Typing @ in the chat input to reference a file froze the app on huge
workspaces. Two compounding causes:
1. The autocomplete hook fed fileFilterQuery straight into the React
Query key, so every keystroke fired a new directory_suggestions
request and a fresh BFS scan on the daemon. Added a 180 ms debounce
that mirrors the existing pattern in new-workspace-screen so rapid
typing coalesces into one request.
2. searchWorkspaceEntries only ignored node_modules, so dist, build,
target, out, coverage, vendor and __pycache__ each consumed the
5,000-entry scan budget before any real source file was reached.
Extended WORKSPACE_IGNORED_DIRECTORY_NAMES with those names and
added a regression test that proves a deep source file is still
reachable when those directories are full of bait entries.
Refs #599
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
