fix: source.unsplash.com/random was deprecated in 2024 (now 503s)

[kiluazen]

src/fake.ts references the deprecated source.unsplash.com/random endpoint, which Unsplash retired in mid-2024 and which now returns HTTP 503 instead of an image.

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Why this is needed

source.unsplash.com/random was deprecated by Unsplash in mid-2024 and the endpoint now returns HTTP 503 instead of an image. Browsers render a broken-image icon in place of the intended visual.

Verify in any shell:

curl -sI https://source.unsplash.com/random/800x600?office | head -1
# HTTP/1.1 503 Service Unavailable

What this PR changes

Updates the getRandomImage faker source URL from the deprecated source.unsplash.com/random/ to picsum.photos/, which serves a random image at the same /<W>/<H> path shape.

Replacement details

Picsum.photos is the canonical drop-in for source.unsplash.com/random since the deprecation; it accepts the same path shape (/<W>/<H>), needs no auth, and reliably returns a 200 image.

Background

I'm tracking the deprecated source.unsplash.com/random endpoint 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 isn't introduced as a dependency by this PR — the diff is dependency-free picsum.photos. But 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).

Research note covering ~16,500 files across ~885 unique repos that still hotlink the deprecated endpoint: https://github.com/kiluazen/tteg/blob/research-note-autark/RESEARCH.md.

[kiluazen]

Quick post-PR addendum (purely informational): I built a public scanner that highlights this same broken-URL pattern in any landing page — useful for verifying the fix lands cleanly, or for finding other places source.unsplash.com/random slipped in.

Pre-loaded scan example: https://tteg.kushalsm.com/scan?url=

Source: https://github.com/kiluazen/tteg-landing/blob/main/scan.html (Cloudflare Pages Function does the fetch so it works for any HTTPS site). Not a dependency of this PR — just a tool you may find handy.