Design updates

timetracker.Client/Components/Pages/Changelog.razor

@@ -8,7 +8,7 @@
 
     @* ── Header ── *@
     <MudPaper Elevation="4" Class="pa-5 rounded-xl"
-              Style="background: linear-gradient(135deg, #3F51B5 0%, #1A237E 100%); color:white;">
+              Style="background: #1E293B; color:white;">
         <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="3">
             <MudIcon Icon="@Icons.Material.Filled.NewReleases" Style="color:white; font-size:2rem" />
             <MudStack Spacing="0">
@@ -71,7 +71,8 @@
         new("1.4", "08.06.2026", true,
         [
             new("Neu",     "Timebot implementiert"),
-            new("Upgrade", "Security hardening")
+            new("Upgrade", "Security hardening"),
+            new("Upgrade", "Changed coloring")
         ]),
         new("1.3", "08.06.2026", false,
         [