T04: resolveNextBin() skips POSIX .bin/next shim on Windows; invokes
next/dist/bin/next via process.execPath instead (ENOENT fix).
T18: shellEscape() branches on isWindows() — PowerShell uses '' doubling,
Unix uses POSIX '\'' escaping. All 4 agent plugins benefit automatically.
T06 secondary: tmux attach hint in `ao spawn` output gated behind
runtimeName === "tmux" (process runtime has no tmux session).
T06/T11: runtime-process destroy() and isAlive() fall back to
handle.data.pid when the in-memory processes Map is empty — fixes
cross-process CLI calls (ao session ls / ao session kill).
117b10aae9