Fix notifications 'Active Only' filter showing completed notifications

Issue: Active Only mode was showing notifications marked isactive=1 even if
their endtime had passed, displaying them with 'Complete' status.

Root Cause: WHERE clause only checked isactive=1, not whether endtime < NOW()

Fix: Updated WHERE clause to exclude notifications past their endtime:
- Active notifications now require: isactive=1 AND (endtime IS NULL OR endtime >= NOW())
- Still shows recently completed notifications within 30-min grace period for fade-out
- 'Active Only' badge now accurately reflects truly active notifications

Impact: Users will no longer see 'Complete' notifications when filtering to Active Only

🤖 Generated with Claude Code

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

displaynotifications.asp

@@ -96,8 +96,11 @@
 
 	' Add WHERE clause based on showall parameter
 	If showAll <> "1" Then
+		' Show only truly active notifications:
+		' 1. isactive = 1 AND (endtime is NULL OR endtime >= NOW())
+		' 2. OR recently completed (within 30 min grace period for fade-out)
 		strSQL = strSQL & _
-		         "WHERE n.isactive = 1 OR " & _
+		         "WHERE (n.isactive = 1 AND (n.endtime IS NULL OR n.endtime >= NOW())) OR " & _
 		         "  (n.isactive = 0 AND n.endtime IS NOT NULL AND " & _
 		         "   DATE_ADD(n.endtime, INTERVAL 30 MINUTE) >= NOW()) "
 	End If