Merge branch 'claude/great-wiles-945b3f': brand-divider 애니메이션 10px→50%→10px 24s 주기로 변경

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/static/styles.css

@@ -146,18 +146,18 @@ a { color: inherit; text-decoration: none; }
 }
 
 .brand-divider {
-  width: 48px;
+  width: 10px;
   height: 3px;
   background: var(--blue);
   border-radius: 2px;
   margin-top: 28px;
-  animation: divider-breathe 10s ease-in-out infinite;
+  animation: divider-breathe 24s ease-in-out infinite;
 }
 
 @keyframes divider-breathe {
-  0%   { width: 48px; }
-  50%  { width: 100%; }
-  100% { width: 48px; }
+  0%   { width: 10px; }
+  50%  { width: 50%; }
+  100% { width: 10px; }
 }
 
 .brand-footer {