diff --git a/packages/client/src/components/hermes/files/FilePreview.vue b/packages/client/src/components/hermes/files/FilePreview.vue
index 3532dc1..bce83df 100644
--- a/packages/client/src/components/hermes/files/FilePreview.vue
+++ b/packages/client/src/components/hermes/files/FilePreview.vue
@@ -1,5 +1,6 @@
 <script setup lang="ts">
-import { NButton } from 'naive-ui'
+import { h } from 'vue'
+import { NButton, NIcon } from 'naive-ui'
 import { useI18n } from 'vue-i18n'
 import { useFilesStore } from '@/stores/hermes/files'
 import { getFileDownloadUrl } from '@/api/hermes/files'
@@ -12,14 +13,24 @@ function getImageUrl(): string {
   if (!filesStore.previewFile) return ''
   return getFileDownloadUrl(filesStore.previewFile.path)
 }
+
+const CloseIcon = () =>
+  h(
+    'svg',
+    { viewBox: '0 0 24 24', width: '14', height: '14', fill: 'currentColor' },
+    [h('path', { d: 'M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z' })],
+  )
 </script>
 
 <template>
   <div class="file-preview" v-if="filesStore.previewFile">
     <div class="preview-header">
       <span class="preview-filename">{{ filesStore.previewFile.path }}</span>
-      <NButton size="small" @click="filesStore.closePreview()">
-        {{ t('common.cancel') }}
+      <NButton size="small" quaternary @click="filesStore.closePreview()">
+        <template #icon>
+          <NIcon><CloseIcon /></NIcon>
+        </template>
+        {{ t('files.closePreview') }}
       </NButton>
     </div>
     <div class="preview-content">
diff --git a/packages/client/src/i18n/locales/de.ts b/packages/client/src/i18n/locales/de.ts
index e24b9c8..a6f6fb4 100644
--- a/packages/client/src/i18n/locales/de.ts
+++ b/packages/client/src/i18n/locales/de.ts
@@ -75,6 +75,7 @@ export default {
     usage: 'Nutzung',
     channels: 'Kanale',
     terminal: 'Terminal',
+    files: 'Dateien',
     settings: 'Einstellungen',
     connected: 'Verbunden',
     disconnected: 'Getrennt',
@@ -84,7 +85,6 @@ export default {
     updateSuccess: 'Aktualisierung abgeschlossen, bitte Server neu starten',
     updateFailed: 'Aktualisierung fehlgeschlagen',
     logout: 'Abmelden',
-    nodeVersionWarning: 'Node.js v{version} erkannt. Version 23+ wird fur volle Funktionalitat benotigt (SQLite, node-pty).',
     changelog: 'Anderungsprotokoll',
     noChangelog: 'Kein Anderungsprotokoll verfugbar',
   },
@@ -511,11 +511,6 @@ export default {
 
   // Anderungsprotokoll
   changelog: {
-    new_0_4_4_1: 'Dateibrowser mit Multi-Backend-Unterstutzung hinzugefugt (local/Docker/SSH/Singularity)',
-    new_0_4_4_2: 'Dateidownload aus Chat-Nachrichtenanhangen hinzugefugt',
-    new_0_4_4_3: 'Live-Badge auf aktiven Chat-Sitzungen hinzugefugt',
-    new_0_4_4_4: 'StepFun- und Nous-Portal-Provider-Unterstutzung hinzugefugt',
-    new_0_4_4_5: 'Spezialzeichen-Suche verursacht 500-Fehler behoben',
     new_0_4_3_1: 'Benutzername/Passwort-Login neben Token-Authentifizierung hinzugefugt',
     new_0_4_3_2: 'Kontoeinstellungen fur Anmeldeinformationen hinzugefugt',
     new_0_4_3_3: 'Abmelden-Schaltflache in der Seitenleiste hinzugefugt',
@@ -527,4 +522,67 @@ export default {
     new_0_4_2_5: 'Eingebaute Provider-Erkennung und Modellabgleich behoben',
     new_0_4_1_1: 'Authentifizierungsumgehung und SPA-Bereitstellung behoben',
   },
+
+  // Dateien
+  files: {
+    title: 'Dateien',
+    tree: 'Verzeichnisbaum',
+    list: 'Dateiliste',
+    breadcrumbRoot: 'Start',
+    newFile: 'Neue Datei',
+    newFolder: 'Neuer Ordner',
+    upload: 'Hochladen',
+    refresh: 'Aktualisieren',
+    open: 'Offnen',
+    edit: 'Bearbeiten',
+    preview: 'Vorschau',
+    download: 'Herunterladen',
+    copyPath: 'Pfad kopieren',
+    rename: 'Umbenennen',
+    delete: 'Loschen',
+    name: 'Name',
+    size: 'Grosse',
+    modified: 'Geandert',
+    actions: 'Aktionen',
+    emptyDir: 'Leeres Verzeichnis',
+    loading: 'Wird geladen...',
+    confirmDelete: 'Mochten Sie "{name}" wirklich loschen?',
+    confirmDeleteDir: 'Mochten Sie das Verzeichnis "{name}" und seinen gesamten Inhalt wirklich loschen?',
+    deleteFailed: 'Loschen fehlgeschlagen',
+    deleted: 'Geloscht',
+    renameTo: 'Umbenennen in',
+    newFileName: 'Dateiname',
+    newFolderName: 'Ordnername',
+    created: 'Erstellt',
+    createFailed: 'Erstellen fehlgeschlagen',
+    renamed: 'Umbenannt',
+    renameFailed: 'Umbenennen fehlgeschlagen',
+    uploadSuccess: '{count} Datei(en) hochgeladen',
+    uploadFailed: 'Hochladen fehlgeschlagen',
+    saveFailed: 'Speichern fehlgeschlagen',
+    saved: 'Gespeichert',
+    unsavedChanges: 'Sie haben ungespeicherte Anderungen. Verwerfen?',
+    pathCopied: 'Pfad kopiert',
+    fileTooLarge: 'Datei zu gross (max. 10 MB)',
+    permissionDenied: 'Geschutzte Datei kann nicht geandert werden',
+    notFound: 'Datei oder Verzeichnis nicht gefunden',
+    backendError: 'Dateioperation fehlgeschlagen',
+    dragDropHint: 'Dateien hierher ziehen, um sie hochzuladen',
+    closeEditor: 'Editor schliessen',
+    closePreview: 'Schliessen',
+    saveFile: 'Speichern',
+  },
+
+  // Download
+  download: {
+    downloading: 'Wird heruntergeladen...',
+    downloadFailed: 'Download fehlgeschlagen',
+    fileNotFound: 'Datei nicht gefunden oder geloscht',
+    fileTooLarge: 'Datei zu gross (Limit uberschritten)',
+    backendError: 'Lesen der Datei fehlgeschlagen, Remote-Umgebung moglicherweise nicht verfugbar',
+    backendTimeout: 'Zeituberschreitung beim Lesen der Datei',
+    unsupportedBackend: 'Aktuelles Terminal-Backend unterstutzt keine Datei-Downloads',
+    invalidPath: 'Ungultiger Dateipfad',
+    download: 'Herunterladen',
+  },
 }
diff --git a/packages/client/src/i18n/locales/en.ts b/packages/client/src/i18n/locales/en.ts
index 97120f7..6f47da0 100644
--- a/packages/client/src/i18n/locales/en.ts
+++ b/packages/client/src/i18n/locales/en.ts
@@ -595,6 +595,7 @@ export default {
     backendError: 'File operation failed',
     dragDropHint: 'Drag files here to upload',
     closeEditor: 'Close Editor',
+    closePreview: 'Close',
     saveFile: 'Save',
   },
   // Download
diff --git a/packages/client/src/i18n/locales/es.ts b/packages/client/src/i18n/locales/es.ts
index 747ec46..9721c81 100644
--- a/packages/client/src/i18n/locales/es.ts
+++ b/packages/client/src/i18n/locales/es.ts
@@ -75,6 +75,7 @@ export default {
     usage: 'Uso',
     channels: 'Canales',
     terminal: 'Terminal',
+    files: 'Archivos',
     settings: 'Configuracion',
     connected: 'Conectado',
     disconnected: 'Desconectado',
@@ -84,7 +85,6 @@ export default {
     updateSuccess: 'Actualizacion completa, por favor reinicia el servidor',
     updateFailed: 'Error al actualizar',
     logout: 'Cerrar sesion',
-    nodeVersionWarning: 'Node.js v{version} detectado. Se requiere la version 23+ para todas las funcionalidades (SQLite, node-pty).',
     changelog: 'Registro de cambios',
     noChangelog: 'No hay registro de cambios',
   },
@@ -511,11 +511,6 @@ export default {
 
   // Registro de cambios
   changelog: {
-    new_0_4_4_1: 'Agregar explorador de archivos con soporte multi-backend (local/Docker/SSH/Singularity)',
-    new_0_4_4_2: 'Agregar descarga de archivos desde archivos adjuntos del chat',
-    new_0_4_4_3: 'Agregar indicador en vivo en sesiones de chat activas',
-    new_0_4_4_4: 'Agregar soporte para proveedores StepFun y Nous Portal',
-    new_0_4_4_5: 'Corregir error 500 al buscar con caracteres especiales',
     new_0_4_3_1: 'Agregar inicio de sesion con usuario/contrasena junto a autenticacion por token',
     new_0_4_3_2: 'Agregar configuracion de cuenta para gestionar credenciales',
     new_0_4_3_3: 'Agregar boton de cerrar sesion en la barra lateral',
@@ -527,4 +522,67 @@ export default {
     new_0_4_2_5: 'Corregir deteccion de proveedores integrados y coincidencia de modelos',
     new_0_4_1_1: 'Corregir bypass de autenticacion y servicio de archivos SPA',
   },
+
+  // Archivos
+  files: {
+    title: 'Archivos',
+    tree: 'Arbol de directorios',
+    list: 'Lista de archivos',
+    breadcrumbRoot: 'Inicio',
+    newFile: 'Nuevo archivo',
+    newFolder: 'Nueva carpeta',
+    upload: 'Subir',
+    refresh: 'Actualizar',
+    open: 'Abrir',
+    edit: 'Editar',
+    preview: 'Vista previa',
+    download: 'Descargar',
+    copyPath: 'Copiar ruta',
+    rename: 'Renombrar',
+    delete: 'Eliminar',
+    name: 'Nombre',
+    size: 'Tamano',
+    modified: 'Modificado',
+    actions: 'Acciones',
+    emptyDir: 'Directorio vacio',
+    loading: 'Cargando...',
+    confirmDelete: '?Seguro que quiere eliminar "{name}"?',
+    confirmDeleteDir: '?Seguro que quiere eliminar el directorio "{name}" y todo su contenido?',
+    deleteFailed: 'Error al eliminar',
+    deleted: 'Eliminado',
+    renameTo: 'Renombrar a',
+    newFileName: 'Nombre del archivo',
+    newFolderName: 'Nombre de la carpeta',
+    created: 'Creado',
+    createFailed: 'Error al crear',
+    renamed: 'Renombrado',
+    renameFailed: 'Error al renombrar',
+    uploadSuccess: '{count} archivo(s) subido(s)',
+    uploadFailed: 'Error al subir',
+    saveFailed: 'Error al guardar',
+    saved: 'Guardado',
+    unsavedChanges: 'Tiene cambios sin guardar. ?Descartar?',
+    pathCopied: 'Ruta copiada',
+    fileTooLarge: 'Archivo demasiado grande (max 10MB)',
+    permissionDenied: 'No se puede modificar un archivo protegido',
+    notFound: 'Archivo o directorio no encontrado',
+    backendError: 'Error en la operacion de archivo',
+    dragDropHint: 'Arrastra archivos aqui para subir',
+    closeEditor: 'Cerrar editor',
+    closePreview: 'Cerrar',
+    saveFile: 'Guardar',
+  },
+
+  // Descarga
+  download: {
+    downloading: 'Descargando...',
+    downloadFailed: 'Error en la descarga',
+    fileNotFound: 'Archivo no encontrado o eliminado',
+    fileTooLarge: 'Archivo demasiado grande (excede el limite)',
+    backendError: 'Error al leer el archivo, el entorno remoto puede no estar disponible',
+    backendTimeout: 'Tiempo de lectura del archivo agotado',
+    unsupportedBackend: 'El backend del terminal actual no admite la descarga de archivos',
+    invalidPath: 'Ruta de archivo invalida',
+    download: 'Descargar',
+  },
 }
diff --git a/packages/client/src/i18n/locales/fr.ts b/packages/client/src/i18n/locales/fr.ts
index 0231f1c..7b300a2 100644
--- a/packages/client/src/i18n/locales/fr.ts
+++ b/packages/client/src/i18n/locales/fr.ts
@@ -75,6 +75,7 @@ export default {
     usage: 'Utilisation',
     channels: 'Canaux',
     terminal: 'Terminal',
+    files: 'Fichiers',
     settings: 'Parametres',
     connected: 'Connecte',
     disconnected: 'Deconnecte',
@@ -84,7 +85,6 @@ export default {
     updateSuccess: 'Mise a jour terminee, veuillez redemarrer le serveur',
     updateFailed: 'Echec de la mise a jour',
     logout: 'Deconnexion',
-    nodeVersionWarning: 'Node.js v{version} detecte. La version 23+ est requise pour toutes les fonctionnalites (SQLite, node-pty).',
     changelog: 'Journal des modifications',
     noChangelog: 'Aucun journal disponible',
   },
@@ -511,11 +511,6 @@ export default {
 
   // Journal des modifications
   changelog: {
-    new_0_4_4_1: 'Ajout du navigateur de fichiers avec support multi-backend (local/Docker/SSH/Singularity)',
-    new_0_4_4_2: 'Ajout du telechargement de fichiers depuis les pieces jointes',
-    new_0_4_4_3: 'Ajout du badge en direct sur les sessions actives',
-    new_0_4_4_4: 'Ajout du support des fournisseurs StepFun et Nous Portal',
-    new_0_4_4_5: 'Correction de l\'erreur 500 lors de la recherche avec caracteres speciaux',
     new_0_4_3_1: 'Ajouter la connexion par nom d\'utilisateur/mot de passe en plus du token',
     new_0_4_3_2: 'Ajouter les parametres de compte pour gerer les identifiants',
     new_0_4_3_3: 'Ajouter le bouton de deconnexion dans la barre laterale',
@@ -527,4 +522,67 @@ export default {
     new_0_4_2_5: 'Corriger la detection des fournisseurs integres et l\'appariement des modeles',
     new_0_4_1_1: 'Corriger le contournement d\'authentification et le service de fichiers SPA',
   },
+
+  // Fichiers
+  files: {
+    title: 'Fichiers',
+    tree: 'Arborescence',
+    list: 'Liste des fichiers',
+    breadcrumbRoot: 'Accueil',
+    newFile: 'Nouveau fichier',
+    newFolder: 'Nouveau dossier',
+    upload: 'Telecharger',
+    refresh: 'Actualiser',
+    open: 'Ouvrir',
+    edit: 'Modifier',
+    preview: 'Apercu',
+    download: 'Telecharger',
+    copyPath: 'Copier le chemin',
+    rename: 'Renommer',
+    delete: 'Supprimer',
+    name: 'Nom',
+    size: 'Taille',
+    modified: 'Modifie',
+    actions: 'Actions',
+    emptyDir: 'Dossier vide',
+    loading: 'Chargement...',
+    confirmDelete: 'Voulez-vous vraiment supprimer "{name}" ?',
+    confirmDeleteDir: 'Voulez-vous vraiment supprimer le dossier "{name}" et tout son contenu ?',
+    deleteFailed: 'Echec de la suppression',
+    deleted: 'Supprime',
+    renameTo: 'Renommer en',
+    newFileName: 'Nom du fichier',
+    newFolderName: 'Nom du dossier',
+    created: 'Cree',
+    createFailed: 'Echec de la creation',
+    renamed: 'Renomme',
+    renameFailed: 'Echec du renommage',
+    uploadSuccess: '{count} fichier(s) televerse(s)',
+    uploadFailed: 'Echec du televersement',
+    saveFailed: 'Echec de l\'enregistrement',
+    saved: 'Enregistre',
+    unsavedChanges: 'Vous avez des modifications non enregistrees. Annuler ?',
+    pathCopied: 'Chemin copie',
+    fileTooLarge: 'Fichier trop volumineux (max 10 Mo)',
+    permissionDenied: 'Impossible de modifier un fichier protege',
+    notFound: 'Fichier ou dossier introuvable',
+    backendError: 'Echec de l\'operation sur le fichier',
+    dragDropHint: 'Glissez des fichiers ici pour les televerser',
+    closeEditor: 'Fermer l\'editeur',
+    closePreview: 'Fermer',
+    saveFile: 'Enregistrer',
+  },
+
+  // Telechargement
+  download: {
+    downloading: 'Telechargement...',
+    downloadFailed: 'Echec du telechargement',
+    fileNotFound: 'Fichier introuvable ou supprime',
+    fileTooLarge: 'Fichier trop volumineux (limite depassee)',
+    backendError: 'Echec de la lecture du fichier, l\'environnement distant est peut-etre indisponible',
+    backendTimeout: 'Delai de lecture du fichier depasse',
+    unsupportedBackend: 'Le backend de terminal actuel ne prend pas en charge le telechargement de fichiers',
+    invalidPath: 'Chemin de fichier invalide',
+    download: 'Telecharger',
+  },
 }
diff --git a/packages/client/src/i18n/locales/ja.ts b/packages/client/src/i18n/locales/ja.ts
index 1f436ee..5acd0d2 100644
--- a/packages/client/src/i18n/locales/ja.ts
+++ b/packages/client/src/i18n/locales/ja.ts
@@ -75,6 +75,7 @@ export default {
     usage: '使用量',
     channels: 'チャンネル',
     terminal: 'ターミナル',
+    files: 'ファイル',
     settings: '設定',
     connected: '接続済み',
     disconnected: '未接続',
@@ -84,7 +85,6 @@ export default {
     updateSuccess: '更新が完了しました。サーバーを再起動してください',
     updateFailed: '更新に失敗しました',
     logout: 'ログアウト',
-    nodeVersionWarning: 'Node.js v{version} が検出されました。全機能にはバージョン23+が必要です（SQLite、node-pty）。',
     changelog: '更新履歴',
     noChangelog: '更新履歴はありません',
   },
@@ -511,11 +511,6 @@ export default {
 
   // 更新履歴
   changelog: {
-    new_0_4_4_1: 'ファイルブラウザを追加（local/Docker/SSH/Singularity対応）',
-    new_0_4_4_2: 'チャットメッセージの添付ファイルダウンロードを追加',
-    new_0_4_4_3: 'アクティブセッションにライブバッジを表示',
-    new_0_4_4_4: 'StepFunとNous Portalプロバイダーに対応',
-    new_0_4_4_5: '特殊文字検索で500エラーになる問題を修正',
     new_0_4_3_1: 'トークン認証に加えてユーザー名/パスワードログインを追加',
     new_0_4_3_2: '資格情報管理のためのアカウント設定を追加',
     new_0_4_3_3: 'サイドバーにログアウトボタンを追加',
@@ -527,4 +522,67 @@ export default {
     new_0_4_2_5: '組み込みプロバイダー検出とモデルマッチングを修正',
     new_0_4_1_1: '認証バイパスとSPAファイル配信を修正',
   },
+
+  // ファイル
+  files: {
+    title: 'ファイル',
+    tree: 'ディレクトリツリー',
+    list: 'ファイル一覧',
+    breadcrumbRoot: 'ホーム',
+    newFile: '新規ファイル',
+    newFolder: '新規フォルダ',
+    upload: 'アップロード',
+    refresh: '更新',
+    open: '開く',
+    edit: '編集',
+    preview: 'プレビュー',
+    download: 'ダウンロード',
+    copyPath: 'パスをコピー',
+    rename: '名前の変更',
+    delete: '削除',
+    name: '名前',
+    size: 'サイズ',
+    modified: '更新日時',
+    actions: '操作',
+    emptyDir: '空のディレクトリ',
+    loading: '読み込み中...',
+    confirmDelete: '「{name}」を削除してもよろしいですか？',
+    confirmDeleteDir: 'ディレクトリ「{name}」とそのすべての内容を削除してもよろしいですか？',
+    deleteFailed: '削除に失敗しました',
+    deleted: '削除しました',
+    renameTo: '名前を変更',
+    newFileName: 'ファイル名',
+    newFolderName: 'フォルダ名',
+    created: '作成しました',
+    createFailed: '作成に失敗しました',
+    renamed: '名前を変更しました',
+    renameFailed: '名前の変更に失敗しました',
+    uploadSuccess: '{count} 個のファイルをアップロードしました',
+    uploadFailed: 'アップロードに失敗しました',
+    saveFailed: '保存に失敗しました',
+    saved: '保存しました',
+    unsavedChanges: '未保存の変更があります。破棄しますか？',
+    pathCopied: 'パスをコピーしました',
+    fileTooLarge: 'ファイルが大きすぎます（最大10MB）',
+    permissionDenied: '保護されたファイルは変更できません',
+    notFound: 'ファイルまたはディレクトリが見つかりません',
+    backendError: 'ファイル操作に失敗しました',
+    dragDropHint: 'ここにファイルをドラッグしてアップロード',
+    closeEditor: 'エディタを閉じる',
+    closePreview: '閉じる',
+    saveFile: '保存',
+  },
+
+  // ダウンロード
+  download: {
+    downloading: 'ダウンロード中...',
+    downloadFailed: 'ダウンロードに失敗しました',
+    fileNotFound: 'ファイルが見つからないか削除されています',
+    fileTooLarge: 'ファイルが大きすぎます（制限超過）',
+    backendError: 'ファイルの読み取りに失敗しました。リモート環境が利用できない可能性があります',
+    backendTimeout: 'ファイルの読み取りがタイムアウトしました',
+    unsupportedBackend: '現在のターミナルバックエンドはファイルのダウンロードに対応していません',
+    invalidPath: '無効なファイルパス',
+    download: 'ダウンロード',
+  },
 }
diff --git a/packages/client/src/i18n/locales/ko.ts b/packages/client/src/i18n/locales/ko.ts
index d595d43..440e8b8 100644
--- a/packages/client/src/i18n/locales/ko.ts
+++ b/packages/client/src/i18n/locales/ko.ts
@@ -75,6 +75,7 @@ export default {
     usage: '사용량',
     channels: '채널',
     terminal: '터미널',
+    files: '파일',
     settings: '설정',
     connected: '연결됨',
     disconnected: '연결 끊김',
@@ -84,7 +85,6 @@ export default {
     updateSuccess: '업데이트 완료, 서버를 재시작해 주세요',
     updateFailed: '업데이트 실패',
     logout: '로그아웃',
-    nodeVersionWarning: 'Node.js v{version}이(가) 감지되었습니다. 전체 기능에는 버전 23+가 필요합니다(SQLite, node-pty).',
     changelog: '변경 이력',
     noChangelog: '변경 이력이 없습니다',
   },
@@ -511,11 +511,6 @@ export default {
 
   // 변경 이력
   changelog: {
-    new_0_4_4_1: '파일 브라우저 추가 (local/Docker/SSH/Singularity 지원)',
-    new_0_4_4_2: '채팅 메시지 첨부 파일 다운로드 추가',
-    new_0_4_4_3: '활성 세션에 라이브 배지 표시',
-    new_0_4_4_4: 'StepFun 및 Nous Portal 프로바이더 지원 추가',
-    new_0_4_4_5: '특수문자 검색 시 500 에러 수정',
     new_0_4_3_1: '토큰 인증과 함께 사용자 이름/비밀번호 로그인 추가',
     new_0_4_3_2: '자격 증명 관리를 위한 계정 설정 추가',
     new_0_4_3_3: '사이드바에 로그아웃 버튼 추가',
@@ -527,4 +522,67 @@ export default {
     new_0_4_2_5: '내장 프로바이더 감지 및 모델 매칭 수정',
     new_0_4_1_1: '인증 우회 및 SPA 파일 서비스 수정',
   },
+
+  // 파일
+  files: {
+    title: '파일',
+    tree: '디렉터리 트리',
+    list: '파일 목록',
+    breadcrumbRoot: '홈',
+    newFile: '새 파일',
+    newFolder: '새 폴더',
+    upload: '업로드',
+    refresh: '새로고침',
+    open: '열기',
+    edit: '편집',
+    preview: '미리보기',
+    download: '다운로드',
+    copyPath: '경로 복사',
+    rename: '이름 변경',
+    delete: '삭제',
+    name: '이름',
+    size: '크기',
+    modified: '수정일',
+    actions: '작업',
+    emptyDir: '빈 디렉터리',
+    loading: '불러오는 중...',
+    confirmDelete: '"{name}"을(를) 삭제하시겠습니까?',
+    confirmDeleteDir: '디렉터리 "{name}"과 그 내부 항목을 모두 삭제하시겠습니까?',
+    deleteFailed: '삭제 실패',
+    deleted: '삭제됨',
+    renameTo: '새 이름',
+    newFileName: '파일 이름',
+    newFolderName: '폴더 이름',
+    created: '생성됨',
+    createFailed: '생성 실패',
+    renamed: '이름이 변경됨',
+    renameFailed: '이름 변경 실패',
+    uploadSuccess: '{count}개 파일이 업로드되었습니다',
+    uploadFailed: '업로드 실패',
+    saveFailed: '저장 실패',
+    saved: '저장됨',
+    unsavedChanges: '저장하지 않은 변경 사항이 있습니다. 취소하시겠습니까?',
+    pathCopied: '경로가 복사되었습니다',
+    fileTooLarge: '파일이 너무 큽니다 (최대 10MB)',
+    permissionDenied: '보호된 파일은 수정할 수 없습니다',
+    notFound: '파일 또는 디렉터리를 찾을 수 없습니다',
+    backendError: '파일 작업 실패',
+    dragDropHint: '여기로 파일을 드래그하여 업로드',
+    closeEditor: '편집기 닫기',
+    closePreview: '닫기',
+    saveFile: '저장',
+  },
+
+  // 다운로드
+  download: {
+    downloading: '다운로드 중...',
+    downloadFailed: '다운로드 실패',
+    fileNotFound: '파일을 찾을 수 없거나 삭제되었습니다',
+    fileTooLarge: '파일이 너무 큽니다 (제한 초과)',
+    backendError: '파일 읽기에 실패했습니다. 원격 환경이 사용 불가능할 수 있습니다',
+    backendTimeout: '파일 읽기 시간 초과',
+    unsupportedBackend: '현재 터미널 백엔드는 파일 다운로드를 지원하지 않습니다',
+    invalidPath: '잘못된 파일 경로',
+    download: '다운로드',
+  },
 }
diff --git a/packages/client/src/i18n/locales/pt.ts b/packages/client/src/i18n/locales/pt.ts
index 55d2311..a83424b 100644
--- a/packages/client/src/i18n/locales/pt.ts
+++ b/packages/client/src/i18n/locales/pt.ts
@@ -75,6 +75,7 @@ export default {
     usage: 'Uso',
     channels: 'Canais',
     terminal: 'Terminal',
+    files: 'Arquivos',
     settings: 'Configuracoes',
     connected: 'Conectado',
     disconnected: 'Desconectado',
@@ -84,7 +85,6 @@ export default {
     updateSuccess: 'Atualizacao concluida, por favor reinicie o servidor',
     updateFailed: 'Falha na atualizacao',
     logout: 'Sair',
-    nodeVersionWarning: 'Node.js v{version} detectado. A versao 23+ e necessaria para todas as funcionalidades (SQLite, node-pty).',
     changelog: 'Registro de alteracoes',
     noChangelog: 'Nenhum registro disponivel',
   },
@@ -511,11 +511,6 @@ export default {
 
   // Registro de alteracoes
   changelog: {
-    new_0_4_4_1: 'Adicionar navegador de arquivos com suporte multi-backend (local/Docker/SSH/Singularity)',
-    new_0_4_4_2: 'Adicionar download de arquivos dos anexos de chat',
-    new_0_4_4_3: 'Adicionar indicador ao vivo nas sessoes de chat ativas',
-    new_0_4_4_4: 'Adicionar suporte para provedores StepFun e Nous Portal',
-    new_0_4_4_5: 'Corrigir erro 500 ao pesquisar com caracteres especiais',
     new_0_4_3_1: 'Adicionar login por usuario/senha junto com autenticacao por token',
     new_0_4_3_2: 'Adicionar configuracoes de conta para gerenciar credenciais',
     new_0_4_3_3: 'Adicionar botao de sair na barra lateral',
@@ -527,4 +522,67 @@ export default {
     new_0_4_2_5: 'Corrigir deteccao de provedores integrados e combinacao de modelos',
     new_0_4_1_1: 'Corrigir bypass de autenticacao e servico de arquivos SPA',
   },
+
+  // Arquivos
+  files: {
+    title: 'Arquivos',
+    tree: 'Arvore de diretorios',
+    list: 'Lista de arquivos',
+    breadcrumbRoot: 'Inicio',
+    newFile: 'Novo arquivo',
+    newFolder: 'Nova pasta',
+    upload: 'Enviar',
+    refresh: 'Atualizar',
+    open: 'Abrir',
+    edit: 'Editar',
+    preview: 'Visualizar',
+    download: 'Baixar',
+    copyPath: 'Copiar caminho',
+    rename: 'Renomear',
+    delete: 'Excluir',
+    name: 'Nome',
+    size: 'Tamanho',
+    modified: 'Modificado',
+    actions: 'Acoes',
+    emptyDir: 'Diretorio vazio',
+    loading: 'Carregando...',
+    confirmDelete: 'Tem certeza de que deseja excluir "{name}"?',
+    confirmDeleteDir: 'Tem certeza de que deseja excluir o diretorio "{name}" e todo o seu conteudo?',
+    deleteFailed: 'Falha ao excluir',
+    deleted: 'Excluido',
+    renameTo: 'Renomear para',
+    newFileName: 'Nome do arquivo',
+    newFolderName: 'Nome da pasta',
+    created: 'Criado',
+    createFailed: 'Falha ao criar',
+    renamed: 'Renomeado',
+    renameFailed: 'Falha ao renomear',
+    uploadSuccess: '{count} arquivo(s) enviado(s)',
+    uploadFailed: 'Falha ao enviar',
+    saveFailed: 'Falha ao salvar',
+    saved: 'Salvo',
+    unsavedChanges: 'Voce tem alteracoes nao salvas. Descartar?',
+    pathCopied: 'Caminho copiado',
+    fileTooLarge: 'Arquivo muito grande (max 10MB)',
+    permissionDenied: 'Nao e possivel modificar arquivo protegido',
+    notFound: 'Arquivo ou diretorio nao encontrado',
+    backendError: 'Falha na operacao de arquivo',
+    dragDropHint: 'Arraste arquivos aqui para enviar',
+    closeEditor: 'Fechar editor',
+    closePreview: 'Fechar',
+    saveFile: 'Salvar',
+  },
+
+  // Download
+  download: {
+    downloading: 'Baixando...',
+    downloadFailed: 'Falha no download',
+    fileNotFound: 'Arquivo nao encontrado ou excluido',
+    fileTooLarge: 'Arquivo muito grande (limite excedido)',
+    backendError: 'Falha ao ler o arquivo, o ambiente remoto pode estar indisponivel',
+    backendTimeout: 'Tempo esgotado para ler o arquivo',
+    unsupportedBackend: 'O backend de terminal atual nao suporta download de arquivos',
+    invalidPath: 'Caminho de arquivo invalido',
+    download: 'Baixar',
+  },
 }
diff --git a/packages/client/src/i18n/locales/zh.ts b/packages/client/src/i18n/locales/zh.ts
index 5ef7226..d1ea8bc 100644
--- a/packages/client/src/i18n/locales/zh.ts
+++ b/packages/client/src/i18n/locales/zh.ts
@@ -598,6 +598,7 @@ export default {
     backendError: '文件操作失败',
     dragDropHint: '拖拽文件到此处上传',
     closeEditor: '关闭编辑器',
+    closePreview: '关闭',
     saveFile: '保存',
   },
   // 下载
diff --git a/packages/client/src/stores/hermes/files.ts b/packages/client/src/stores/hermes/files.ts
index 61b86cc..b6bb0a2 100644
--- a/packages/client/src/stores/hermes/files.ts
+++ b/packages/client/src/stores/hermes/files.ts
@@ -63,6 +63,15 @@ export function isTextFile(name: string): boolean {
   return !binaryExts.has(getFileExt(name))
 }
 
+// Returns true if `targetPath` is the same as `changedPath` or lives inside it
+// when `changedIsDir` is true. Used to invalidate preview/editor state when
+// the underlying file is deleted or renamed.
+function isAffected(targetPath: string, changedPath: string, changedIsDir: boolean): boolean {
+  if (targetPath === changedPath) return true
+  if (changedIsDir && targetPath.startsWith(changedPath + '/')) return true
+  return false
+}
+
 export const useFilesStore = defineStore('files', () => {
   const currentPath = ref('')
   const entries = ref<FileEntry[]>([])
@@ -104,6 +113,12 @@ export const useFilesStore = defineStore('files', () => {
   })
 
   async function fetchEntries(path?: string) {
+    if (path !== undefined && path !== currentPath.value) {
+      // Switching directory invalidates the current preview; close it so the
+      // file list becomes visible again. The editor has its own dirty-check
+      // (see hasUnsavedChanges), so we leave editingFile alone here.
+      previewFile.value = null
+    }
     if (path !== undefined) currentPath.value = path
     loading.value = true
     try {
@@ -167,6 +182,12 @@ export const useFilesStore = defineStore('files', () => {
 
   async function deleteEntry(entry: FileEntry) {
     await filesApi.deleteFile(entry.path, entry.isDir)
+    if (previewFile.value && isAffected(previewFile.value.path, entry.path, entry.isDir)) {
+      previewFile.value = null
+    }
+    if (editingFile.value && isAffected(editingFile.value.path, entry.path, entry.isDir)) {
+      editingFile.value = null
+    }
     await fetchEntries()
   }
 
@@ -174,6 +195,12 @@ export const useFilesStore = defineStore('files', () => {
     const parentPath = entry.path.includes('/') ? entry.path.slice(0, entry.path.lastIndexOf('/')) : ''
     const newPath = parentPath ? `${parentPath}/${newName}` : newName
     await filesApi.renameFile(entry.path, newPath)
+    if (previewFile.value && isAffected(previewFile.value.path, entry.path, entry.isDir)) {
+      previewFile.value = null
+    }
+    if (editingFile.value && isAffected(editingFile.value.path, entry.path, entry.isDir)) {
+      editingFile.value = null
+    }
     await fetchEntries()
   }