Fixed path mapping issue

The path variable at line 323 (originally line 316) was always empty because:

Root Cause: The code was trying to read the ppth attribute from the <s> element (stop.Attribute("ppth")), but according to the Deutsche Bahn Timetable API XML schema, the ppth (path) attribute is actually located on the <dp> (departure) or <ar> (arrival) child elements, not on the parent <s> (stop) element.

The Fix:

Moved the departureElement declaration earlier in the loop
Read the ppth attribute from departureElement instead of stop
Removed the duplicate departureElement declaration later in the code
Now the code correctly retrieves the path information from <dp ppth="..."> and should be able to find train connections that go through both stations.

Author: abeckDev

AbeckDev.DbTimetable.Mcp/Services/TimeTableService.cs

@@ -313,9 +313,11 @@ private List<ConnectionInfo> FindConnectionsInTimetable(string timetableXml, str
             foreach (var stop in stops)
             {
                 // Check if this train goes to the destination by looking at the path (ppth) or final destination
-                var path = stop.Attribute("ppth")?.Value ?? "";
+                // The ppth attribute is on the dp (departure) element, not on the s (stop) element
+                var departureElement = stop.Element("dp");
+                var path = departureElement?.Attribute("ppth")?.Value ?? "";
                 var destination = stop.Element("tl")?.Attribute("f")?.Value ?? 
-                                 stop.Element("dp")?.Attribute("ppth")?.Value?.Split('|').LastOrDefault() ?? "";
+                                 path.Split('|').LastOrDefault() ?? "";
 
                 // Check if the destination station or path contains our target station
                 // This is a heuristic - the actual route might not be fully represented
@@ -338,7 +340,6 @@ private List<ConnectionInfo> FindConnectionsInTimetable(string timetableXml, str
                 var trainType = trainElement?.Attribute("c")?.Value ?? "";
                 var trainNumber = trainElement?.Attribute("n")?.Value ?? "";
 
-                var departureElement = stop.Element("dp");
                 if (departureElement == null) continue; // Only interested in departures
 
                 var scheduledDeparture = departureElement.Attribute("pt")?.Value;