Remove blockquote-style borders from topic pages

Removed left borders from topic overview and verse items for a
cleaner, less cluttered design.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

kjvstudy_org/templates/topic_detail.html

@@ -10,9 +10,6 @@
     font-size: 1.2rem;
     line-height: 1.9;
     margin: 1.5rem 0;
-    padding: 1rem;
-    border-left: 3px solid var(--border-color-darker);
-    background: var(--code-bg);
 }
 
 .subtopics-container {
@@ -82,8 +79,6 @@
 
 .verse-item {
     margin: 1rem 0;
-    padding-left: 1.5rem;
-    border-left: 2px solid var(--border-color);
 }
 
 .verse-ref {