Performance: skip load_dir in render, HashSet tagged lookup, cache to…

…p bar

Remove load_dir() from render loop (only on idle/navigate/file ops).
HashSet for O(1) tagged lookup in load_dir. Cache tagged total size
and top bar info (identify/pdfinfo). Cap dir_index at 200 entries.
Status bar clears after ESC. Write lastdir on exit. Selected+tagged
shows reverse+underline.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

v0.1.2

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

v0.1.1

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

Fix CI/release: checkout crust and glow dependencies

Path dependencies ../crust and ../glow need to be checked out
alongside pointer in GitHub Actions.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>