Feed form: relays and an every-post firehose; its Back works; a stronger new-post tint

- The new/edit feed form gets a Relays field (read this feed from these
  relays only) and "Every post on these relays", which saves a firehose
  feed (optionally curated) named after its relay and hides the people,
  packs and topics it doesn't need. It used to take a hand-typed
  /feed/all?r= link.
- The form's Back did nothing visible: opening it made no history entry,
  so Back went to the page behind the feed and left the form up. The
  editor (and the gear page's Spending/Savings view) are now part of the
  navigation state.
- New-post tint 9% -> 16% green in light mode; dark mode unchanged.
- tools/feed-editor-relays-test.js.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Dmcrt9KyNDKVWFKnb8BREo

1 files changed, 4 insertions, 1 deletions

diff --git a/src/style.css b/src/style.css
index 7ef428c..5bb171a 100644
--- a/src/style.css
+++ b/src/style.css
@@ -964,12 +964,15 @@ html.no-scroll { overflow: hidden; scrollbar-gutter: auto; }
    side shadows carry the tint through the list's padding to its edges. */
 .notes-feed > .row { transition: background-color 3s ease-out, box-shadow 3s ease-out; }
 .notes-feed > .row.note-fresh {
-  --fresh-bg: color-mix(in srgb, var(--green) 9%, var(--paper));
+  /* 9% was a whisper on white; dark mode keeps it (the green carries more there) */
+  --fresh-bg: color-mix(in srgb, var(--green) 16%, var(--paper));
   background-color: var(--fresh-bg);
   box-shadow: -14px 0 0 var(--fresh-bg), 14px 0 0 var(--fresh-bg);
 }
 
 
+:root[data-theme="dark"] .notes-feed > .row.note-fresh { --fresh-bg: color-mix(in srgb, var(--green) 9%, var(--paper)); }
+
 /* Inline move-money panel on the balance card. */
 .balance-move { gap: 10px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); text-align: left; }
 /* balance carousel: the other face peeks at the card's edge and drags into