fix(deps): update dependency astro to v4.15.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
astro (source)	4.14.6 -> 4.15.0

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Release Notes

withastro/astro (astro)

v4.15.0

Minor Changes

• #​11729 1c54e63 Thanks @​ematipico! - Adds a new variant sync for the astro:config:setup hook's command property. This value is set when calling the command astro sync.

  If your integration previously relied on knowing how many variants existed for the command property, you must update your logic to account for this new option.

• #​11743 cce0894 Thanks @​ph1p! - Adds a new, optional property timeout for the client:idle directive.

  This value allows you to specify a maximum time to wait, in milliseconds, before hydrating a UI framework component, even if the page is not yet done with its initial load. This means you can delay hydration for lower-priority UI elements with more control to ensure your element is interactive within a specified time frame.

  <ShowHideButton client:idle={{ timeout: 500 }} />

• #​11677 cb356a5 Thanks @​ematipico! - Adds a new option fallbackType to i18n.routing configuration that allows you to control how fallback pages are handled.

  When i18n.fallback is configured, this new routing option controls whether to redirect to the fallback page, or to rewrite the fallback page's content in place.

  The "redirect" option is the default value and matches the current behavior of the existing fallback system.

  The option "rewrite" uses the new rewriting system to create fallback pages that render content on the original, requested URL without a browser refresh.

  For example, the following configuration will generate a page /fr/index.html that will contain the same HTML rendered by the page /en/index.html when src/pages/fr/index.astro does not exist.

  // astro.config.mjs
  export default defineConfig({
    i18n: {
      locals: ['en', 'fr'],
      defaultLocale: 'en',
      routing: {
        prefixDefaultLocale: true,
        fallbackType: 'rewrite',
      },
      fallback: {
        fr: 'en',
      },
    },
  });

• #​11708 62b0d20 Thanks @​martrapp! - Adds a new object swapFunctions to expose the necessary utility functions on astro:transitions/client that allow you to build custom swap functions to be used with view transitions.

  The example below uses these functions to replace Astro's built-in default swap function with one that only swaps the <main> part of the page:

  <script>
    import { swapFunctions } from 'astro:transitions/client';
  
    document.addEventListener('astro:before-swap', (e) => { e.swap = () => swapMainOnly(e.newDocument) });
  
    function swapMainOnly(doc: Document) {
      swapFunctions.deselectScripts(doc);
      swapFunctions.swapRootAttributes(doc);
      swapFunctions.swapHeadElements(doc);
      const restoreFocusFunction = swapFunctions.saveFocus();
      const newMain = doc.querySelector('main');
      const oldMain = document.querySelector('main');
      if (newMain && oldMain) {
        swapFunctions.swapBodyElement(newMain, oldMain);
      } else {
        swapFunctions.swapBodyElement(doc.body, document.body);
      }
      restoreFocusFunction();
    };
  </script>

  See the view transitions guide for more information about hooking into the astro:before-swap lifecycle event and adding a custom swap implementation.

• #​11843 5b4070e Thanks @​bholmesdev! - Exposes z from the new astro:schema module. This is the new recommended import source for all Zod utilities when using Astro Actions.

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