[ahze]

Every daemonless service fjord installs gets DAEMONLESS_BANNER=color in its container environment, on both engines, so the Logs tab shows the full-color startup logo.

Since base-core ea30a34 the banner is mono by default: appjail logs read pipes through less, which takes the color logo for a binary file and stops on a prompt. fjord reads logs without a pager and its log pane renders 24-bit color, so it can ask for color.

• podman: the variable is passed to each daemonless service's environment (compose.PassEnv) and set to color in the stack's .env.
• AppJail: each jail built from a daemonless image names it in its oci environment, and directorEnv writes the value, like TZ.
• A value the stack sets itself stands: in its compose, its bundle, or its .env (the wizard's value wins in the director's .env). Other images are left alone.
• The comment on streamOutput said the UI renders logs in xterm.js; it is ui/src/ansi.ts.

Checked on netlab with zensical on podman and on AppJail through the new test/ui/banner (14/14): the logo in color with no gap between rows, the variable in podman inspect and in the jail's process environment, and DAEMONLESS_BANNER=plain written on the .env tab kept through Apply.