diff --git a/components/ffmsep/presist/presist.cc b/components/ffmsep/presist/presist.cc
index 770f636..1534910 100644
--- a/components/ffmsep/presist/presist.cc
+++ b/components/ffmsep/presist/presist.cc
@@ -6,6 +6,7 @@
 
 #include "components/ffmsep/cpstream_core.hh"
 
+#include <algorithm>
 #include <chrono>
 #include <filesystem>
 #include <fstream>
@@ -19,6 +20,73 @@ namespace {
 
 using nlohmann::json;
 
+bool is_simple_array(const json& value) {
+    if (!value.is_array()) {
+        return false;
+    }
+    return std::all_of(value.begin(), value.end(), [](const json& item) {
+        return item.is_primitive();
+    });
+}
+
+void dump_compact_json(std::ostream& out,
+                       const json& value,
+                       int indent = 0,
+                       int indent_step = 2) {
+    const auto indent_str = std::string(static_cast<std::size_t>(indent), ' ');
+    const auto child_indent = indent + indent_step;
+    const auto child_indent_str = std::string(static_cast<std::size_t>(child_indent), ' ');
+
+    if (value.is_object()) {
+        out << "{\n";
+        bool first = true;
+        for (auto it = value.begin(); it != value.end(); ++it) {
+            if (!first) {
+                out << ",\n";
+            }
+            first = false;
+            out << child_indent_str << json(it.key()).dump() << ": ";
+            dump_compact_json(out, it.value(), child_indent, indent_step);
+        }
+        out << '\n' << indent_str << '}';
+        return;
+    }
+
+    if (value.is_array()) {
+        if (value.empty()) {
+            out << "[]";
+            return;
+        }
+
+        if (is_simple_array(value)) {
+            out << '[';
+            for (std::size_t idx = 0; idx < value.size(); ++idx) {
+                if (idx != 0U) {
+                    out << ", ";
+                }
+                out << value[static_cast<json::size_type>(idx)].dump();
+            }
+            out << ']';
+            return;
+        }
+
+        out << "[\n";
+        bool first = true;
+        for (const auto& item : value) {
+            if (!first) {
+                out << ",\n";
+            }
+            first = false;
+            out << child_indent_str;
+            dump_compact_json(out, item, child_indent, indent_step);
+        }
+        out << '\n' << indent_str << ']';
+        return;
+    }
+
+    out << value.dump();
+}
+
 json serialize_tactile_frame(const DecodedFrame& frame) {
     json result = {
         {"pts", frame.pts},
@@ -165,7 +233,8 @@ WriteResult JsonWritter::write_once(const std::string& path,
         return {false, "failed to open export file", path};
     }
 
-    stream << std::setw(2) << root;
+    dump_compact_json(stream, root);
+    stream << '\n';
     stream.flush();
     if (!stream.good()) {
         return {false, "failed to write export file", path};
diff --git a/components/view.cc b/components/view.cc
index e121d19..eef9cfc 100644
--- a/components/view.cc
+++ b/components/view.cc
@@ -6,13 +6,22 @@
 #include <array>
 #include <cmath>
 #include <cstdint>
+#include <exception>
+#include <future>
 #include <memory>
 #include <mutex>
+#include <thread>
 #include <QString>
 #include <QObject>
 #include <QMetaObject>
 #include <QStringList>
 #include <QtCore/Qt>
+#include <QCoreApplication>
+#include <QDateTime>
+#include <QDir>
+#include <QFileDialog>
+#include <QMessageBox>
+#include <QStandardPaths>
 #include <optional>
 #include <string>
 #include <qsize.h>
@@ -42,6 +51,7 @@
 #include <modern-qt/widget/text-fields.hh>
 #include <modern-qt/widget/text.hh>
 #include <modern-qt/widget/select.hh>
+#include "components/ffmsep/presist/presist.hh"
 #include "components/ffmsep/tactile/tacdec.hh"
 
 #define DEBUG       0
@@ -146,7 +156,7 @@ public:
         cfg.packet_queue_capacity = 128;
         cfg.frame_queue_capacity = 32;
         cfg.slave_request_command.assign(kSlaveRequestCommand.begin(), kSlaveRequestCommand.end());
-        cfg.slave_request_interval = std::chrono::milliseconds{200};
+        cfg.slave_request_interval = 3ms;
 
         reset_core();
         core_ = std::make_unique<ffmsep::CPStreamCore>();
@@ -175,14 +185,29 @@ public:
         return true;
     }
 
-    void stop() {
-        reset_core();
-        active_port_.clear();
-        if (heatmap_data_ && matrix_context_) {
-            heatmap_data_->set(make_flat_points(matrix_context_->get()));
-        }
-        connected_ = false;
-    }
+    void stop() {
+        if (!core_) {
+            active_port_.clear();
+            if (heatmap_data_ && matrix_context_) {
+                heatmap_data_->set(make_flat_points(matrix_context_->get()));
+            }
+            connected_ = false;
+            return;
+        }
+
+        core_->set_frame_callback({});
+        if (core_->is_running()) {
+            core_->stop();
+        }
+
+        core_->clear_frames();
+
+        connected_ = false;
+        active_port_.clear();
+        if (heatmap_data_ && matrix_context_) {
+            heatmap_data_->set(make_flat_points(matrix_context_->get()));
+        }
+    }
 
     [[nodiscard]] bool is_running() const noexcept {
         return core_ && core_->is_running();
@@ -200,6 +225,21 @@ public:
         return last_error_;
     }
 
+    std::future<ffmsep::persist::WriteResult> export_frames(const QString& path,
+                                                            bool clear_after_export) {
+        if (path.isEmpty()) {
+            return make_failed_future(path, "export path is empty");
+        }
+        if (!core_) {
+            return make_failed_future(path, "stream is not active");
+        }
+        if (core_->recorded_frame_count() == 0U) {
+            return make_failed_future(path, "no tactile frames recorded");
+        }
+        const auto normalized = QDir::toNativeSeparators(path);
+        return core_->export_recorded_frames(normalized.toStdString(), clear_after_export);
+    }
+
 private:
     void reset_core() {
         connected_ = false;
@@ -380,6 +420,20 @@ private:
     QString active_port_;
     QString last_error_;
     bool connected_ = false;
+
+    static std::future<ffmsep::persist::WriteResult> make_failed_future(
+        const QString& path,
+        std::string message) {
+        std::promise<ffmsep::persist::WriteResult> promise;
+        auto future = promise.get_future();
+        ffmsep::persist::WriteResult result{
+            false,
+            std::move(message),
+            path.toStdString()
+        };
+        promise.set_value(std::move(result));
+        return future;
+    }
 };
 
 struct SensorUiState {
@@ -482,7 +536,7 @@ static auto ComConfigComponent(ThemeManager& manager) {
             ibpro::ThemeManager {manager},
             ibpro::FixedSize {40, 40},
             ibpro::Color { IconButton::Color::TONAL },
-            ibpro::Font { material::kRoundSmallFont },
+            ibpro::Font { material::kRegularExtraSmallFont },
             MutableForward {
                 icon_button::pro::FontIcon {},
                 link_icon_context,
@@ -513,18 +567,15 @@ static auto ComConfigComponent(ThemeManager& manager) {
             ibpro::ThemeManager { manager },
             ibpro::FixedSize { 40, 40 },
             ibpro::Color { IconButton::Color::TONAL },
-            ibpro::Font { material::kRoundSmallFont },
+            ibpro::Font { material::kRegularExtraSmallFont },
             ibpro::FontIcon { material::icon::kRefresh },
             ibpro::Clickable {[&sensor] {
-                // 刷新串口列表
                 QStringList ports_list;
                 const auto ports = ffmsep::CPStreamCore::list_available_ports();
                 ports_list.reserve(static_cast<qsizetype>(ports.size()));
                 for (const auto& info : ports) {
                     ports_list.emplace_back(QString::fromStdString(info.port));
                 }
-
-                // 保持原选择（若仍然存在）
                 if (!sensor.selected_port.isEmpty()) {
                     const bool exists = ports_list.contains(sensor.selected_port);
                     if (!exists) {
@@ -539,15 +590,74 @@ static auto ComConfigComponent(ThemeManager& manager) {
         },
         lnpro::Item<FilledButton> {
             fbpro::ThemeManager {manager},
-            fbpro::FixedSize {40, 40},
-            fbpro::Color {FilledButton::Color::TONAL},
-            fbpro::Font {material::kRoundSmallFont},
-            fbpro::FontIcon {material::icon::kRefresh},
-            fbpro::Clickable {
-                [] {
-                    qDebug() << "export";
+            fbpro::FixedSize {40, 40},   
+            fbpro::Radius {8.0},
+            // fbpro::Color { IconButton::Color::TONAL },
+            fbpro::Font { material::kRegularExtraSmallFont },
+            fbpro::Text { "drive_file_move" },
+            fbpro::Clickable {[&sensor] {
+                auto* controller = sensor.controller.get();
+                if (!controller) {
+                    QMessageBox::warning(nullptr,
+                                          QStringLiteral("导出失败"),
+                                          QStringLiteral("当前串流尚未初始化。"));
+                    return;
                 }
-            }
+
+                const auto documents = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
+                const auto timestamp = QDateTime::currentDateTime().toString(QStringLiteral("yyyyMMdd_HHmmss"));
+                QString suggested_name = QStringLiteral("touchsensor_%1.json").arg(timestamp);
+                QString initial_path = documents.isEmpty()
+                    ? suggested_name
+                    : QDir(documents).filePath(suggested_name);
+
+                const QString chosen_path = QFileDialog::getSaveFileName(
+                    nullptr,
+                    QStringLiteral("导出触觉帧"),
+                    initial_path,
+                    QStringLiteral("JSON 文件 (*.json)"));
+                if (chosen_path.isEmpty()) {
+                    return;
+                }
+
+                auto future = controller->export_frames(chosen_path, false);
+                std::thread([future = std::move(future)]() mutable {
+                    ffmsep::persist::WriteResult result{};
+                    try {
+                        result = future.get();
+                    } catch (const std::exception& ex) {
+                        result.ok = false;
+                        result.error = ex.what();
+                    } catch (...) {
+                        result.ok = false;
+                        result.error = "unknown export failure";
+                    }
+
+                    if (auto* app = QCoreApplication::instance()) {
+                        QMetaObject::invokeMethod(app,
+                                                  [res = std::move(result)]() {
+                                                      if (res.ok) {
+                                                          QMessageBox::information(
+                                                              nullptr,
+                                                              QStringLiteral("导出成功"),
+                                                              QStringLiteral("触觉帧已导出至：\n%1")
+                                                                  .arg(QString::fromStdString(res.path)));
+                                                      } else {
+                                                          const auto error = QString::fromStdString(
+                                                              res.error.empty() ? std::string{"unknown error"} : res.error);
+                                                          const auto target = QString::fromStdString(res.path);
+                                                          const auto message = target.isEmpty()
+                                                              ? QStringLiteral("原因：%1").arg(error)
+                                                              : QStringLiteral("原因：%1\n目标：%2").arg(error, target);
+                                                          QMessageBox::warning(nullptr,
+                                                                                QStringLiteral("导出失败"),
+                                                                                message);
+                                                      }
+                                                  },
+                                                  Qt::QueuedConnection);
+                    }
+                }).detach();
+            }}
         }
     };
     return new Widget {
diff --git a/modern-qt/utility/material-icon.hh b/modern-qt/utility/material-icon.hh
index 72c0826..6cbdc06 100644
--- a/modern-qt/utility/material-icon.hh
+++ b/modern-qt/utility/material-icon.hh
@@ -96,6 +96,13 @@ namespace material {
     inline const auto kOutlinedLargeFont      = outlined::font_3;
     inline const auto kOutlinedExtraLargeFont = outlined::font_4;
 
+    constexpr auto kRegularFontName = regular::font;
+    inline const auto kRegularExtraSmallFont = regular::font_0;
+    inline const auto kRegularSmallFont      = regular::font_1;
+    inline const auto kRegularMediumFont     = regular::font_2;
+    inline const auto kRegularLargeFont      = regular::font_3;
+    inline const auto kRegularExtraLargeFont = regular::font_4;
+
     namespace icon {
 
         // Function
@@ -140,6 +147,7 @@ namespace material {
         constexpr auto kLogout      = "logout";
         constexpr auto kRoutine     = "routine";
         constexpr auto kDarkMode    = "dark_mode";
+        constexpr auto kFileExport = "file_export";
 
         // File
         constexpr auto kFolder        = "folder";