lctr v0.2.3

A big release: faster search, a live-updating index, rich file previews, and an interactive settings editor.

Highlights

Lightning search. Substring search now uses a trigram full-text index instead of a full table scan. On a 1.3M file index, searching dropped from several seconds to ~20-30ms.
Live index. While the search TUI is open, file creates, edits, and deletes are reflected in results within about a second, no rescan needed. Toggle with w.
File preview pane. Wide terminals get a side preview: syntax-highlighted text, inline images (kitty/iterm2/sixel, with a half-block fallback), and extracted PDF text. Previews load only after you pause scrolling, so the list stays smooth.
Match highlighting. The matched part of each filename and path is highlighted in results.
Frecency ranking. Files you open often and recently rank higher.

lctr config opens an interactive settings editor: pick a value, read what it does, save. Scriptable too: lctr config set <key> <value>.
Settings: theme, icons, preview, backend, update_check, index_paths.
7 themes: default, catppuccin, tokyonight, gruvbox, nord, ocean, mono. Cycle live with t.
Optional Nerd Font file-type icons (icons).

Compact redesigned layout: the controls are now one line, with a full ? help overlay.
Long paths in the detail bar now wrap instead of truncating.

Faster default scan backend (parallel walker).
Filenames are indexed by default for fast scans. Enable full-path substring search with lctr config set index_paths true (slower scan).
Cleaner scan summary timings (sub-millisecond stages show <0.00s).