UI Stabilization: Global color theme updates (#75B2D6), AI Assistant styling refactor, and navigation fixes

memento-note/components/settings/SettingsNav.tsx

@@ -40,10 +40,10 @@ export function SettingsNav({ className }: SettingsNavProps) {
           key={section.id}
           href={section.href}
           className={cn(
-            'flex items-center gap-2 pb-3 pt-4 text-xs font-semibold uppercase tracking-wider transition-colors whitespace-nowrap border-b-2',
+            'flex items-center gap-2 pb-3 pt-4 text-[11px] font-bold uppercase tracking-[0.15em] transition-all whitespace-nowrap border-b-2',
             isActive(section.href)
-              ? 'border-primary text-foreground'
-              : 'border-transparent text-muted-foreground hover:text-foreground'
+              ? 'border-[#D4A373] text-[#1C1C1C]'
+              : 'border-transparent text-[#1C1C1C]/40 hover:text-[#1C1C1C]'
           )}
         >
           {section.icon}