v0.1.0

The first release: the eJay 2 family on Windows, Linux and macOS, from a
one-click installer or one setup script, with your own disc.

Added

• Linux and macOS. The title's two DLLs are lifted to C
  (tools/lift_ejay2.py) and run on pcrecomp's runtime/win32hle; the same
  host source builds against the real DLLs on Windows and against win32hle
  elsewhere, as a 64-bit program (host/plat.h, host/posix.c,
  host/CMakeLists.txt; PORTING). Needs pcrecomp at
  7bbc0c0 or later (pcrecomp#135, #140-#143).
• Techno eJay (Rave eJay 2 in France, the same program) runs on the host,
  and Dance eJay 3 draws on it, silently (TITLES).
• Each title's own sample library. --lib reads an .INF and its archive
  (Dance eJay 2's DANCE20 and kits, HipHop20, RAVE20, dance30) as well
  as Dance eJay 1's PXD.TXT index; the .INF's group is the browser button,
  and an archive member is copied out once to a cache folder for the engine.
• One-step setup. setup.sh (Linux, macOS) and Setup.cmd (Windows) take
  a disc, an .iso or an installed program folder, pick the title by its
  engine, copy the program and library into game/<title>/, lift, build and
  leave a <Title> (recomp) launcher.
• The installer. launcher/launcher.json for sp00nznet/recomp-launcher, and
  .github/workflows/installer.yml, which builds the Windows, Linux and macOS
  installers and attaches them to a tagged release.
• --headless and --trace off Windows, and --sample N (one library sample
  alone at bar 0).
• conform.py checks the eJay 2 libraries (every .INF offset, the members
  back to back, the bar field, one category per group) and finds each disc's
  tempo. Against seven discs: 120,645 passed, 158 failed.
• Docs: PORTING, TITLES.
• Dance eJay 2 host: drives PXD32D4.DLL and PXD32CL1.DLL directly in the
  order Dancejay.exe uses, into a window of its own.

Added

• The arrangement page: chrome, sixteen lanes, sample blocks with the samples'
  own two-line names, hover and pressed states from K_640, block dragging.
• A working sample browser over DMACHINE\PXD.TXT and MAX.TXT - category
  buttons, wheel and scroll strip, selection, and double-click placement.
• The start-up system check, through the GFX_Intro* family.
• tools/vb_declares.py, which recovers the 217 VB5 lazy-resolution thunks in
  Dancejay.exe and disassembles their call sites. The start-up order, ALoad's
  record layout and ALautSet's scale all came out of it.
• tools/dll_signatures.py: argument counts by CFG walk rather than linear sweep.
• tools/conform.py: conformance harness. Parses every sample, control table,
  page list and saved arrangement on a local disc and reports a pass/fail count.
• A second title. --engine, --gfxdll and --pal point the host at a
  sibling: HipHop eJay 2 (2000) draws and plays through the same code. Its
  graphics DLL is the same 23 exports, its audio engine a strict superset of
  Dance eJay 2's 87. The host no longer assumes Dance's palette names, and skips
  the system check when a title ships no intro bitmaps, which HipHop does not.
• Host measurement flags: --onset (where the playhead is when a beat leaves the
  sound card), --tracks, --paintcheck, --file, --len, --selftest.

Fixed

• A dropped block destroyed the workspace. Moving a block called
  ACloseAll, which frees every bitmap ALoad made - the chrome and the button
  sheet - rather than the arrangement. A move now empties the tracks in place
  and places every slot again, earliest first.
• HipHop eJay 2's tempo. A bar was Dance eJay 2's 302,400 for every title;
  HipHop eJay 2 is 90 BPM, 470,400. The bar now comes from the library.
• The engine's internal addresses (track records, mixer-armed flag) were
  PXD32D4.DLL's; they are found in whichever engine is loaded.
• Category buttons, the paint check's allowed regions and the controls that
  answer the mouse come from each title's K_640 and SEITEN, not Dance eJay
  2's measurements; the drum pads' B_PAD_04, from another page, sat over the
  grid.
• host/build.bat finds Visual Studio with vswhere instead of one machine's
  paths, and links the C runtime in (/MT).
• Arrangement timing. A bar was 88,200 - 120 BPM counted in 44,100Hz samples,
  wrong in both tempo and unit. The engine counts output bytes (176,400 a second)
  and Dance eJay is a fixed 140 BPM, so a bar is 302,400. At the old value sixteen
  bars of grid were eight seconds and every block's end fell inside its own audio.
• Sample length is read from the tPxD header rather than PXD.TXT's bar field.
• Track grid geometry. The grid was eyeballed at y 16..323; G_SPUREN_SAMPLE_640
  puts it at 18..298, so the bottom lanes were drawing over the horizontal scroll
  bar. Blocks and the playhead now share one bar-to-pixel mapping, which removes a
  drift of one pixel per bar between the line and the blocks it crosses.
• Browser panel geometry read from K_640 instead of eye-measured constants,
  which had the first row of the sample list painting on the frame.
• GFX_IntroSetKey before the bitmaps, and a real 16-bit copy surface, which is
  what the intro needed - not a value fed to it.

Changed

• host32/ is host/, and the Windows build lands in build-windows/.
• The README is the front door again; the research narrative lives in docs/.
• Repository brought in line with the standing repo conventions: changelog,
  roadmap, contributing guide, CI, and a conformance harness with a baseline.

Removed

• The bring-up probes - import patching, memory snapshots, the Refresh timing
  experiments, host32/probe.c - and the unused runtime2/. What they found
  is in EJAY2; the code is in the history.

Installers: download the one for your system, run it, and point it at your eJay 2 disc, .iso or installed folder. Dance eJay 2, HipHop eJay 2 and Techno eJay play; Dance eJay 3 is recognized but not supported yet.