Give .gallery-cols-5 the width its own pattern implies

[ptr727]

Follow-up to #40, which found this and deliberately did not fix it. That change claimed to alter no rendered byte — the evidence that a 125-file vendored theme was safely restored to upstream — so a width change had to wait for its own pull request. This is it.

The change

One value in assets/css/extended/custom.css:

 .gallery-cols-5 figure {
-    width: 25%;
+    width: 20%;
 }

The gallery rules are 1/N widths — 100%, 50%, 33.3333333333%, 25%, …, 16.666666666% — and the five-column case repeated the four-column 25%. That is the shape of a copied line rather than a decision.

Correcting the finding's stated impact

The review comment on #40 said this "only allows 4 columns per row", and I repeated that. Checked against the rendered page, it is not observable. Exactly one page passes cols="5", and its gallery is empty:

{{< gallery cols="5" >}}
{{< /gallery >}}

which emits <div class="gallery gallery-cols-5"></div> with no figures inside. No figure anywhere on the site is laid out by this rule.

So this is a latent fix: it is what the next cols="5" gallery will need, not a defect visible today. Shipping it anyway because it is one character and removes a landmine, but the justification is correctness of the rule, not a repaired page.

The empty shortcode is a content artifact from the WordPress import. Left alone — content/ is an imported archive that style sweeps do not reach, per TODO.md.

Verification

• Rule-level diff of the emitted stylesheet is exactly one line, 25% to 20%, with nothing else in the sheet touched.
• All 340 built pages differ, and per page the only change is the <link> carrying the stylesheet's fingerprint hash and integrity attribute. That is expected: the sheet is fingerprinted, so any CSS byte rewrites every page's link.
• Build clean under hugo --gc --minify --panicOnWarning (local Hugo is v0.164.0 extended, the version .github/actions/install-hugo/action.yml pins and SHA256-verifies).
• URL contract passes: 328/328 golden, 778/778 legacy images, 1012/1012 local assets.
• themes/PaperMod/ still byte identical to upstream 154d006e.
• markdownlint and editorconfig-checker clean.

TODO.md loses the Open decisions entry that recorded this, since it is now done.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR fixes the .gallery-cols-5 figure width in the site’s custom PaperMod extension CSS so the five-column gallery rule follows the established 1/N pattern used by the other gallery-cols-* rules, and removes the corresponding “open decision” entry from TODO.md.

Changes:

• Correct .gallery-cols-5 figure from width: 25% to width: 20% in assets/css/extended/custom.css.
• Remove the now-resolved .gallery-cols-5 width note from TODO.md.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
assets/css/extended/custom.css	Fixes the five-column gallery width to match the existing 1/N column-width pattern.
TODO.md	Removes the tracking item for the .gallery-cols-5 width discrepancy now that it’s addressed.