Refactor: Streamline product management UI and enhance PWA behavior

**Product List Improvements:**
- Move Import/Export to settings menu for cleaner interface
- Replace Edit/Variants/Multi-Buys buttons with single Details action
- Remove Blazor UI button from product list
- Simplify product row actions for better mobile UX

**Product Details Enhancements:**
- Add Danger Zone section with Delete button at bottom
- Improve visual hierarchy and action placement

**Navigation Updates:**
- Remove hamburger menu toggle (desktop nav always visible)
- Rename Settings to Menu in mobile bottom nav
- Update settings drawer header and icon

**Code Cleanup:**
- Remove unused Blazor, Variations, and Variants endpoints (243 lines)
- Consolidate variant/multi-buy management within product details
- Clean up ProductsController for better maintainability

**PWA & Notifications:**
- Add proper PWA support detection (only show if browser supports)
- Implement session-based notification prompt tracking
- Prevent repeated prompts after dismissal in same session
- Respect permanent dismissal preferences
- Enhance iOS Safari detection and instructions

**Technical Details:**
- 6 files changed, 96 insertions(+), 286 deletions(-)
- Build successful with 0 errors
- All features production-ready

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

LittleShop/wwwroot/js/notifications.js

@@ -42,11 +42,37 @@ class AdminNotificationManager {
     }
 
     showAdminNotificationPrompt() {
+        // Check if notifications are supported
+        if (!('Notification' in window) || !('PushManager' in window)) {
+            console.log('Admin Notifications: Push notifications not supported in this browser');
+            return;
+        }
+
+        // Check if already enabled
+        if (window.pwaManager && window.pwaManager.pushSubscription) {
+            console.log('Admin Notifications: Already subscribed');
+            return;
+        }
+
         // Check if prompt already exists
         if (document.getElementById('admin-notification-prompt')) {
             return;
         }
 
+        // Check if dismissed in current session
+        const sessionDismissed = sessionStorage.getItem('notificationPromptDismissed');
+        if (sessionDismissed === 'true') {
+            console.log('Admin Notifications: Prompt dismissed this session');
+            return;
+        }
+
+        // Check if permanently dismissed
+        const permanentlyDismissed = localStorage.getItem('pushNotificationDeclined');
+        if (permanentlyDismissed === 'true') {
+            console.log('Admin Notifications: Notifications declined permanently');
+            return;
+        }
+
         const promptDiv = document.createElement('div');
         promptDiv.id = 'admin-notification-prompt';
         promptDiv.className = 'alert alert-warning alert-dismissible position-fixed';
@@ -74,7 +100,7 @@ class AdminNotificationManager {
                     </div>
                 </div>
             </div>
-            <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
+            <button type="button" class="btn-close" data-bs-dismiss="alert" id="close-notification-prompt"></button>
         `;
 
         document.body.appendChild(promptDiv);
@@ -84,6 +110,7 @@ class AdminNotificationManager {
             try {
                 await this.enableNotifications();
                 promptDiv.remove();
+                sessionStorage.setItem('notificationPromptDismissed', 'true');
             } catch (error) {
                 console.error('Failed to enable notifications:', error);
                 this.showNotificationError('Failed to enable notifications. Please try again.');
@@ -92,8 +119,14 @@ class AdminNotificationManager {
 
         document.getElementById('remind-later').addEventListener('click', () => {
             promptDiv.remove();
-            // Set reminder for 1 hour
-            setTimeout(() => this.showAdminNotificationPrompt(), 60 * 60 * 1000);
+            // Mark as dismissed for this session only
+            sessionStorage.setItem('notificationPromptDismissed', 'true');
+        });
+
+        document.getElementById('close-notification-prompt').addEventListener('click', () => {
+            promptDiv.remove();
+            // Mark as dismissed for this session only
+            sessionStorage.setItem('notificationPromptDismissed', 'true');
         });
     }