feat(front): unify all front user pages to DESIGN.md brand #5B5FED; fix decimal-rgba off-brand purples missed by hex normalization (MarketPage focus shadow, LoginPage radial glow)

frontend/src/pages/front/AssetsPage.css

@@ -207,7 +207,7 @@
 }
 
 .asset-novel-card:hover {
-  border-color: #F59E0B;
+  border-color: #E8922C;
   box-shadow: var(--shadow-md);
   transform: translateY(-2px);
 }
@@ -647,7 +647,7 @@
   gap: 4px;
   padding: 2px 6px;
   background: #EEEDFF;
-  color: #6C63FF;
+  color: #5B5FED;
   border-radius: var(--radius-xs);
   font-size: 11px;
   font-weight: 600;