Update time formatting to German Time in timetable service and tool descriptions

Author: abeckDev

AbeckDev.DbTimetable.Mcp/Services/TimeTableService.cs

@@ -48,8 +48,9 @@ public async Task<string> GetStationBoardAsync(
         CancellationToken cancellationToken = default)
     {
         // Format: yyMMddHHmm (e.g., 2511051830 for 2025-11-05 18:30)
-        var dateParam = date?.ToString("yyMMdd") ?? DateTime.UtcNow.ToString("yyMMdd");
-        var hourParam = date?.ToString("HH") ?? DateTime.UtcNow.ToString("HH");
+        var germanTime = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, TimeZoneInfo.FindSystemTimeZoneById("Central European Standard Time"));
+        var dateParam = date?.ToString("yyMMdd") ?? germanTime.ToString("yyMMdd");
+        var hourParam = date?.ToString("HH") ?? germanTime.ToString("HH");
 
         using var request = new HttpRequestMessage(HttpMethod.Get, $"plan/{evaNo}/{dateParam}/{hourParam}");
         request.Headers.Add("DB-Client-Id", _config.ClientId);

AbeckDev.DbTimetable.Mcp/Tools.cs

@@ -46,7 +46,7 @@ public async Task<string> GetFullStationChanges(
         [Description("Get station board (departures and arrivals) for a specific station in hourly slices. Returns XML data with train schedules.")]
         public async Task<string> GetStationBoard(
             [Description("EVA station number (e.g., 8000105 for Frankfurt Hauptbahnhof)")] string evaNo,
-            [Description("Date and time in format 'yyyy-MM-dd HH:mm' (UTC). Leave empty for current time.")] string? dateTime = null)
+            [Description("Date and time in format 'yyyy-MM-dd HH:mm' (German Time). Leave empty for current time.")] string? dateTime = null)
         {
             try
             {
@@ -119,7 +119,7 @@ public async Task<string> GetStationBoard(
         public async Task<string> FindTrainConnections(
             [Description("Starting station name or EVA number (e.g., 'Frankfurt Hbf' or '8000105')")] string stationA,
             [Description("Destination station name or EVA number (e.g., 'Berlin Hbf' or '8011160')")] string stationB,
-            [Description("Date and time in format 'yyyy-MM-dd HH:mm' (UTC). Leave empty for current time.")] string? dateTime = null)
+            [Description("Date and time in format 'yyyy-MM-dd HH:mm' (German Time). Leave empty for current time.")] string? dateTime = null)
         {
             try
             {