splitLeaf always halved just the target pane, so repeated splits left
one pane at 50% and the rest squeezed into shrinking fractions instead
of equal columns.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
The browser app had no tests and no way to run any: package.json shipped
dev/build/preview/typecheck, and CI installed Node and pnpm but never ran
anything with them. Its densest logic was module-private, so even with a
runner none of it was reachable.
Extracts four pure modules out of DOM-heavy ones — tree.ts (directory
grouping), keys.ts (terminal escape encoding), paths.ts (completion
arithmetic), html.ts (one escaper, replacing four copies). Extraction
rather than `export` because attach.ts imports xterm's CSS at module
level, which a node test cannot load.
CatalogStore takes an injectable socket factory, scheduler and refetch, so
the reducer and the backoff schedule run without a server. snapshot() now
returns a copy: it returned the live object while events mutated it in
place, so listeners could not diff and every event rebuilt the whole tree.
36 tests across 6 files, and a `web` CI job running typecheck, test and
build. vitest is pinned to 2.x — 4.x requires vite >= 6 and this is vite 5.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>