Fix favicon location and hydration mismatch by moving logos to public directory and wrapping auth UI in ClientOnly

pages/index.vue

@@ -8,6 +8,7 @@
             <img src="/logos/logo.png" alt="New Life Christian Church" class="h-16 w-auto" />
           </div>
           <div class="flex items-center gap-4">
+            <ClientOnly>
               <template v-if="isAuthenticated">
                 <NuxtLink 
                   to="/admin" 
@@ -29,6 +30,7 @@
               >
                 Admin Login
               </NuxtLink>
+            </ClientOnly>
           </div>
         </div>
         <div class="text-center mt-6">