Connection activity lamps: The connection group gains interactive TX/RX and control-line indicator lamps that blink to reflect live traffic and control-line state; the classic control-line UI is retired in favour of the lamps
Serial control lines: Added serial control line handling with a new Control Lines tab in the settings dialog
Modbus request builder: Added a Modbus request builder to the Tools menu
Per-field quick settings: Quick settings are now available per field across all groups, with the picker moved into the settings dialog
Line Ending combo: Replaced the send auto-feed checkbox with a Line Ending combo
Restore last connection: Automatically restores the connection that was open at last exit
Terminal caret & honest Tx metrics: The terminal mode shows a caret and reports real Tx counts
UI Improvements
TCP/UDP mode UI: Silenced the server-error popup and polished the TCP/UDP mode UI
Toolbar: Reworked the log-recording and quick-settings toolbar controls
UI alignment & polish: Unified the receive Auto FL and send Loop rows, aligned the Line Ending and Append Checksum combos, and more
Fixes & Enhancements
Settings defaults: Seeded and guarded the remaining Log/Display defaults in the settings panel; never store empty Rx/Tx time formats
.spu session loading: Parse .spu bool flags with toBool so saved true values survive reload
Internationalization: Label the format radios Text, not ASCII, in Chinese
Log directory: Create the log directory before opening the log file