Clean up the plugin page and make previews legible (#162)

[jherforth]

Closes #162.

Removing the Uploaded Widgets list is safe

Verified rather than assumed: both sections map the same uploadedWidgets array (:2314 and :2418). Plugin Settings already lists every uploaded widget — including legacy ones with no manifest — and already carries the delete button, plus the description and live preview the old list never had. Nothing is lost.

With it gone the repository spans the width it needs, and is renamed GitHub Plugin Repository. Upload Custom Widget keeps its place in the flow, now directly above the settings it feeds.

The previews were there but not much use

Browse thumbnails are 96×60 with objectFit: cover, so a plugin screenshot was cropped to an unreadable sliver. Clicking one now opens it at full size.

Three decisions inside that:

• The trigger is a button, not a bare <img>, so the enlarged view is reachable from a keyboard, with a :focus-visible ring and a labelled action.
• Dialog gives Escape-to-close alongside the X — and I checked Escape closes only the preview, leaving the Admin Panel (itself a Dialog) open underneath.
• The image is capped at natural width. width: 100% displayed a 624px screenshot at 852px — upscaled and soft, the opposite of why an enlarged view exists. Now 1:1.

Two things the issue didn't mention

• Empty state. Plugin Settings only renders when something is installed, so on a fresh install the page would have stopped at the upload button with nothing explaining the gap. Added a line.
• Orphaned strings. Removing the list orphaned widgets.uploaded and widgets.fileName. They're dropped from both locales — parity is enforced, so removing from one alone fails check:i18n. Four new keys cover the enlarged view and empty state, English and Spanish.

Verification

Driven in a browser against a running instance, with the browse list fed real preview PNGs from the plugins repo:

1. "Uploaded Widgets" section gone: true
   repo heading: GitHub Plugin Repository
   upload button present: true
2. repo list width: 1032px of 1280 viewport   (was ~half)
3. thumbnail is a labelled button: true
   dialog title: BucketList
   image loaded: true | natural: 624x460 | displayed: 624x460
4. closed via X: preview gone, admin panel still open
   closed via Escape: preview gone, admin panel still open

Client 176/176, translation parity passes, production build clean.

One thing I left alone

The browse list keeps its maxHeight: 400 internal scroll. At full width with 23 plugins that cap is starting to feel tight, but raising it wasn't asked for — easy follow-up if you want it.

🤖 Generated with Claude Code

[jherforth]

Raised the browse list cap (9287d5b).

The 400px was sized for the old half-width column — it cut off mid-row and showed under five of the 23 plugins.

I first tried a taller fixed value (680px) and it was wrong: on a 950px-high laptop it ran the list past the fold, leaving a scrolling list inside a scrolling dialog. It's now relative to the viewport, so it adapts instead:

viewport height	list height	before
950px (laptop)	475px	400px
1400px (wall display)	700px	400px
phone	360px	400px

Still capped rather than unbounded — the full list is 1994px, which would push the upload button and every plugin setting off the page.

Verified at both heights with all 23 plugins loaded: every row present, scrolling internally, nothing clipped. Client 176/176, translation parity passes, build clean.