Fix MkDocs header nav rendering broken icons for unmapped Ant Design icons

ScheduleOutlined was missing from the ANT_ICON_TO_MATERIAL mapping in
header-builder.service.ts, causing Material Icons to render raw text
characters ("S", "O") instead of a clock icon for the Shifts nav item.
Added the missing mapping and a toMaterialIcon() fallback that converts
any unmapped Ant Design icon name to snake_case Material Icons format.

Bunker Admin

api/src/modules/docs/header-builder.service.ts

@@ -50,6 +50,7 @@ const ANT_ICON_TO_MATERIAL: Record<string, string> = {
   HomeOutlined: 'home',
   SendOutlined: 'send',
   EnvironmentOutlined: 'place',
+  ScheduleOutlined: 'schedule',
   CalendarOutlined: 'event',
   PlayCircleOutlined: 'play_circle',
   HeartOutlined: 'favorite_border',
@@ -60,6 +61,18 @@ const ANT_ICON_TO_MATERIAL: Record<string, string> = {
   BookOutlined: 'menu_book',
 };
 
+/**
+ * Convert an Ant Design icon name to a Material Icons ligature name.
+ * Uses the explicit mapping first, then falls back to stripping the
+ * Outlined/Filled/TwoTone suffix and converting PascalCase to snake_case.
+ */
+function toMaterialIcon(antIcon: string): string {
+  if (ANT_ICON_TO_MATERIAL[antIcon]) return ANT_ICON_TO_MATERIAL[antIcon];
+  // Fallback: strip suffix, convert PascalCase → snake_case
+  const base = antIcon.replace(/(Outlined|Filled|TwoTone)$/, '');
+  return base.replace(/([a-z])([A-Z])/g, '$1_$2').toLowerCase();
+}
+
 interface NavConfigItem {
   id: string;
   label: string;
@@ -415,7 +428,7 @@ class HeaderBuilderService {
           id: item.id,
           label: item.label,
           path: resolvedPath,
-          icon: ANT_ICON_TO_MATERIAL[item.icon] || item.icon,
+          icon: toMaterialIcon(item.icon),
           enabled: true,
           order: item.order,
           type: item.type,