i18n(editor): translate the remaining raw UI strings

The explorer toggle tooltips (Hide/Show file explorer) and the header's
Share-project title were raw English — now keyed and translated in all
nine locales, same common2.json home as the menubar strings.

frontend/src/components/layout/AppHeader.tsx

@@ -260,7 +260,7 @@ export const AppHeader: React.FC<AppHeaderProps> = ({ autoSave, editorMenu, edit
                 color: '#ccc',
                 fontSize: 13,
               }}
-              title="Share project"
+              title={t('header.shareProject', 'Share project')}
             >
               <svg
                 width="14"

frontend/src/i18n/locales/de/common2.json

@@ -383,7 +383,9 @@
       "discord": "Discord-Community",
       "github": "GitHub-Repository",
       "compile": "Kompilieren",
-      "run": "Ausführen"
+      "run": "Ausführen",
+      "hideExplorer": "Datei-Explorer ausblenden",
+      "showExplorer": "Datei-Explorer einblenden"
     }
   },
   "about": {
@@ -461,5 +463,8 @@
       "subtitle": "Keine Anmeldung erforderlich. Läuft zu 100 % in Ihrem Browser. Kostenlos und Open Source.",
       "openEditor": "Editor öffnen"
     }
+  },
+  "header": {
+    "shareProject": "Projekt teilen"
   }
 }

frontend/src/i18n/locales/en/common2.json

@@ -385,7 +385,9 @@
       "discord": "Discord Community",
       "github": "GitHub Repository",
       "compile": "Compile",
-      "run": "Run"
+      "run": "Run",
+      "hideExplorer": "Hide file explorer",
+      "showExplorer": "Show file explorer"
     }
   },
   "about": {
@@ -463,5 +465,8 @@
       "subtitle": "No signup required. Runs 100% in your browser. Free and open source.",
       "openEditor": "Open Editor"
     }
+  },
+  "header": {
+    "shareProject": "Share project"
   }
 }

frontend/src/i18n/locales/es/common2.json

@@ -385,7 +385,9 @@
       "discord": "Comunidad de Discord",
       "github": "Repositorio en GitHub",
       "compile": "Compilar",
-      "run": "Ejecutar"
+      "run": "Ejecutar",
+      "hideExplorer": "Ocultar explorador de archivos",
+      "showExplorer": "Mostrar explorador de archivos"
     }
   },
   "about": {
@@ -463,5 +465,8 @@
       "subtitle": "No requiere registro. Funciona 100% en tu navegador. Gratuito y de código abierto.",
       "openEditor": "Abrir editor"
     }
+  },
+  "header": {
+    "shareProject": "Compartir proyecto"
   }
 }

frontend/src/i18n/locales/fr/common2.json

@@ -383,7 +383,9 @@
       "discord": "Communauté Discord",
       "github": "Dépôt GitHub",
       "compile": "Compiler",
-      "run": "Exécuter"
+      "run": "Exécuter",
+      "hideExplorer": "Masquer l'explorateur de fichiers",
+      "showExplorer": "Afficher l'explorateur de fichiers"
     }
   },
   "about": {
@@ -461,5 +463,8 @@
       "subtitle": "Aucune inscription requise. Fonctionne à 100 % dans votre navigateur. Gratuit et open source.",
       "openEditor": "Ouvrir l'éditeur"
     }
+  },
+  "header": {
+    "shareProject": "Partager le projet"
   }
 }

frontend/src/i18n/locales/it/common2.json

@@ -383,7 +383,9 @@
       "discord": "Community Discord",
       "github": "Repository GitHub",
       "compile": "Compila",
-      "run": "Esegui"
+      "run": "Esegui",
+      "hideExplorer": "Nascondi esplora file",
+      "showExplorer": "Mostra esplora file"
     }
   },
   "about": {
@@ -461,5 +463,8 @@
       "subtitle": "Nessuna registrazione richiesta. Funziona al 100% nel tuo browser. Gratuito e open source.",
       "openEditor": "Apri Editor"
     }
+  },
+  "header": {
+    "shareProject": "Condividi progetto"
   }
 }

frontend/src/i18n/locales/ja/common2.json

@@ -383,7 +383,9 @@
       "discord": "Discord コミュニティ",
       "github": "GitHub リポジトリ",
       "compile": "コンパイル",
-      "run": "実行"
+      "run": "実行",
+      "hideExplorer": "ファイルエクスプローラーを隠す",
+      "showExplorer": "ファイルエクスプローラーを表示"
     }
   },
   "about": {
@@ -461,5 +463,8 @@
       "subtitle": "サインアップ不要。100% ブラウザで動作。無料でオープンソース。",
       "openEditor": "エディタを開く"
     }
+  },
+  "header": {
+    "shareProject": "プロジェクトを共有"
   }
 }

frontend/src/i18n/locales/pt-br/common2.json

@@ -383,7 +383,9 @@
       "discord": "Comunidade no Discord",
       "github": "Repositório no GitHub",
       "compile": "Compilar",
-      "run": "Executar"
+      "run": "Executar",
+      "hideExplorer": "Ocultar explorador de arquivos",
+      "showExplorer": "Mostrar explorador de arquivos"
     }
   },
   "about": {
@@ -461,5 +463,8 @@
       "subtitle": "Sem necessidade de cadastro. Roda 100% no seu navegador. Gratuito e de código aberto.",
       "openEditor": "Abrir Editor"
     }
+  },
+  "header": {
+    "shareProject": "Compartilhar projeto"
   }
 }

frontend/src/i18n/locales/ru/common2.json

@@ -383,7 +383,9 @@
       "discord": "Сообщество в Discord",
       "github": "Репозиторий на GitHub",
       "compile": "Компилировать",
-      "run": "Запустить"
+      "run": "Запустить",
+      "hideExplorer": "Скрыть проводник файлов",
+      "showExplorer": "Показать проводник файлов"
     }
   },
   "about": {
@@ -461,5 +463,8 @@
       "subtitle": "Регистрация не требуется. Работает 100% в вашем браузере. Бесплатно и с открытым исходным кодом.",
       "openEditor": "Открыть редактор"
     }
+  },
+  "header": {
+    "shareProject": "Поделиться проектом"
   }
 }

frontend/src/i18n/locales/zh-cn/common2.json

@@ -383,7 +383,9 @@
       "discord": "Discord 社区",
       "github": "GitHub 仓库",
       "compile": "编译",
-      "run": "运行"
+      "run": "运行",
+      "hideExplorer": "隐藏文件资源管理器",
+      "showExplorer": "显示文件资源管理器"
     }
   },
   "about": {
@@ -461,5 +463,8 @@
       "subtitle": "无需注册。100% 在浏览器中运行。免费且开源。",
       "openEditor": "打开编辑器"
     }
+  },
+  "header": {
+    "shareProject": "分享项目"
   }
 }

frontend/src/pages/EditorPage.tsx

@@ -411,7 +411,7 @@ export const EditorPage: React.FC = () => {
           <button
             className="explorer-toggle-btn unified-toolbar-explorer-toggle"
             onClick={() => setExplorerOpen((v) => !v)}
-            title={explorerOpen ? 'Hide file explorer' : 'Show file explorer'}
+            title={explorerOpen ? t('editor.menu.hideExplorer', 'Hide file explorer') : t('editor.menu.showExplorer', 'Show file explorer')}
           >
             <svg
               width="16"
@@ -624,7 +624,7 @@ export const EditorPage: React.FC = () => {
                 <button
                   className="explorer-toggle-btn"
                   onClick={() => setExplorerOpen((v) => !v)}
-                  title={explorerOpen ? 'Hide file explorer' : 'Show file explorer'}
+                  title={explorerOpen ? t('editor.menu.hideExplorer', 'Hide file explorer') : t('editor.menu.showExplorer', 'Show file explorer')}
                 >
                   <svg
                     width="16"