feat: enhance mobile compatibility and debugging across authentication and system metrics

components/PWAInstallBanner.vue

@@ -3,7 +3,6 @@
     v-if="showBanner"
     class="pwa-install-banner"
     elevation="8"
-    color="primary"
     variant="elevated"
   >
     <v-card-text class="pa-4">
@@ -211,6 +210,8 @@ onMounted(() => {
   margin: 0 auto;
   border-radius: 12px !important;
   box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3) !important;
+  background: #a31515 !important; /* Solid MonacoUSA red */
+  background-image: none !important; /* Remove any gradients */
 }
 
 @media (max-width: 600px) {