feat: 支持手动指定日志目录和调试音频目录

- 新增 app.log_dir 配置项，支持通过设置页面或命令行 (-l/--log-dir) 指定日志目录
- 调试音频目录 (audio.debug_dir) 已正确传入 StreamingAudioWriter
- 设置页面新增"通用设置"分组，包含日志目录选择
- 未设置时使用系统默认 AppDataLocation 路径

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/app/config_manager.cpp

@@ -65,6 +65,9 @@ void ConfigManager::loadDefaults() {
     {
         QMutexLocker locker(&mutex_);
         config_ = QVariantMap{
+            {"app", QVariantMap{
+                {"log_dir", ""}
+            }},
             {"stt", QVariantMap{
                 {"model_path", ""},
                 {"model_type", "sense_voice"},

src/main.cpp

@@ -15,14 +15,10 @@ int main(int argc, char* argv[])
     app.setApplicationVersion("0.1.0");
     app.setOrganizationName("Impress");
 
-    // 初始化日志文件
-    QString logDir = QStandardPaths::writableLocation(
+    // 默认日志目录（配置加载后可能被覆盖）
+    QString defaultLogDir = QStandardPaths::writableLocation(
         QStandardPaths::AppDataLocation);
-    QDir().mkpath(logDir);
-    QString logFilePath = logDir + "/app.log";
-    impress::Logger::init(logFilePath);
-
-    LOG_INFO("Main", QString("应用启动，日志文件: %1").arg(logFilePath));
+    QDir().mkpath(defaultLogDir);
 
     // 命令行参数
     QCommandLineParser parser;
@@ -32,6 +28,7 @@ int main(int argc, char* argv[])
     parser.addOptions({
         {{"c", "config"}, "指定配置文件路径", "path"},
         {{"m", "model"}, "指定模型路径", "path"},
+        {{"l", "log-dir"}, "指定日志文件目录", "path"},
     });
     parser.process(app);
 
@@ -39,8 +36,7 @@ int main(int argc, char* argv[])
     auto* configManager = app.configManager();
     QString configPath = parser.value("config");
     if (configPath.isEmpty()) {
-        // 使用默认配置目录
-        configPath = logDir + "/config.json";
+        configPath = defaultLogDir + "/config.json";
     }
 
     if (QFile::exists(configPath)) {
@@ -50,6 +46,20 @@ int main(int argc, char* argv[])
         LOG_INFO("Main", "使用默认配置");
     }
 
+    // 确定日志目录：命令行 > 配置 > 默认 AppDataLocation
+    QString effectiveLogDir = parser.value("log-dir");
+    if (effectiveLogDir.isEmpty()) {
+        effectiveLogDir = configManager->get("app.log_dir").toString();
+    }
+    if (effectiveLogDir.isEmpty()) {
+        effectiveLogDir = defaultLogDir;
+    }
+    QDir().mkpath(effectiveLogDir);
+    QString logFilePath = effectiveLogDir + "/app.log";
+    impress::Logger::init(logFilePath);
+
+    LOG_INFO("Main", QString("日志目录: %1").arg(effectiveLogDir));
+
     // 命令行覆盖模型路径
     QString modelPath = parser.value("model");
     if (!modelPath.isEmpty()) {

src/ui/settings_page.cpp

@@ -48,6 +48,23 @@ void SettingsPage::setupUI() {
     contentLayout->setContentsMargins(12, 8, 12, 8);
     contentLayout->setSpacing(12);
 
+    // 通用设置
+    auto* appGroup = new QGroupBox("通用设置", contentWidget);
+    auto* appLayout = new QFormLayout(appGroup);
+    appLayout->setSpacing(8);
+    appLayout->setContentsMargins(10, 12, 10, 12);
+
+    auto* logDirRow = new QHBoxLayout();
+    logDirEdit_ = new QLineEdit(this);
+    logDirEdit_->setPlaceholderText("日志文件保存路径（为空时使用系统默认路径）");
+    logDirBtn_ = new QPushButton("浏览...", this);
+    connect(logDirBtn_, &QPushButton::clicked, this, &SettingsPage::onBrowseLogDir);
+    logDirRow->addWidget(logDirEdit_);
+    logDirRow->addWidget(logDirBtn_);
+    appLayout->addRow("日志目录:", logDirRow);
+
+    contentLayout->addWidget(appGroup);
+
     // STT 设置
     auto* sttGroup = new QGroupBox("STT 推理设置", contentWidget);
     auto* sttLayout = new QFormLayout(sttGroup);
@@ -221,6 +238,7 @@ void SettingsPage::setupUI() {
 }
 
 void SettingsPage::loadFromConfig() {
+    logDirEdit_->setText(configManager_->get("app.log_dir").toString());
     modelPathEdit_->setText(configManager_->get("stt.model_path").toString());
     tokensPathEdit_->setText(configManager_->get("stt.tokens_path").toString());
     modelTypeCombo_->setCurrentText(configManager_->get("stt.model_type").toString());
@@ -252,6 +270,7 @@ void SettingsPage::loadFromConfig() {
 void SettingsPage::saveToConfig() {
     // 批量写入所有配置，只发射一次 configChanged 信号
     QMap<QString, QVariant> batch;
+    batch["app.log_dir"] = logDirEdit_->text();
     batch["stt.model_path"] = modelPathEdit_->text();
     batch["stt.tokens_path"] = tokensPathEdit_->text();
     batch["stt.model_type"] = modelTypeCombo_->currentText();
@@ -338,6 +357,14 @@ void SettingsPage::onBrowseAudioDebugDir() {
     }
 }
 
+void SettingsPage::onBrowseLogDir() {
+    QString path = QFileDialog::getExistingDirectory(this, "选择日志目录", "",
+        QFileDialog::ShowDirsOnly);
+    if (!path.isEmpty()) {
+        logDirEdit_->setText(path);
+    }
+}
+
 void SettingsPage::onSaveConfig() {
     saveToConfig();
     if (configManager_->save()) {

src/ui/settings_page.h

@@ -32,6 +32,7 @@ private slots:
     void onBrowseModelPath();
     void onBrowseTokensPath();
     void onBrowseAudioDebugDir();
+    void onBrowseLogDir();
     void onSaveConfig();
     void onResetConfig();
 
@@ -45,6 +46,10 @@ private:
 
     ConfigManager* configManager_;
 
+    // 通用设置
+    QLineEdit* logDirEdit_;
+    QPushButton* logDirBtn_;
+
     // STT 设置
     QLineEdit* modelPathEdit_;
     QPushButton* browseBtn_;

src/ui/stt_test_page.cpp

@@ -161,9 +161,10 @@ void STTTestPage::startAudioCapture() {
     int deviceIdx = deviceCombo_->currentIndex() - 1;
     audioSampleRate_ = configManager_->get("stt.sample_rate").toInt();
     bool debugEnabled = configManager_->get("stt.debug_save_audio").toBool();
+    QString debugDir = configManager_->get("audio.debug_dir").toString();
 
     // 启动流式录制器
-    if (!streamingWriter_->start(audioSampleRate_, debugEnabled)) {
+    if (!streamingWriter_->start(audioSampleRate_, debugEnabled, debugDir)) {
         QMessageBox::critical(this, "错误", "无法启动流式录制器");
         return;
     }