Fix booking count filters, add admin notifications, and improve bookings

UI

backend/handlers/scheduling/default-hours.go

@@ -318,13 +318,13 @@ func GetAvailableHours(w http.ResponseWriter, r *http.Request) {
 
 	// Load bookings
 	bookingRows, _ := db.DB.Query(r.Context(), `
-		SELECT 
-			b.start_time, 
+		SELECT
+			b.start_time,
 			COALESCE(SUM(
-				CASE 
-					WHEN bs.override_duration_minutes IS NOT NULL AND bs.override_duration_minutes > 0 
-						THEN bs.override_duration_minutes 
-					ELSE s.duration_minutes 
+				CASE
+					WHEN bs.override_duration_minutes IS NOT NULL AND bs.override_duration_minutes > 0
+						THEN bs.override_duration_minutes
+					ELSE s.duration_minutes
 				END
 			), 0) AS total_duration
 		FROM bookings b