Orbiscreen v0.28.9

Introduce per-client KWin virtual displays and isolated touch scoping to support multiple simultaneous tablets, expand KWin input device introspection beyond event63, add automatic fallback session creation on attach for full backwards compatibility with legacy clients, and bump the release matrix across all platforms.

Features

• Per-client KWin virtual outputs (#79 by sentinelt):
  • The daemon dynamically creates dedicated virtual outputs per client (Virtual-Orbi-<key>) based on POST /api/session with device identity and native resolution.
  • Multiple tablets can connect concurrently, each maintaining its own independent geometry, layout, and resolution.
  • Virtual displays automatically tear down on DELETE /api/session, UDP Bye, or after an idle timeout.
• Isolated Touch Scoping (#79 by sentinelt):
  • Touch input carries X-Orbiscreen-Session and scopes to each client's specific virtual output so simultaneous users do not interfere with each other.
  • Expanded KWin input device node introspection past event63 (into event256+) to guarantee uinput binding on modern kernels.
  • Web touch mode posts absolute Touch coordinates instead of relative mouse movement.
• Backwards Compatibility Fallback:
  • DisplayCommand::Attach automatically provisions and attaches to a default virtual session if called without a session ID and no active sessions exist, ensuring legacy Android APKs and direct stream consumers connect cleanly.

Changed

• Workspace & Packaging:
  • Bumped Cargo workspace package version to 0.28.9.
  • Incremented Android client versionCode to 102; updated versionName to "0.28.9".
  • Updated tauri.conf.json version to 0.28.9.
  • Bumped PKGBUILD pkgver to 0.28.9.
  • Added 0.28.9-1 release entry to debian/changelog and data/orbiscreen-copr.spec.
  • Synchronized documentation badges across all architecture and specification guides.

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