fix: Escape ampersands in ToolStripMenuItem text to prevent mnemonic interpretation

Updated the text for next and second meeting display items to escape ampersands, ensuring they are displayed correctly without being interpreted as mnemonics.

Author: Marcus Markiewicz

src/ComingUpNextTray/TrayContext.cs

@@ -409,14 +409,17 @@ private void UpdateMenuState()
             string? fetchErr = this.app.GetLastFetchErrorForUi();
             if (!string.IsNullOrEmpty(fetchErr))
             {
-                this.nextMeetingDisplayItem.Text = UiText.FetchErrorPrefix + fetchErr;
+                // Escape ampersands so ToolStripMenuItem does not interpret them as mnemonics
+                this.nextMeetingDisplayItem.Text = (UiText.FetchErrorPrefix + fetchErr).Replace("&", "&&", System.StringComparison.Ordinal);
             }
             else
             {
-                this.nextMeetingDisplayItem.Text = next is null ? UiText.NoUpcomingMeetings : NextMeetingSelector.FormatTooltip(next, DateTime.Now);
+                string nextText = next is null ? UiText.NoUpcomingMeetings : NextMeetingSelector.FormatTooltip(next, DateTime.Now);
+                this.nextMeetingDisplayItem.Text = nextText.Replace("&", "&&", System.StringComparison.Ordinal);
             }
 
-            this.secondMeetingDisplayItem.Text = second is null ? string.Empty : NextMeetingSelector.FormatTooltip(second, DateTime.Now);
+            string secondText = second is null ? string.Empty : NextMeetingSelector.FormatTooltip(second, DateTime.Now);
+            this.secondMeetingDisplayItem.Text = secondText.Replace("&", "&&", System.StringComparison.Ordinal);
             this.secondMeetingDisplayItem.Visible = second is not null;
 
             // Update last updated timestamp line