pub fn get_user_home_dir(state: &Arc<AppState>) -> Result<Value, String>Expand description
Get the user home directory used by the frontend for per-agent paths
(working dir, GH_CONFIG_DIR, etc.).
Portable returns <portable>/data; installed returns ~/.agentmux;
AGENTMUX_DATA_HOME, if set at launch, overrides both.
See docs/specs/portable-agent-working-dirs.md.