Final clean build notes for v34:
- tsunami_gui_win32.c is the build target name.
- No old exe is included; rebuild with build_win_mingw.bat.
- 清水 / station_no 2076 is removed; 土佐清水 remains.
- JESIM transmit-only simulation calculation limit: 60 hours.
- Observation packets use wall-clock 1x and 5-minute send buckets.
- Arrived stations are resent every 5 minutes.
- packet_meaningful_update is packet-wide.
- rise is per-station peak-update marker: "+" or "0".
- Subsidence nodes have slip_m=0.
- M0/Mw fault area excludes height_m<0 subsidence nodes.
- M0/Mw counts only positive uplift nodes and height=0 footprint-only slip nodes.
- No empirical sqrt(8) M0 scale is applied in v34.

v39 addition:
- Advanced node tune mode supports Shift-left-drag rectangle additive multi-selection.
