Icons are Font Awesome Free, embedded as SVG

The ICON set is now Font Awesome Free 7.3.1: the 29 icons the page uses,
taken from svgs/solid and svgs/regular at that tag and embedded as SVG
paths, 12.8 KB in all. No webfont to download and nothing fetched from a
CDN. The CC BY 4.0 attribution is above the set, and in the README.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016HdTEWQNrzyFULijigkmMn

CHANGELOG.md

@@ -34,8 +34,9 @@ The long form, with what was wrong before and how it was found, is in
 - Buttons are icons, with the words in their tooltips: the Files pane (save, delete, view,
   download), an item's own buttons (mark read, keep, open the original), the feed header (scan,
   download latest, mark all read, settings, unsubscribe), and the Settings, feed settings and
-  Download latest dialogs (save, download, cancel). The icons are drawn, from one set, rather
-  than font characters: ⟳ ⤓ ↗ and the like came out thin and tiny and differed from font to
+  Download latest dialogs (save, download, cancel). The icons are Font Awesome Free, embedded as
+  SVG: only the ones used, no font to download, and nothing fetched from anyone else. They
+  replace font characters such as ⟳ ⤓ ↗, which came out thin and tiny and differed from font to
   font. Keep is a flag everywhere, as it was in the original.
 - A file's state and type are icons: a check when it is downloaded, a warning when it failed
   (the error is in the tooltip), and nothing while it waits; audio, video, image, PDF, torrent