refactor: rename Settings tab to About, remove SettingsPage component

src/app/page.tsx

@@ -8,7 +8,7 @@ import BottomNav from '@/components/BottomNav';
 import DailyEntry from '@/components/DailyEntry';
 import CalendarView from '@/components/CalendarView';
 import ReflectionsList from '@/components/ReflectionsList';
-import SettingsPage from '@/components/SettingsPage';
+import AboutPage from '@/components/AboutPage';
 import HomePage from '@/components/HomePage';
 import AnsweredPrayers from '@/components/AnsweredPrayers';
 import { db } from '@/lib/firebase';
@@ -26,7 +26,7 @@ interface Prayer {
 }
 
 export default function Home() {
-  const [activeTab, setActiveTab] = useState<'home' | 'compose' | 'journal' | 'answered' | 'reflections' | 'settings'>('home');
+  const [activeTab, setActiveTab] = useState<'home' | 'compose' | 'journal' | 'answered' | 'reflections' | 'about'>('home');
   const [prayers, setPrayers] = useState<Prayer[]>([]);
   const [editingPrayer, setEditingPrayer] = useState<Prayer | null>(null);
   
@@ -240,7 +240,7 @@ export default function Home() {
         />
       )}
 
-      {activeTab === 'settings' && <SettingsPage userEmail={user.email || undefined} />}
+      {activeTab === 'about' && <AboutPage userEmail={user.email || undefined} />
     </div>
   );
 }