Removing the Briefwechsel view retargets its one inbound link to document
search, which filters sender AND receiver — A->B only. The bidirectional
"replies" direction is intentionally dropped. ADR-030 records the
context, decision and consequences, and notes a bidirectional search
filter as the superseding future enhancement.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>