* fix(imessage): stop the outbound sanitizer deleting fenced role keys
sanitizeOutboundText strips standalone `user:`/`system:`/`assistant:`
lines (leaked turn boundaries), `#+#` separators and `assistant to=`
markers, but the three regexes had no code-fence awareness. A bare YAML
mapping key like `user:` on its own line inside a ```yaml block matched
ROLE_TURN_MARKER_RE and was silently deleted before iMessage delivery,
reparenting its children under the wrong node — still-valid YAML, wrong
meaning, and nothing signalling a line was removed.
Skip matches whose offset falls inside a markdown code region for all
three patterns, reusing findCodeRegions/isInsideCode already applied by
the sibling reflection-guard on this channel. Regions are recomputed per
pass because each strip shifts later offsets. Leaked markers in prose are
still stripped.
Refs: #116942
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* test(imessage): cover code-aware marker stripping
---------
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
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