HAVEN-FSK v0.6.0-beta

Beta release for on-air testing. HAVEN MFSK-16 and PSK31 over HF.

Highlights

• Open protocol. HAVEN-FSK is now published as an independently
  implementable specification with a machine-readable LDPC matrix,
  encoder bit mapping, and golden test vectors (see spec/ and
  HAVEN-FSK_Specification.md). Reference audio verified over RF.
• Manual log capture. Select any text in the Received pane,
  right-click, and log it as Call / Name / Grid / RS / POTA / SOTA /
  State / County / FD — the likely field is offered first. Works in
  any mode and corrects a wrong auto-fill.
• POTA export. References normalize to the XX-NNNN standard on
  every path, and ADIF now emits POTA_REF/MY_POTA_REF for modern
  loggers (POLO, HAMRS).
• Interface. Flattened menu bar (Station Info, Audio, Radio, Mode,
  Export Log direct on the bar); callsigns with modifiers (WD9N/P,
  EA8/WD9N) recognized in untagged text.
• Reliability. Fixed a bug that clipped the first character of
  every received PSK31 transmission. Continuous integration now builds
  on Linux (x86-64 and ARM/Raspberry-Pi-class) and Windows on every
  change.

For testers: unzip anywhere and run HavenFSK.exe — no install.
Set your callsign under Station Info before transmitting. Feedback on
weak-signal decoding and sync behavior on busy bands is especially
welcome.

Full changelog: see CHANGELOG.md.