getenv(envLogDir)); directory != "" {
+		if abs, err := filepath.Abs(directory); err == nil {
+			directory = filepath.Clean(abs)
+		}
+		return directory, true
+	}
+	if directory, err := appdata.ResolveConfiguredLogDirectory(); err == nil && directory != "" {
+		return directory, false
+	}
+	return defaultLogDir(), false
+}
+
 func Close() {
 	Init()
 	logMu.Lock()
@@ -263,14 +282,17 @@ func printf(level string, format string, args ...any) {
 }
 
 func initOutput() (string, io.Writer) {
-	dir := strings.TrimSpace(os.Getenv(envLogDir))
-	if dir == "" {
-		dir = defaultLogDir()
-	}
+	dir, _ := ConfiguredDirectory()
 
 	if path, writer, ok := openLogFile(dir); ok {
 		return path, writer
 	}
+	defaultDir := defaultLogDir()
+	if filepath.Clean(dir) != filepath.Clean(defaultDir) {
+		if path, writer, ok := openLogFile(defaultDir); ok {
+			return path, writer
+		}
+	}
 
 	fallbackDir := filepath.Join(os.TempDir(), appHiddenDir, appLogDirName)
 	if path, writer, ok := openLogFile(fallbackDir); ok {

internal/logger/logger_test.go

@@ -6,10 +6,13 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"path/filepath"
 	"strings"
 	"sync"
 	"testing"
 	"time"
+
+	"GoNavi-Wails/internal/appdata"
 )
 
 func TestMain(m *testing.M) {
@@ -34,6 +37,62 @@ func TestMain(m *testing.M) {
 	os.Exit(code)
 }
 
+func TestConfiguredDirectoryUsesPersistedSetting(t *testing.T) {
+	homeDir := t.TempDir()
+	t.Setenv("HOME", homeDir)
+	t.Setenv("USERPROFILE", homeDir)
+	t.Setenv(envLogDir, "")
+
+	customDirectory := filepath.Join(t.TempDir(), "custom-logs")
+	if _, err := appdata.SetConfiguredLogDirectory(customDirectory); err != nil {
+		t.Fatalf("SetConfiguredLogDirectory returned error: %v", err)
+	}
+	directory, managedByEnvironment := ConfiguredDirectory()
+	if managedByEnvironment {
+		t.Fatal("persisted log directory should not be marked as environment-managed")
+	}
+	if directory != customDirectory {
+		t.Fatalf("configured directory = %q, want %q", directory, customDirectory)
+	}
+}
+
+func TestConfiguredDirectoryPrefersEnvironmentOverride(t *testing.T) {
+	homeDir := t.TempDir()
+	t.Setenv("HOME", homeDir)
+	t.Setenv("USERPROFILE", homeDir)
+
+	persistedDirectory := filepath.Join(t.TempDir(), "persisted-logs")
+	if _, err := appdata.SetConfiguredLogDirectory(persistedDirectory); err != nil {
+		t.Fatalf("SetConfiguredLogDirectory returned error: %v", err)
+	}
+	environmentDirectory := filepath.Join(t.TempDir(), "environment-logs")
+	t.Setenv(envLogDir, environmentDirectory)
+
+	directory, managedByEnvironment := ConfiguredDirectory()
+	if !managedByEnvironment {
+		t.Fatal("environment log directory should be marked as environment-managed")
+	}
+	if directory != environmentDirectory {
+		t.Fatalf("configured directory = %q, want environment override %q", directory, environmentDirectory)
+	}
+}
+
+func TestConfiguredDirectoryFallsBackToDefault(t *testing.T) {
+	homeDir := t.TempDir()
+	t.Setenv("HOME", homeDir)
+	t.Setenv("USERPROFILE", homeDir)
+	t.Setenv(envLogDir, "")
+
+	directory, managedByEnvironment := ConfiguredDirectory()
+	if managedByEnvironment {
+		t.Fatal("default log directory should not be marked as environment-managed")
+	}
+	want := filepath.Join(homeDir, appHiddenDir, appLogDirName)
+	if directory != want {
+		t.Fatalf("configured directory = %q, want default %q", directory, want)
+	}
+}
+
 type slowSyncSink struct {
 	mu          sync.Mutex
 	contents    bytes.Buffer