The docs e2e suite clicked navbar and sidebar controls before Vue hydrated the
multi-locale bundle, so the clicks were swallowed. That raced the Pagefind
search open (filed as #551), the appearance toggle, and the homepage and
sidebar navigation tests. The old search tests also matched an input
placeholder the config overrides, so they failed against a working build.
Add a waitForHydration helper (gates on #app.__vue_app__, set inside Vue's
app.mount()) and an openDocsSearch helper, and route the affected tests through
them. Search itself was never broken; this change is test-only. Docs e2e suite
is green (43/43).
Closes#551
Shared Claude Code translation pipeline (scripts/i18n, no API key) plus Astro/VitePress/Scalar i18n wiring. Landing and API reference translated into all 20 languages; docs i18n wiring + English source anchors. The translated docs markdown (apps/docs/<locale>/**, 3,620 files) follows in a companion PR because it exceeds GitHub's per-PR CI file limit.
