…route through correct runtime (#15946)\n\nThe serializedManifestPlugin generated a new random encryption key per environment, causing key mismatch between Node prerender and workerd SSR environments. This forced PR #15891 to route server islands through the Node prerender handler, which broke access to cloudflare:workers.\n\nFix: cache the key at plugin level so all environments share it, then revert the isRouteServerIsland workaround so server islands correctly fall through to the workerd runtime.

This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [@astrojs/check](https://github.com/withastro/astro/tree/main/packages/language-tools/astro-check) ([source](https://github.com/withastro/astro/tree/HEAD/packages/language-tools/astro-check)) | [`0.9.7` → `0.9.8`](https://renovatebot.com/diffs/npm/@astrojs%2fcheck/0.9.7/0.9.8) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@astrojs%2fcheck/0.9.8?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@astrojs%2fcheck/0.9.7/0.9.8?slim=true) |
| [astro](https://astro.build) ([source](https://github.com/withastro/astro/tree/HEAD/packages/astro)) | [`6.0.4` → `6.0.5`](https://renovatebot.com/diffs/npm/astro/6.0.4/6.0.5) | ![age](https://developer.mend.io/api/mc/badges/age/npm/astro/6.0.5?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/astro/6.0.4/6.0.5?slim=true) |

---

### Release Notes

<details>
<summary>withastro/astro (@&#8203;astrojs/check)</summary>

### [`v0.9.8`](https://github.com/withastro/astro/blob/HEAD/packages/language-tools/astro-check/CHANGELOG.md#098)

[Compare Source](https://github.com/withastro/astro/compare/@astrojs/check@0.9.7...@astrojs/check@0.9.8)

##### Patch Changes

- [#&#8203;15892](withastro/astro#15892) [`a2f597d`](withastro/astro@a2f597d) Thanks [@&#8203;Princesseuh](https://github.com/Princesseuh)! - Fixes Astro not being able to find astro check sometimes

- Updated dependencies \[[`7b4b254`](withastro/astro@7b4b254)]:
  - [@&#8203;astrojs/language-server](https://github.com/astrojs/language-server)@&#8203;2.16.5

</details>

<details>
<summary>withastro/astro (astro)</summary>

### [`v6.0.5`](https://github.com/withastro/astro/blob/HEAD/packages/astro/CHANGELOG.md#605)

[Compare Source](https://github.com/withastro/astro/compare/astro@6.0.4...astro@6.0.5)

##### Patch Changes

- [#&#8203;15891](withastro/astro#15891) [`b889231`](withastro/astro@b889231) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Fix dev routing for `server:defer` islands when adapters opt into handling prerendered routes in Astro core. Server island requests are now treated as prerender-handler eligible so prerendered pages using `prerenderEnvironment: 'node'` can load island content without `400` errors.

- [#&#8203;15890](withastro/astro#15890) [`765a887`](withastro/astro@765a887) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Fixes `astro:actions` validation to check resolved routes, so projects using default static output with at least one `prerender = false` page or endpoint no longer fail during startup.

- [#&#8203;15884](withastro/astro#15884) [`dcd2c8e`](withastro/astro@dcd2c8e) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Avoid a `MaxListenersExceededWarning` during `astro dev` startup by increasing the shared Vite watcher listener limit when attaching content server listeners.

- [#&#8203;15904](withastro/astro#15904) [`23d5244`](withastro/astro@23d5244) Thanks [@&#8203;jlukic](https://github.com/jlukic)! - Emit the `before-hydration` script chunk for the `client` Vite environment. The chunk was only emitted for `prerender` and `ssr` environments, causing a 404 when browsers tried to load it. This broke hydration for any integration using `injectScript('before-hydration', ...)`, including Lit SSR.

- [#&#8203;15933](withastro/astro#15933) [`325901e`](withastro/astro@325901e) Thanks [@&#8203;ematipico](https://github.com/ematipico)! - Fixes an issue where `<style>` tags inside SVG components weren't correctly tracked when enabling CSP.

- [#&#8203;15875](withastro/astro#15875) [`c43ef8a`](withastro/astro@c43ef8a) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Ensure custom prerenderers are always torn down during build, even when `getStaticPaths()` throws.

- [#&#8203;15887](withastro/astro#15887) [`1861fed`](withastro/astro@1861fed) Thanks [@&#8203;ematipico](https://github.com/ematipico)! - Fixes an issue where the build incorrectly leaked server entrypoint into the client environment, causing adapters to emit warnings during the build.

- [#&#8203;15888](withastro/astro#15888) [`925252e`](withastro/astro@925252e) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Fix a bug where `server:defer` could fail at runtime in prerendered pages for some adapters (including Cloudflare), causing errors like `serverIslandMap?.get is not a function`.

- [#&#8203;15901](withastro/astro#15901) [`07c1002`](withastro/astro@07c1002) Thanks [@&#8203;delucis](https://github.com/delucis)! - Fixes JSON schema generation for content collection schemas that have differences between their input and output shapes.

- [#&#8203;15882](withastro/astro#15882) [`759f946`](withastro/astro@759f946) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Fix `Astro.url.pathname` for the root page when using `build.format: "file"` so it resolves to `/index.html` instead of `/.html` during builds.

</details>

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