feat: 集成语音输入服务到主窗口和设置页面

主窗口新增 VoiceInputService 生命周期管理，支持通过配置页面
的开关动态启停 CapsLock 语音输入功能，窗口关闭时自动清理。

设置页面新增两个复选框：
- 调试录音：保存每次识别的原始音频到临时文件夹
- 快捷语音：启用 CapsLock 长按语音输入

转写页面和 STT 测试页面同步配置中的调试音频开关到引擎。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/ui/file_transcribe_page.cpp

@@ -174,6 +174,10 @@ void FileTranscribePage::onStartTranscribe() {
                 return;
             }
 
+            // 从配置同步调试开关到引擎
+            sttEngine_->setDebugSaveAudio(
+                configManager_->get("stt.debug_save_audio").toBool());
+
             isTranscribing_ = true;
             currentTaskIndex_ = 0;
             progressBar_->setVisible(true);

src/ui/main_window.cpp

@@ -2,6 +2,7 @@
 #include "stt_test_page.h"
 #include "file_transcribe_page.h"
 #include "settings_page.h"
+#include "core/voice_input_service.h"
 #include "app/config_manager.h"
 #include "utils/logger.h"
 
@@ -26,6 +27,28 @@ MainWindow::MainWindow(ConfigManager* configManager, QWidget* parent)
     setupMenuBar();
     loadStyleSheet();
 
+    // 初始化语音输入服务
+    voiceInputService_ = new VoiceInputService(configManager_, this);
+    connect(voiceInputService_, &VoiceInputService::statusChanged,
+            this, [this](const QString& status) {
+                LOG_DEBUG(kTag, QString("语音输入状态: %1").arg(status));
+            });
+    connect(voiceInputService_, &VoiceInputService::error,
+            this, [this](const QString& err) {
+                LOG_ERROR(kTag, err);
+            });
+    connect(voiceInputService_, &VoiceInputService::recognitionResult,
+            this, [this](const QString& text) {
+                LOG_INFO(kTag, QString("语音识别结果: %1").arg(text));
+            });
+
+    // 监听配置变化，动态启停语音输入服务
+    connect(configManager_, &ConfigManager::configChanged,
+            this, &MainWindow::onVoiceInputConfigChanged);
+
+    // 启动时检查配置
+    onVoiceInputConfigChanged();
+
     LOG_INFO(kTag, "主窗口已创建");
 }
 
@@ -79,8 +102,24 @@ void MainWindow::loadStyleSheet() {
 }
 
 void MainWindow::closeEvent(QCloseEvent* event) {
+    if (voiceInputService_) {
+        voiceInputService_->stop();
+    }
     LOG_INFO(kTag, "主窗口关闭");
     QMainWindow::closeEvent(event);
 }
 
+void MainWindow::onVoiceInputConfigChanged() {
+    if (!voiceInputService_) return;
+
+    bool enabled = configManager_->get("stt.capslock_voice_enabled").toBool();
+    if (enabled && !voiceInputService_->isRunning()) {
+        voiceInputService_->start();
+        LOG_INFO(kTag, "CapsLock 语音输入已启用");
+    } else if (!enabled && voiceInputService_->isRunning()) {
+        voiceInputService_->stop();
+        LOG_INFO(kTag, "CapsLock 语音输入已关闭");
+    }
+}
+
 } // namespace impress

src/ui/main_window.h

@@ -10,6 +10,7 @@ class ConfigManager;
 class STTTestPage;
 class FileTranscribePage;
 class SettingsPage;
+class VoiceInputService;
 
 /**
  * @brief 主窗口
@@ -29,8 +30,10 @@ private:
     void setupUI();
     void setupMenuBar();
     void loadStyleSheet();
+    void onVoiceInputConfigChanged();
 
     ConfigManager* configManager_;
+    VoiceInputService* voiceInputService_;
     STTTestPage* sttPage_;
     FileTranscribePage* transcribePage_;
     SettingsPage* settingsPage_;

src/ui/settings_page.cpp

@@ -83,6 +83,14 @@ void SettingsPage::setupUI() {
     streamingCheck_->setChecked(true);
     sttLayout->addRow("流式识别:", streamingCheck_);
 
+    debugSaveAudioCheck_ = new QCheckBox("保存调试音频到 /tmp/impress_audio_debug/", this);
+    debugSaveAudioCheck_->setToolTip("开启后，每次识别会将原始音频保存为 WAV 文件，用于调试音频质量问题");
+    sttLayout->addRow("调试录音:", debugSaveAudioCheck_);
+
+    capslockVoiceCheck_ = new QCheckBox("启用 CapsLock 长按语音输入", this);
+    capslockVoiceCheck_->setToolTip("长按 CapsLock 键 1 秒后触发录音，松开后自动转写并输入到光标位置");
+    sttLayout->addRow("快捷语音:", capslockVoiceCheck_);
+
     beamSizeSpin_ = new QSpinBox(this);
     beamSizeSpin_->setRange(1, 20);
     beamSizeSpin_->setValue(5);
@@ -174,6 +182,8 @@ void SettingsPage::loadFromConfig() {
     sampleRateSpin_->setValue(configManager_->get("stt.sample_rate").toInt());
     languageCombo_->setCurrentText(configManager_->get("stt.language").toString());
     streamingCheck_->setChecked(configManager_->get("stt.streaming").toBool());
+    debugSaveAudioCheck_->setChecked(configManager_->get("stt.debug_save_audio").toBool());
+    capslockVoiceCheck_->setChecked(configManager_->get("stt.capslock_voice_enabled").toBool());
     beamSizeSpin_->setValue(configManager_->get("stt.beam_size").toInt());
     temperatureSpin_->setValue(configManager_->get("stt.temperature").toDouble());
 
@@ -196,6 +206,8 @@ void SettingsPage::saveToConfig() {
     configManager_->set("stt.sample_rate", sampleRateSpin_->value());
     configManager_->set("stt.language", languageCombo_->currentText());
     configManager_->set("stt.streaming", streamingCheck_->isChecked());
+    configManager_->set("stt.debug_save_audio", debugSaveAudioCheck_->isChecked());
+    configManager_->set("stt.capslock_voice_enabled", capslockVoiceCheck_->isChecked());
     configManager_->set("stt.beam_size", beamSizeSpin_->value());
     configManager_->set("stt.temperature", temperatureSpin_->value());
 

src/ui/settings_page.h

@@ -51,6 +51,8 @@ private:
     QSpinBox* sampleRateSpin_;
     QComboBox* languageCombo_;
     QCheckBox* streamingCheck_;
+    QCheckBox* debugSaveAudioCheck_;
+    QCheckBox* capslockVoiceCheck_;
     QSpinBox* beamSizeSpin_;
     QDoubleSpinBox* temperatureSpin_;
 

src/ui/stt_test_page.cpp

@@ -135,6 +135,10 @@ void STTTestPage::onToggleRecording() {
             return;
         }
 
+        // 从配置同步调试开关到引擎
+        sttEngine_->setDebugSaveAudio(
+            configManager_->get("stt.debug_save_audio").toBool());
+
         // 异步加载模型
         if (!sttEngine_->isLoaded() ||
             currentModelPath_ != modelPath) {