fix(scroll): add scroll-margin-top to all feed entry types

Offsets scroll targets by header height + 1rem so marker clicks land
below the sticky nav, not behind it. Applies to both .journal-post
and .entry-card (story cards).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr

themes/intotheeast/css/style.css

@@ -97,6 +97,7 @@ body::after {
     border-bottom: 1px solid var(--color-border);
     padding-bottom: var(--space-8);
     transition: background 0.15s;
+    scroll-margin-top: calc(var(--site-header-height) + var(--space-4));
 }
 
 /* Card: photo variant */
@@ -163,6 +164,7 @@ body::after {
 .journal-post {
     border-bottom: 1px solid var(--color-border);
     padding-bottom: var(--space-8);
+    scroll-margin-top: calc(var(--site-header-height) + var(--space-4));
 }
 
 .journal-post-header {