fix(dashboard): resolve TS build errors in a11y changes

- Fix duplicate className attr in EmojiDialogs.tsx
- Replace animated.div with animated('div') in expression-reviewer and zoomable-chart to fix React 19 children type error
- Fix malformed i18n JSON (a11y namespace was outside root object)

dashboard/src/i18n/locales/en.json

@@ -473,4 +473,5 @@
     "sidebarNav": "Main navigation",
     "closeMenu": "Close menu",
     "navigatedTo": "Navigated to {{page}}"
+  }
 }

dashboard/src/i18n/locales/ja.json

@@ -473,4 +473,5 @@
     "sidebarNav": "メインナビゲーション",
     "closeMenu": "メニューを閉じる",
     "navigatedTo": "{{page}} に移動しました"
+  }
 }

dashboard/src/i18n/locales/ko.json

@@ -473,4 +473,5 @@
     "sidebarNav": "메인 내비게이션",
     "closeMenu": "메뉴 닫기",
     "navigatedTo": "{{page}}으로 이동했습니다"
+  }
 }

dashboard/src/i18n/locales/zh.json

@@ -473,4 +473,5 @@
     "sidebarNav": "主导航",
     "closeMenu": "关闭菜单",
     "navigatedTo": "已导航至 {{page}}"
+  }
 }