ui(chrome): render sidebar item labels via legacy 'name'

The kit's AdminShell resolves DbMenuItem.translationKey via
next-intl. gscMy's i18n config has a getMessageFallback that
returns the key verbatim when no translation exists, so passing
the legacy human-readable name ("Dashboard", "Profile", …) as
the translationKey makes the sidebar render correctly without
needing new translations.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/(my)/layout.tsx

@@ -20,7 +20,7 @@ function toDbMenuItem(item: LegacySidebarItem, order: number): DbMenuItem {
   return {
     id: String(item.id),
     key: item.key,
-    translationKey: item.key,
+    translationKey: item.name,
     url: item.url,
     icon: item.icon ?? null,
     sortOrder: order,
@@ -30,7 +30,7 @@ function toDbMenuItem(item: LegacySidebarItem, order: number): DbMenuItem {
       item.submenulvl1?.map((c, i) => ({
         id: `${item.id}.${i + 1}`,
         key: c.key,
-        translationKey: c.key,
+        translationKey: c.name,
         url: c.url,
         icon: c.icon ?? null,
         sortOrder: i,