docs: use the dynamic README header endpoint

[AlemTuzlak]

Adopts the dynamic README header endpoint added in TanStack/tanstack.com#1076,
which is merged and live.

Every README banner in this repo now points a <picture> at
https://tanstack.com/api/readme/ instead of a committed PNG. The endpoint
renders 1800x450 in light and dark, so a branding change lands in every README
at once and dark-mode readers get a dark banner.

What changed

• 11 README(s) updated.
• Light and dark served through <picture>, per GitHub's guidance. The trailing <img> stays the light variant, as the fallback for renderers that ignore <picture> (npm, most editors).
• Per-package READMEs pass ?framework= so each banner shows its own package name instead of the generic library name.
• Deletes the now-unused media/header_pacer.png.

Verification

Every generated URL in this diff was requested against the live endpoint and
returned 200 image/png at 1800x450. git grep confirms no README still
references the old media/header_*.png path.

Heads up: deleting the committed PNG means npm pages for already-published
versions that embed the raw.githubusercontent.com/.../main/media/header_*.png
link will show a broken image, since that link is branch-pinned. New releases
pick up the endpoint URL.

Summary by CodeRabbit

• Documentation
  • Updated README branding across packages with responsive light- and dark-theme header images.
  • Added clearer, package-specific alternative text and consistent image sizing.
  • Removed repository link wrappers around selected stars badges.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ed945d26-4ef6-4d5f-bed1-c4cfc9c8ec16

📥 Commits

Reviewing files that changed from the base of the PR and between ef49ecc and ac2398e.

📒 Files selected for processing (6)

• packages/angular-pacer/README.md
• packages/preact-pacer-devtools/README.md
• packages/react-pacer-devtools/README.md
• packages/react-pacer/README.md
• packages/solid-pacer-devtools/README.md
• packages/solid-pacer/README.md

🚧 Files skipped from review as they are similar to previous changes (6)

• packages/react-pacer-devtools/README.md
• packages/react-pacer/README.md
• packages/solid-pacer-devtools/README.md
• packages/solid-pacer/README.md
• packages/angular-pacer/README.md
• packages/preact-pacer-devtools/README.md

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📝 Walkthrough

Walkthrough

The repository and package READMEs replace local header images with responsive, theme-aware hosted images. The root and Preact READMEs remove GitHub repository link wrappers from stars badges.

Changes

README branding

Layer / File(s)	Summary
Responsive README headers and badge markup README.md, packages/*/README.md	README headers now use hosted dark- and light-theme Pacer images with accessibility metadata. The root, Preact, and Solid READMEs remove GitHub repository link wrappers from stars badges.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: copilot

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main documentation change to use the dynamic README header endpoint.
Description check	✅ Passed	The description explains the changes, motivation, verification, and release impact in sufficient detail.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch readme-header-endpoint

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit ef49ecc

Command	Status	Duration	Result
nx run-many --targets=build --exclude=examples/**	✅ Succeeded	17s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-08-03 09:28:41 UTC

[Copilot]

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