Clean up i18n: translate 404 page Chinese text and remove placeholder German locale

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cypress/e2e/notFound404.cy.js

@@ -15,13 +15,13 @@ describe('404 Not Found Page', () => {
     loginWithFixtures();
     cy.visit('/this-page-does-not-exist');
     cy.contains('404').should('be.visible');
-    cy.contains('您想找的頁面不存在').should('be.visible');
+    cy.contains('The page you are looking for does not exist.').should('be.visible');
   });
 
   it('has a link back to Files page', () => {
     loginWithFixtures();
     cy.visit('/some/random/path');
-    cy.contains('a', '回到 Files 頁')
+    cy.contains('a', 'Go to Files')
       .should('be.visible')
       .should('have.attr', 'href', '/files');
   });

src/i18n/i18n.js

@@ -17,28 +17,16 @@ import enLocale from './en.json';
 i18next
   .use(LanguageDetector)
   .init({
-    // 配置你的本地化選項
     resources: {
       en: {
         translation: enLocale
       },
-      de: {
-        translation: {
-          greeting: 'Hallo!'
-        }
-      }
-      // 添加其他語言的翻譯
     },
-    // 選擇默認的語言
     fallbackLng: 'en',
-
-    // 在初始化時自動檢測用戶的語言
     detection: {
       order: ['localStorage', 'navigator'],
       caches: ['localStorage']
     },
-
-    // 選擇性配置其他選項...
   });
 
 export default i18next;

src/views/NotFound404.vue

@@ -6,9 +6,9 @@
   <main>
     <div class="container text-center pt-7 pb-12">
       <h2 class="mb-7">404</h2>
-      <p>您想找的頁面不存在</p>
-      <p class="mb-7">請重新確認搜尋的項目或是回到 Files 頁</p>
-      <router-link to="/files" class="btn btn-c-primary btn-lg">回到 Files 頁</router-link>
+      <p>The page you are looking for does not exist.</p>
+      <p class="mb-7">Please check the URL or go back to the Files page.</p>
+      <router-link to="/files" class="btn btn-c-primary btn-lg">Go to Files</router-link>
     </div>
   </main>
 </template>