fix scrollbar and gather rules completed event

src/Backend/AutopilotMonitor.Functions/Functions/IngestEventsFunction.cs

@@ -97,6 +97,7 @@ namespace AutopilotMonitor.Functions.Functions
                 EnrollmentEvent? lastPhaseChangeEvent = null;
                 EnrollmentEvent? completionEvent = null;
                 EnrollmentEvent? failureEvent = null;
+                EnrollmentEvent? gatherCompletionEvent = null;
                 EnrollmentEvent? diagnosticsUploadedEvent = null;
                 string? failureReason = null;
                 DateTime? earliestEventTimestamp = null;
@@ -121,6 +122,10 @@ namespace AutopilotMonitor.Functions.Functions
                     {
                         completionEvent = evt;
                     }
+                    else if (evt.EventType == "gather_rules_collection_completed")
+                    {
+                        gatherCompletionEvent = evt;
+                    }
                     else if (evt.EventType == "enrollment_failed")
                     {
                         failureEvent = evt;
@@ -175,6 +180,20 @@ namespace AutopilotMonitor.Functions.Functions
                     );
                     _logger.LogWarning("{SessionPrefix} Status: Failed - {FailureReason} (transitioned={Transitioned})", sessionPrefix, failureReason, statusTransitioned);
                 }
+                else if (gatherCompletionEvent != null)
+                {
+                    // Gather rules collection completed — mark session as Succeeded.
+                    // Does not trigger enrollment stats or Teams notifications (not a real enrollment).
+                    await _storageService.UpdateSessionStatusAsync(
+                        request.TenantId,
+                        request.SessionId,
+                        SessionStatus.Succeeded,
+                        gatherCompletionEvent.Phase,
+                        completedAt: gatherCompletionEvent.Timestamp,
+                        earliestEventTimestamp: earliestEventTimestamp
+                    );
+                    _logger.LogInformation("{SessionPrefix} Status: Succeeded (gather_rules)", sessionPrefix);
+                }
                 else if (lastPhaseChangeEvent != null)
                 {
                     // Update current phase (still in progress)

src/Web/autopilot-monitor-web/app/globals.css

@@ -4,7 +4,8 @@
 
 html {
   scroll-behavior: smooth;
-  overflow-y: overlay;
+  overflow-y: scroll;
+  scrollbar-gutter: stable;
 }
 
 :root {