Implement comprehensive notification system for LittleShop

- Add admin PWA push notifications for order management
- Integrate TeleBot customer messaging service
- Add push notification endpoints and VAPID key support
- Implement order status notifications throughout workflow
- Add notification UI components in admin panel
- Create TeleBotMessagingService for customer updates
- Add WebPush configuration to appsettings
- Fix compilation issues (BotStatus, BotContacts DbSet)
- Add comprehensive testing documentation

Features:
- Real-time admin notifications for new orders and status changes
- Customer order progress updates via TeleBot
- Graceful failure handling for notification services
- Test endpoints for notification system validation

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/Controllers/PushNotificationController.cs

@@ -11,10 +11,12 @@ namespace LittleShop.Controllers;
 public class PushNotificationController : ControllerBase
 {
     private readonly IPushNotificationService _pushNotificationService;
+    private readonly ITeleBotMessagingService _teleBotMessagingService;
 
-    public PushNotificationController(IPushNotificationService pushNotificationService)
+    public PushNotificationController(IPushNotificationService pushNotificationService, ITeleBotMessagingService teleBotMessagingService)
     {
         _pushNotificationService = pushNotificationService;
+        _teleBotMessagingService = teleBotMessagingService;
     }
 
     /// <summary>
@@ -238,9 +240,63 @@ public class PushNotificationController : ControllerBase
             return StatusCode(500, new { error = ex.Message });
         }
     }
+
+    /// <summary>
+    /// Get TeleBot service status
+    /// </summary>
+    [HttpGet("telebot/status")]
+    [Authorize(AuthenticationSchemes = "Cookies", Roles = "Admin")]
+    public async Task<IActionResult> GetTeleBotStatus()
+    {
+        try
+        {
+            var isAvailable = await _teleBotMessagingService.IsAvailableAsync();
+            return Ok(new
+            {
+                available = isAvailable,
+                message = isAvailable ? "TeleBot service is available" : "TeleBot service is not available"
+            });
+        }
+        catch (Exception ex)
+        {
+            return StatusCode(500, new { error = ex.Message });
+        }
+    }
+
+    /// <summary>
+    /// Send test message to TeleBot customer
+    /// </summary>
+    [HttpPost("telebot/test")]
+    [Authorize(AuthenticationSchemes = "Cookies", Roles = "Admin")]
+    public async Task<IActionResult> SendTeleBotTestMessage([FromBody] TeleBotTestMessageDto testDto)
+    {
+        try
+        {
+            var success = await _teleBotMessagingService.SendTestMessageAsync(testDto.CustomerId, testDto.Message);
+
+            if (success)
+            {
+                return Ok(new { message = "TeleBot test message sent successfully" });
+            }
+            else
+            {
+                return StatusCode(500, new { error = "Failed to send TeleBot test message. Check TeleBot service status." });
+            }
+        }
+        catch (Exception ex)
+        {
+            return StatusCode(500, new { error = ex.Message });
+        }
+    }
 }
 
 public class UnsubscribeDto
 {
     public string Endpoint { get; set; } = string.Empty;
+}
+
+public class TeleBotTestMessageDto
+{
+    public Guid CustomerId { get; set; }
+    public string Message { get; set; } = "This is a test message from LittleShop admin!";
 }