默认暗色模式，添加值显示开关

components/ffmsep/presist/presist.cc

@@ -27,10 +27,12 @@ using nlohmann::json;
 // void dump_compact_json(...)
 // json serialize_tactile_frame(const DecodedFrame& frame) { ... }
 
-std::string payload_to_csv_row(const std::vector<std::uint8_t>& payload) {
-    // Combine every 2 bytes (little-endian) into one 16-bit value, output in decimal.
+std::string payload_to_csv_row(const std::string& timestamp,
+const std::vector<std::uint8_t>& payload) {
+    // First column: receive local time (YYYYMMDDHHMMSS). Then payload every 2 bytes -> uint16.
     std::ostringstream oss;
-    bool               first = true;
+    oss << timestamp;
+    bool first = false; // timestamp already placed
     for (std::size_t idx = 0; idx + 1U < payload.size(); idx += 2U) {
         const auto value =
         static_cast<std::uint16_t>(payload[idx]) | static_cast<std::uint16_t>(payload[idx + 1U] << 8U);
@@ -49,6 +51,28 @@ std::string payload_to_csv_row(const std::vector<std::uint8_t>& payload) {
 namespace {
 using nlohmann::json;
 
+std::string format_receive_time(const std::chrono::steady_clock::time_point& received) {
+    // Map steady_clock timestamp to system_clock using the current offset, then format as YYYYMMDDHHMMSS.
+    const auto now_sys      = std::chrono::system_clock::now();
+    const auto now_steady   = std::chrono::steady_clock::now();
+    const auto steady_delta = received - now_steady;
+    const auto sys_tp       = now_sys + steady_delta;
+    const auto sys_ms_tp    = std::chrono::time_point_cast<std::chrono::milliseconds>(sys_tp);
+    const auto ms_part      = std::chrono::duration_cast<std::chrono::milliseconds>(sys_ms_tp.time_since_epoch()) % 1000;
+    const auto sys_sec_tp   = std::chrono::time_point_cast<std::chrono::seconds>(sys_ms_tp);
+    const std::time_t tt    = std::chrono::system_clock::to_time_t(sys_sec_tp);
+    std::tm          tm{};
+#if defined(_WIN32)
+    localtime_s(&tm, &tt);
+#else
+    localtime_r(&tt, &tm);
+#endif
+    std::ostringstream oss;
+    oss << std::put_time(&tm, "%Y%m%d%H%M%S")
+        << std::setw(3) << std::setfill('0') << ms_part.count();
+    return oss.str();
+}
+
 bool is_simple_array(const json& value) {
     if (!value.is_array()) {
         return false;
@@ -261,7 +285,8 @@ std::deque<std::shared_ptr<DecodedFrame>>              frames) {
             continue;
         }
 
-        const auto row = payload_to_csv_row(payload);
+        const auto timestamp = format_receive_time(frame->received_at);
+        const auto row       = payload_to_csv_row(timestamp, payload);
         stream << row << '\n';
         wrote_any = true;
     }