## What kind of change does this PR introduce?
- Bug fix that resolves DEPR-396
- Additional improvements to blog post image handling
## What is the current behavior?
Blog post Open Graph metadata often prefers `imgThumb` over `imgSocial`,
so social previews on X, iMessage, and similar surfaces can render the
on-site thumbnail instead of the intended social image.
The image selection and path-normalization rules are also duplicated
across blog surfaces, which makes the precedence rules easy to drift.
## What is the new behavior?
- Centralizes blog image handling in `apps/www/lib/blog-images.ts`
- Uses `imgSocial` first, then `imgThumb`, for blog OG/Twitter metadata
- Uses `imgThumb` first, then `imgSocial`, then the placeholder, for
blog thumbnails and post hero images
- Normalizes relative blog image paths into absolute URLs for metadata
- Adds warning-only validation during content reads/builds for partial
or malformed `imgSocial` / `imgThumb` config
- Updates a few recent blog posts so `imgThumb` is a thumbnail-only
asset instead of duplicating the social image
## Additional context
- Replaces #42319 with the additional above fixes
- Added unit coverage for the shared image helper
---------
Co-authored-by: Alan Daniel <stylesshjs@gmail.com>
This PR removes all CMS code from the `www` app. This includes fetching
of blog posts, API routes for proxying blog posts and types.
All functionality should remain the same (and the number of blog posts
should be the same).
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Removed CMS integration, APIs, preview/draft/revalidate endpoints,
related env vars and dependency; switched to static markdown-only blog
pipeline.
* **Refactor**
* Simplified image and author resolution, tightened component props to
static post shapes, and migrated imports to path aliases.
* **Documentation**
* Deleted CMS integration docs and rich-text conversion helpers.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
* show cms blog posts in www
* remove contentlayer from www
* outputFileTracingExcludes
* update remotePatterns
* fetch cms posts server-side with revalidation
* add cms env vars to turbo.json
* add www env vars to turbo.json
* include cms posts in www sitemap
* add migration to remove image from cms post
* update cms meta image mapping in www
