Add missing showNotification function to settings.php

- Function was being called but never defined
- Added showNotification that uses showToast from app.js when available
- Includes fallback toast implementation for robustness

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

webapp/settings.php

@@ -883,6 +883,23 @@ require_once __DIR__ . '/includes/header.php';
 <?php
 // Set additional scripts to be loaded AFTER app.js
 $additionalScripts = '<script>
+// Notification helper - uses showToast from app.js if available, otherwise creates simple alert
+function showNotification(message, type = "success") {
+    if (typeof showToast === "function") {
+        showToast(message, type);
+    } else {
+        // Fallback toast implementation
+        const container = document.getElementById("toastContainer") || document.body;
+        const toast = document.createElement("div");
+        toast.className = `toast ${type}`;
+        toast.style.cssText = "position: fixed; bottom: 20px; right: 20px; padding: 12px 20px; border-radius: 8px; color: white; z-index: 10000; animation: slideIn 0.3s ease;";
+        toast.style.background = type === "error" ? "#dc3545" : type === "info" ? "#17a2b8" : "#28a745";
+        toast.textContent = message;
+        container.appendChild(toast);
+        setTimeout(() => toast.remove(), 4000);
+    }
+}
+
 // Initialize settings page
 document.addEventListener("DOMContentLoaded", function() {
     const currentTab = "' . $currentTab . '";