More consistent trailing slashes

[fretchen]

All internal links should be with trailing slashes.

[Copilot]

Pull request overview

This PR standardizes trailing-slash URL behavior across the website (components, pages, and tests) and updates internal navigation to use the project’s Link component, aligning routing with the static build structure.

Changes:

• Add trailing-slash normalization for internal links (notably in Link and EntryList) and update tests accordingly.
• Replace raw internal <a href="/..."> links with the Link component in key pages/posts to ensure consistent locale + slash behavior.
• Add website/public/CNAME for custom-domain hosting and update blog/internal links to use trailing slashes.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
website/test/Post.integration.test.tsx	Adds missing hook mocks to stabilize Post integration tests.
website/test/Link.test.tsx	New unit tests covering Link trailing-slash + locale behavior.
website/test/LanguageToggle.test.tsx	Updates expectations to match trailing-slash normalization.
website/test/EntryList.test.tsx	Updates href expectations and adds a basePath normalization test.
website/test/EntryList.filtering.test.tsx	Updates expected blog entry hrefs to include trailing slashes.
website/public/CNAME	Adds custom domain configuration for the deployed static site.
website/pages/x402/+Page.tsx	Switches internal anchors to Link for consistent routing behavior.
website/components/MetadataLine.tsx	Changes date parsing to avoid timezone-induced date shifts.
website/components/Link.tsx	Enforces trailing slashes on internal page links before locale prefixing.
website/components/EntryList.tsx	Normalizes basePath and ensures generated entry URLs include trailing slashes.
website/blog/x402_facilitator_imagegen.mdx	Updates internal markdown links to include trailing slashes.
website/blog/merkle_ai_batching.tsx	Uses Link for internal navigation links.
website/blog/merkle_ai_batching_fundamentals.tsx	Uses Link for internal navigation links.

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