…DX (#16892)

* fix(dev): invalidate SSR dev-css virtual modules on CSS file changes to prevent stale inline styles

* Update hmr-reload.test.ts

* Update hmr-css-invalidation.test.ts

* Update hmr-css-invalidation.test.ts

* Create css-dev-css-hmr.test.ts

* Create astro.config.mjs

* Create [slug].astro

* Create global.css

* Update css-dev-css-hmr.test.ts

* Fix Lint errors css-dev-css-hmr.test.ts

* fix fixture paths

* fix fixture path

* delete old path

* delete old path

* cover ?raw css imports with srr invalidation

* add comments

* fix test: expect [] instead of undefined

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Co-authored-by: astrobot-houston <fred+astrobot@astro.build>

… shared chunks (#17044)

* fix(hmr): handle middleware directory file changes during dev

* fix: add missing type annotation to middleware HMR test

* refactor: extract isMiddlewarePath and test the real function

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Co-authored-by: Matthew Phillips <matthew@matthewphillips.info>

#17035)

Co-authored-by: Matthew Phillips <matthew@matthewphillips.info>

* fix(render): honour compressHTML when joining head elements

The separator between rendered <link> and <script> tags in
renderAllHeadContent was hardcoded to '\n', ignoring the
existing result.compressHTML flag used elsewhere in the pipeline.

Switch to a conditional separator so compressed output omits
newlines between head elements, consistent with doctype injection and other compressHTML-aware rendering paths.

* Create fix-compress-html-head-join.md

* Update head.ts

* Update head.ts

* Update head.ts

…tic builds with preserveBuildClientDir\n\nWhen an adapter sets preserveBuildClientDir (e.g. @astrojs/cloudflare), static builds\nemit images to build.client (dist/client/_astro/) but the image optimization step was\nlooking in outDir (dist/_astro/), causing ENOENT errors.\n\nReplace the hardcoded outDir fallback in prepareAssetsGenerationEnv with\ngetClientOutputDirectory(), which correctly respects the preserveBuildClientDir\nadapter feature.\n\nFixes #16919 (#17050)

… rejecting (#16960) (#16967)

… running `astro add cloudflare` command (#16762)

* feat: cloudflare wrangler config includes a schema

* feat(docs): add changeset

* Tweak changeset

---------

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>

* fix: supporting numbers in references

* Tweak changeset

---------

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>

…17066)

Co-authored-by: Armand Philippot <git@armand.philippot.eu>

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>