Add PageNoteButton to various components for enhanced note management

WebApp/Components/Pages/Notes.razor

@@ -54,7 +54,8 @@
                         <MudExpansionPanel @key="@($"note-{noteId}")"
                                            Icon="@Icons.Material.Filled.Note"
                                            IsExpanded="@isExpanded"
-                                           ExpandedChanged="@((bool expanded) => OnPanelExpandedChanged(noteId, expanded))">
+                                           ExpandedChanged="@((bool expanded) => OnPanelExpandedChanged(noteId, expanded))"
+                                           Class="@MarkdownHelper.GetNoteColorClass(noteId)">
                             <TitleContent>
                                 <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="2" Class="flex-grow-1">
                                     <MudText Typo="Typo.body1" Class="flex-grow-1" Style="min-width: 0;">
@@ -402,7 +403,7 @@
 
             var result = await DialogService.ShowMessageBox(
                 "Delete Note",
-                (MarkupString)$"Are you sure you want to delete <b>{note.Title}</b>? This cannot be undone.",
+                (MarkupString)$"Are you sure you want to delete <b>{note.Title}</b>? You can restore it later from the 'Show Removed' view.",
                 yesText: "Yes",
                 noText: "Cancel");