teknium1 3fb8938cd3 fix: search_files now reports error for non-existent paths instead of silent empty results ...

Previously, search_files would silently return 0 results when the
search path didn't exist (e.g., /root/.hermes/... when HOME is
/home/user). The path was passed to rg/grep/find which would fail
silently, and the empty stdout was parsed as 'no matches found'.

Changes:
- Add path existence check at the top of search() using test -e.
  Returns SearchResult with a clear error message when path doesn't exist.
- Add exit code 2 checks in _search_with_rg() and _search_with_grep()
  as secondary safety net for other error types (bad regex, permissions).
- Add 4 new tests covering: nonexistent path (content mode), nonexistent
  path (files mode), existing path proceeds normally, rg error exit code.

Tests: 37 → 41 in test_file_operations.py, full suite 2330 passed.

2026-03-08 16:47:20 -07:00

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