Home connection screens for Oficina apps. Parse `Templates()` with the app's
page layout, then render `home-connect` with `PageData`. The app supplies every
label, so its locale selection applies to the whole screen. Twelve caller
locales are exercised by the component tests.

For an OAuth continuation, render `home-oauth-head` in the document head and
`home-oauth` in the body with the same `OAuthData`. Validate the destination
before rendering; this package does not perform authentication or decide which
hosts to trust. The shared Home connection package owns those checks.

Both screens work with JavaScript disabled. They compose Rastrillo's existing
attribute-based page, box and button primitives with the suite's theme;
there are no new colors or CSS selectors. The Back action uses the button target
size, and addresses isolate bidirectional text and wrap at narrow widths.