Two-pass resolution in file_mention::resolve_mention_path -- try
workspace.join first, then std::env::current_dir().join, then a basename
fuzzy fallback. Extracted the shared resolver into working_set.rs so the
future Ctrl+P fuzzy picker (#97) uses the same logic.
Tests cover the workspace/CWD divergence repro that was masquerading as a
"@ doesn't work" report.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Hunter Bown
fd13dffd60