Inter, one file where WordPress listed two, and a pin heading on line

Inter (#11): the pages are set in Inter's variable font, served from the
binary at /inter.woff2 as the icon is, with its OFL licence beside it in
web/. Classic keeps Lucida Grande, the 2004 app's face.

Double audio (#12): WordPress numbers each audio player on a page by
adding ?_=N to its file's URL, so a post that embeds the file it encloses
listed it twice, and it was downloaded twice. The parser keeps the first
of an item's enclosures that differ only by that number. At startup the
repeats already stored fold into the first; where only the repeat had
been downloaded its file moves to the first rather than being deleted.

Pin heading (#13): the rows' icon buttons kept the browser's side
padding, which pushed their 16px icon 3px right of centre, and the
heading's icon sat at the left of its column. Both are centred now, and
the heading row takes the pixel of border the rows have, so every
heading sits over its column.

Closes #11, closes #12, closes #13.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

CHANGELOG.md

@@ -24,6 +24,7 @@ The long form, with what was wrong before and how it was found, is in
 
 - Directory shows each feed as its cover art in a grid, title and subscriber count underneath,
   instead of a list. Popular and the Add a feed dialog keep their rows.
+- The pages are set in Inter, served by ipx itself. Classic keeps Lucida Grande.
 - Keeping an item is now pinning it: a thumbtack in place of the flag, and Pin, Pinned and Unpin
   in place of Keep, Kept and Stop keeping. A pinned item is still never deleted.
 - Currently Listening is its own place in the feed list, below Popular, instead of a section at
@@ -33,6 +34,11 @@ The long form, with what was wrong before and how it was found, is in
 
 ### Fixed
 
+- A WordPress post that embeds the file it encloses no longer lists, and downloads, that file
+  twice. Items that already had it twice are folded into one at startup, and the spare copy
+  deleted.
+- The pinned column's heading lines up with the pins under it, and every heading sits a pixel
+  further right, over its column.
 - The feeds left behind by an OPML subscription removed before ipx retired them are cleared at
   startup: forgotten if nothing was downloaded, kept as orphaned if something was. Feeds from it
   that have since been given their own settings stay as they are, with their items. Removing an