fix(minifier): Keep attribute quotes in the SWC HTML minifier

[Hashim1999164]

Fixes #12368

The SWC HTML minifier drops quotes from attributes, so og:image becomes property=og:image. WhatsApp then ignores the image in link previews.

Passing quotes: true keeps quoted attributes while still using the fast SWC minifier. The Terser HTML minifier path already keeps quotes.

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[akash-sharma8]

I independently reproduced the issue and verified the same fix locally with quotes: true.

I also added a regression test to ensure HTML attribute quotes are preserved, and verified that the test fails when quotes: true is removed.

The full test suite passes locally: 184 test files / 2944 tests.

So I can confirm this approach fixes the issue from my side as well. Thanks!

[akash-sharma8]

I also verified the fix on the PR deploy preview.

The generated HTML now preserves the attribute quotes:

I also tested the PR deploy URL in WhatsApp, and the Open Graph image is rendered correctly in the link preview.

So this confirms that quotes: true preserves the attributes as intended and resolves the compatibility issue described in #12368

[johnnyreilly]

I also tested the PR deploy URL in WhatsApp, and the Open Graph image is rendered correctly in the link preview.

The screenshot from @slorber here:

#12368 (comment)

Show the open graph image preview not working in WhatsApp. But you say it works for you?

[akash-sharma8]

Yes — I tested the exact PR deploy URL in WhatsApp from my side, and the Open Graph image is rendered correctly in the preview.

I also verified the generated HTML directly and confirmed that the og:image attributes are quoted:

So the fix does preserve the attribute quotes as intended. The difference in results may be related to WhatsApp's preview caching. I've attached a screenshot of the WhatsApp preview from my side for reference.

[johnnyreilly]

Actually I have been bitten by the caching - I had to restart my phone in between testing to flush it (possibly there's easier methods)

[akash-sharma8]

That makes sense — thanks for confirming! I also suspected WhatsApp caching since the PR deploy was working correctly on my side.

[slorber]

hmmm weird, now it works for me while it didn't before

LGTM

[slorber]