web: declutter the UI, fix date arrows, red * for bookmarked verses in reader

Daily page (index.html):
- Date arrows now step the date input client-side and dispatch its change, so
  they move relative to the CURRENT day and update the shown date (they were
  stuck one step from the initial date, computed server-side).
- Theme picker removed (theme lives only in /settings now); bookmarks link
  removed (bookmarks belong to the reader, not the daily readings).
- reader/settings nav + the download links move to a right-aligned .controls-side
  cluster; essential controls (date, lectionary, versions, parts, layout, mono)
  stay on the left. mono stops its change bubbling so it no longer refetches.

Reader (reader.html + RenderPassage): a bookmarked verse now shows a red "*"
(end of line in columns, after the verse number interlinear). Threaded a
marked set (keyed "chap:verse") through the reader render path only; the daily
RenderReadings path is untouched.

Settings (settings.html): Save button moved to the top; removed offline (dead),
width and pager (CLI/TUI-only, no web effect) -- their config values are
preserved since the handler no longer reads/zeroes them.

Footer: source/licence centred.

Web tests + full suite green both build modes.

1 files changed, 15 insertions, 0 deletions

diff --git a/internal/web/static/base.css b/internal/web/static/base.css
index d367c15..2faabc5 100644
--- a/internal/web/static/base.css
+++ b/internal/web/static/base.css
@@ -293,10 +293,24 @@ a {
 .bookmark .tags { font-size: 0.85rem; }
 .tag-filter { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-bottom: var(--space-2); font-family: var(--font-ui); }
 
+/* Utility cluster (nav links + downloads), pushed to the right of the controls
+ * bar; wraps beneath when the row is narrow. */
+.controls-side {
+  margin-left: auto;
+  display: inline-flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: var(--space-2);
+}
+
 /* Export links (download the readings). */
 .export { font-family: var(--font-ui); font-size: 0.85rem; }
 .export a { margin: 0 0.15rem; }
 
+/* Bookmark marker: a red "*" flagging a bookmarked verse in the reader. A fixed
+ * semantic red (not a theme colour), visible on light and dark themes alike. */
+.vmark { color: #e5484d; font-weight: bold; padding-left: 0.15rem; }
+
 /* Licence footer: the AGPL-3.0 §13 source offer, on every full page.
  * Quiet by design but never hidden -- §13 asks for a PROMINENT offer, so
  * this must not be display:none'd or themed to invisibility. Colour (border
@@ -309,4 +323,5 @@ a {
   border-top-style: solid;
   font-family: var(--font-ui);
   font-size: 0.75rem;
+  text-align: center;
 }