Replace subprocess spawning (run9p) with native 9P connection for hot paths:
- refreshSessions() - called on every sessionsChanged event
- loadRootBackends() - called on daemon connect
- loadRootAgents() - called on daemon connect
Lib9pClient wraps the Go shared library with a Qt-friendly C++ API.
Connection persists across operations, eliminating ~2-5ms per-call
process spawn overhead.
Requires libollie9p.so from parent repo's lib9p/ package.
Levi Neely