StreamLineFormatter now returns kind-tagged entries (text, tool, edit,
tool result, error, sys, result) instead of a flat string, so the
existing LogKind colours finally apply to stream-json output. Tool
argument/result limit raised from 120 to 500 chars.
LogKindForegroundConverter drives the log message foreground via a local
binding (beats the dim local value), so user messages render in the accent
color instead of vanishing into the transcript. Adds a small stop (Icon.Stop)
button next to Send in both composers (SessionTerminalView + WorkConsole) wired
to InterruptInteractiveCommand → InterruptInteractiveSessionAsync. Adds
session.composer.interrupt (en/de).
mika kuns