Mega Man X4 Recompiled — v0.1.1-coop-playtest.12

Windows ZIP and Linux x86_64 AppImage. Both peers must use this release.
Unified cameras and Stacked lifebars remain defaults; Split remains experimental.

• Fixes Zero getting stuck in an animation loop while gripping X's Lightning
  Web. Zero can slide and wall-jump from either side, with either player order.
• Fixes Zero staying suspended or sliding across the top of Lightning Web.
  Vertical contact now collapses the web through its original behavior, as
  it does for X. Zero's double-jump contact is also preserved.

Both reported problems were reproduced on Playtest 11. The fixed build passes
eight native gameplay cases covering both player orders, with the supplied
recording also verified. Earlier unresolved reports retain their documented
status; this release does not claim to fix every intro-door or staircase issue.

For bug reports, quit normally and zip the complete saves/diagnostics folder
beside the executable or AppImage. Keep Playtest Diagnostics enabled and include
video when possible. Startup logging fixes from Playtest 9 are included.
See the numbered checklist.