fix PowerOutageSummary and optimize ALertService structure

src/GreenHome.Api/Controllers/PowerOutageController.cs

@@ -129,11 +129,12 @@ public class PowerOutageController : ControllerBase
                 return BadRequest(new { error = "شناسه دستگاه نامعتبر است" });
             }
 
+            // Get all outage events within the date range
             var filter = new PowerOutageFilter
             {
                 StartDateUtc = startUtc,
                 EndDateUtc = endUtc,
-                PageSize = int.MaxValue // Get all records for summary
+                PageSize = int.MaxValue
             };
 
             var result = await _powerOutageLogService.ListAsync(deviceId, filter, cancellationToken);
@@ -141,6 +142,26 @@ public class PowerOutageController : ControllerBase
             var outages = result.Items.Where(x => x.CurrentPower == 0).ToList();
             var connections = result.Items.Where(x => x.CurrentPower == 1).ToList();
 
+            // For outages that don't have a matching connect within the range,
+            // look beyond the end date to find when power was restored
+            var unmatchedOutages = outages
+                .Where(o => !connections.Any(c => c.TimestampUtc > o.TimestampUtc))
+                .ToList();
+
+            if (unmatchedOutages.Count > 0 && endUtc.HasValue)
+            {
+                // Fetch any connect events after the range end for unmatched outages
+                var extendedFilter = new PowerOutageFilter
+                {
+                    StartDateUtc = endUtc.Value,
+                    PageSize = int.MaxValue
+                };
+
+                var extendedResult = await _powerOutageLogService.ListAsync(deviceId, extendedFilter, cancellationToken);
+                var futureConnections = extendedResult.Items.Where(x => x.CurrentPower == 1).ToList();
+                connections.AddRange(futureConnections);
+            }
+
             // Calculate total downtime by pairing disconnects with subsequent connects
             long totalDowntimeSeconds = 0;
             var pairedOutages = new List<PowerOutagePairDto>();
@@ -167,7 +188,7 @@ public class PowerOutageController : ControllerBase
                 }
                 else
                 {
-                    // Still disconnected (no subsequent connect)
+                    // Still disconnected (no subsequent connect found anywhere)
                     pairedOutages.Add(new PowerOutagePairDto
                     {
                         DisconnectedAt = outage.TimestampUtc,