Serialize IPC_Client with a per-target mutex and full-frame send/recv plus
NUL-terminated payloads. Escape reply JSON vars, null-check daemon FS paths,
handle BREW_UTIL_TEST_CONNECTION, and track BREW_LAST_RET from the last reply.
Introduce SettingsStore (mutex snapshot/update), dual-path config mtime gating,
and fan IPC persistence to twin config files. Stop cold-start toolbox delay on
util_booted; fix jailbreak hijack retry to stop only when dead or maxed.
Add host tests for IPC wire helpers, toolbox timing policy, and hijack retry.
Hexwell
ece77ea433