fix: via.placeholder.com shut down in 2024 (now connection-refused)

[kiluazen]

packages/react-components/src/components/InviteAgents/InviteAgents.mdx references via.placeholder.com/*. The service was shut down in 2024 and the DNS record no longer resolves.

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Why this is needed

via.placeholder.com was shut down in 2024 and its DNS record no longer resolves — every request now hangs or returns a connection error. Any example that references it renders a broken-image icon (and any code that depends on a 200 from it silently breaks).

Verify in any shell:

curl -sI --max-time 3 https://via.placeholder.com/300x200 || echo "connection refused / DNS gone"

What this PR changes

Fixes the agent-mock avatar URL in the InviteAgents design-system story so the storybook component renders a real avatar placeholder for reviewers/developers.

Replacement details

Docs/storybook-only. Dimensions preserved.

Background

I'm tracking dead image-placeholder endpoints (source.unsplash.com/*, via.placeholder.com/*, placekitten.com/*) across public repos as part of tteg, a tiny CLI/HTTP API I built so projects can drop in real Unsplash photos without registering an Unsplash app or managing API keys. tteg is not a dependency of this PR — the diff uses the dependency-free canonical replacement (placehold.co, which accepts the same path shape as via.placeholder.com). If you want topic-matched real photos as a follow-up, the no-key HTTP API is at https://tteg-api-53227342417.asia-south1.run.app/search?q=<query>&n=1 (CORS-on, no auth).

One extra artifact you may find handy: a public scanner at https://tteg.kushalsm.com/scan?url= that highlights dead-placeholder patterns in any landing page — useful for verifying the fix lands and for finding other places dead URLs slipped in. Source: https://github.com/kiluazen/tteg-landing/blob/main/scan.html.

Summary by CodeRabbit

• Documentation
  • Updated example asset references in component documentation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 0292ed2a-6c1b-444c-a3fc-a3de7608cad3

📥 Commits

Reviewing files that changed from the base of the PR and between ca2b564 and 66d5e0c.

📒 Files selected for processing (1)

• packages/react-components/src/components/InviteAgents/InviteAgents.mdx

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Walkthrough

Updated a placeholder image URL in the InviteAgents component documentation example, switching from one placeholder service to another.

Changes

Cohort / File(s)	Summary
Documentation packages/react-components/src/components/InviteAgents/InviteAgents.mdx	Avatar placeholder URL changed from via.placeholder.com to placehold.co.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly addresses the main change: replacing a dead placeholder URL (via.placeholder.com) with a working alternative (placehold.co) due to service shutdown.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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