Mega Man X4 Recompiled — v0.1.1-coop-playtest.11

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

• Fixes the intro's post-dragon rescue scene locking when Zero/P1 is dead and
  X/P2 wins in Zero's campaign. The scene follows its surviving owner while
  preserving Player 1's campaign. Reproduced from a branch of a tester recording
  and verified through Mission Completed.
• Fixes X/P2's acquired armor artwork in Zero's campaign. Boots, helmet, body,
  both arm variants and full armor render through the private character
  textures. Permanent upgrades still belong to the single shared campaign.

The separate P2 intro-door crash report remains unconfirmed; this release does
not claim to fix every entry failure. Earlier unresolved staircase/input and
experimental Split reports retain their documented status.

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.