System messages (slash-command output like /debug, plus the generic
system-message fallback) were rendered as plain text, so the uploaded
paste.rs URLs in a debug report were neither clickable nor easily
copyable.
Route both through LinkifiedText so URLs become real <a> links (open
externally via the desktop bridge, selectable/copyable text). Add an
opt-in explicitOnly mode that matches only explicit http(s):// / www.
URLs, used here so filename-shaped tokens in the report (agent.log,
errors.log, gateway.log) aren't mistaken for bare domains and linkified.
Bare-domain matching is preserved for all other LinkifiedText callers.
Adds regression tests covering explicitOnly (links only real URLs, keeps
.log filenames as text) and the default bare-domain behavior.
e0f6a35ac6