- Add automatic format detection (binary, ASCII hex dump, or text line) in StreamReader based on stream preambles.
- Implement fallback to 115200 baudrate when 888888 ioctl fails (critical for macOS PTYs).
- Parse binary streams (X family) with little-endian sequence/length headers and Modbus CRC-16 checks.
- Discover and prioritize virtual serial ports (from running socat instances) in enumerate_ports using lsof.
- Update FakeTransport to mock read() and readline() calls for unit test compatibility.
Move all application source under src/pygui/ and rewire imports,
build config, and QML module path to match.
- Relocate backend/, serialcomm/, and the ISC QML module into
src/pygui/; convert main.py into pygui/__main__.py with a main()
entry point (run via `python -m pygui` or the new `isc` script)
- Rewrite absolute imports: backend.* -> pygui.backend.*,
serialcomm.* -> pygui.serialcomm.* (source + tests)
- Move app icons (isc.ico/icns) into packaging/
- Update README and ISC.qmlproject to the new paths
jack