Feed: threads cached locally, posts never inserted under the reader, rows keep their first look.

Work by Codex, wrapped up and verified here.

Threads: a viewed conversation is persisted (thread-cache.js, up to 12
threads / 160 events), so a refresh or a cached note link shows the root
and ancestors at once instead of the selected reply and a spinner; relays
are re-asked in the background and an empty answer keeps the cache.

Feed window (feed-window.js): arrivals are merged without inserting
between visible rows — a gap fill under the reader's eyes waits until
that part of the feed is offscreen, prepends anchor the reading position,
the notice counts what went in above, and only its tap goes to the top.
Older pages are prepared a few screens ahead; a page's pictures and faces
are decoded before it is shown.

Rows keep the presentation they were admitted with (feedPaint): background
profile and quote refreshes no longer rewrite text or swap faces mid-read;
media dimensions are known before paint. Thumbnails queue instead of being
dropped past the first three.

Tests: thread-cache, feed-window, feed-stability; feed-live updated for
the new arrival rules (the notice counts up while you read).

Co-Authored-By: Claude Fable 5.1 <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/avatar-thumb-test.js b/tools/avatar-thumb-test.js
index 413a92b..f70f6b3 100644
--- a/tools/avatar-thumb-test.js
+++ b/tools/avatar-thumb-test.js
@@ -182,7 +182,7 @@ try {
     const i = document.querySelector('.header-avatar img.punk') || document.querySelector('img.punk');
     return i ? i.getAttribute('src') : '';
   });
-  check('the default face is the small punk', /^punks-sm\//.test(punkSrc), punkSrc);
+  check('the default face is the small punk', /^\/punks-sm\//.test(punkSrc), punkSrc);
 
   // And someone we have never cached at all — the case that used to sit as a
   // blank circle until a relay answered — is drawn from their pubkey alone.
@@ -195,7 +195,7 @@ try {
     const i = document.querySelector('.header-avatar img.punk') || document.querySelector('img.punk');
     return i ? i.getAttribute('src') : '';
   });
-  check('an uncached face is drawn straight away, not left blank', /^punks-sm\//.test(strangerSrc), strangerSrc || 'blank circle');
+  check('an uncached face is drawn straight away, not left blank', /^\/punks-sm\//.test(strangerSrc), strangerSrc || 'blank circle');
 
   // A picture behind a redirect, loaded plainly first (as the avatar always
   // is) and only then thumbnailed.