`ignore`'s `max_depth(Some(6))` excludes files inside a 6-level-deep
directory (they sit at component depth 7), so @-mention completion and the
Ctrl+P picker silently missed them. Raise the default walk depth to 10
(covers conventionally nested Java/.NET/web trees) and make the Ctrl+P
picker honor the configurable `mention_walk_depth` — including `0` for an
unlimited walk — so it matches @-mention behavior and the existing
"set mention_walk_depth 0 to search deeper" guidance.
The walk stays bounded by `.gitignore` and `MAX_CANDIDATES`. Adds a
regression test covering depth-6 miss, default reach, and unlimited.
https://claude.ai/code/session_01MQrnh6wHfrEYN5BBdMarC1
Claude
478bae451a