refactor(settings): always-docked editor toolbar; reorder Navigation

The 'Always show editor toolbar' preference is gone — the docked
toolbar under the file tabs is now the only mode, and the floating
hover toolbar branch in the files editor (with its open-state and
outside-click machinery) is deleted. The stored preference is dropped
by a store migration and removed from desktop settings persistence,
settings search and every locale.

Navigation section order now reads: file editor keymap, auto-save,
terminal shell + login shell, Terminal Quick Keys, and the Session
tabs group last.

packages/ui/src/lib/desktop.ts

@@ -179,7 +179,6 @@ export type DesktopSettings = {
   collapsibleUserMessages?: boolean;
   stickyUserHeader?: boolean;
   promptNavigatorEnabled?: boolean;
-  expandedEditorToolbar?: boolean;
   wideChatLayoutEnabled?: boolean;
   showSplitAssistantMessageActions?: boolean;
   fontSize?: number;

packages/ui/src/lib/i18n/messages/de.settings.ts

@@ -1953,8 +1953,6 @@ export const settingsDict = {
   'settings.openchamber.visual.field.stickyUserHeader': 'Fixierter Benutzerkopf',
   'settings.openchamber.visual.field.promptNavigatorEnabledAria': 'Prompt-Navigator',
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'Prompt-Navigator',
-  'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Editor-Werkzeugleiste immer anzeigen',
-  'settings.openchamber.visual.field.expandedEditorToolbar': 'Editor-Werkzeugleiste immer anzeigen (unter den Datei-Reitern angeheftet)',
   'settings.openchamber.visual.field.wideChatLayoutAria': 'Breites Chat-Layout',
   'settings.openchamber.visual.field.wideChatLayout': 'Breites Chat-Layout',
   'settings.openchamber.visual.field.codeBlockLineWrapAria': 'Codeblock-Zeilen umbrechen',

packages/ui/src/lib/i18n/messages/en.settings.ts

@@ -2031,8 +2031,6 @@ export const settingsDict = {
   'settings.openchamber.visual.field.stickyUserHeader': 'Sticky User Header',
   'settings.openchamber.visual.field.promptNavigatorEnabledAria': 'Prompt navigator',
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'Prompt Navigator',
-  'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
-  'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
   'settings.openchamber.visual.field.autoSaveEnabledAria': 'Auto-save files',
   'settings.openchamber.visual.field.autoSaveEnabled': 'Auto-save files',
   'settings.openchamber.visual.field.autoSaveEnabledInfo': 'Automatically save file edits after you stop typing. Disable to require manual save.',

packages/ui/src/lib/i18n/messages/es.settings.ts

@@ -2008,8 +2008,6 @@ export const settingsDict = {
   "settings.openchamber.visual.field.stickyUserHeader": "Encabezado de usuario fijo",
   "settings.openchamber.visual.field.promptNavigatorEnabledAria": "Navegador de prompts",
   "settings.openchamber.visual.field.promptNavigatorEnabled": "Navegador de prompts",
-  "settings.openchamber.visual.field.expandedEditorToolbarAria": "Mostrar siempre la barra de herramientas del editor",
-  "settings.openchamber.visual.field.expandedEditorToolbar": "Mostrar siempre la barra de herramientas del editor (anclada bajo las pestañas)",
   "settings.openchamber.visual.field.autoSaveEnabledAria": "Guardado automático de archivos",
   "settings.openchamber.visual.field.autoSaveEnabled": "Guardado automático de archivos",
   "settings.openchamber.visual.field.autoSaveEnabledInfo": "Guarda automáticamente las ediciones del archivo después de dejar de escribir. Desactívalo para exigir un guardado manual.",

packages/ui/src/lib/i18n/messages/fr.settings.ts

@@ -1915,8 +1915,6 @@ export const settingsDict = {
   'settings.openchamber.visual.field.stickyUserHeader': 'En-tête utilisateur collant',
   'settings.openchamber.visual.field.promptNavigatorEnabledAria': 'Navigateur de prompts',
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'Navigateur de prompts',
-  'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Toujours afficher la barre d’outils de l’éditeur',
-  'settings.openchamber.visual.field.expandedEditorToolbar': 'Toujours afficher la barre d’outils de l’éditeur (ancrée sous les onglets de fichiers)',
   'settings.openchamber.visual.field.autoSaveEnabledAria': 'Enregistrement automatique des fichiers',
   'settings.openchamber.visual.field.autoSaveEnabled': 'Enregistrement automatique des fichiers',
   'settings.openchamber.visual.field.autoSaveEnabledInfo': 'Enregistre automatiquement les modifications après l’arrêt de la saisie. Désactivez pour exiger un enregistrement manuel.',

packages/ui/src/lib/i18n/messages/ja.settings.ts

@@ -2041,8 +2041,6 @@ export const settingsDict = {
   'settings.openchamber.visual.field.stickyUserHeader': 'ユーザーヘッダー固定',
   'settings.openchamber.visual.field.promptNavigatorEnabledAria': 'プロンプトナビゲーター',
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'プロンプトナビゲーター',
-  'settings.openchamber.visual.field.expandedEditorToolbarAria': 'エディターツールバーを常に表示',
-  'settings.openchamber.visual.field.expandedEditorToolbar': 'エディターツールバーを常に表示（ファイルタブの下にドッキング）',
   'settings.openchamber.visual.field.autoSaveEnabledAria': 'ファイルの自動保存',
   'settings.openchamber.visual.field.autoSaveEnabled': 'ファイルの自動保存',
   'settings.openchamber.visual.field.autoSaveEnabledInfo': '入力を止めた後にファイルの編集内容を自動保存します。無効にすると手動保存が必要になります。',

packages/ui/src/lib/i18n/messages/ko.settings.ts

@@ -2008,8 +2008,6 @@ export const settingsDict = {
   'settings.openchamber.visual.field.stickyUserHeader': '고정 사용자 헤더',
   'settings.openchamber.visual.field.promptNavigatorEnabledAria': '프롬프트 탐색기',
   'settings.openchamber.visual.field.promptNavigatorEnabled': '프롬프트 탐색기',
-  'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
-  'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
   'settings.openchamber.visual.field.autoSaveEnabledAria': '파일 자동 저장',
   'settings.openchamber.visual.field.autoSaveEnabled': '파일 자동 저장',
   'settings.openchamber.visual.field.autoSaveEnabledInfo': '입력을 멈춘 후 파일 편집 내용을 자동으로 저장합니다. 끄면 수동으로 저장해야 합니다.',

packages/ui/src/lib/i18n/messages/pl.settings.ts

@@ -1111,8 +1111,6 @@ export const settingsDict = {
   'settings.openchamber.visual.field.stickyUserHeaderAria': 'Przyklejony nagłówek użytkownika',
   'settings.openchamber.visual.field.promptNavigatorEnabledAria': 'Nawigator promptów',
   'settings.openchamber.visual.field.promptNavigatorEnabled': 'Nawigator promptów',
-  'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
-  'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
   'settings.openchamber.visual.field.autoSaveEnabledAria': 'Autozapis plików',
   'settings.openchamber.visual.field.autoSaveEnabled': 'Autozapis plików',
   'settings.openchamber.visual.field.autoSaveEnabledInfo': 'Automatycznie zapisuje edycje pliku po zatrzymaniu pisania. Wyłącz, aby wymagać ręcznego zapisu.',

packages/ui/src/lib/i18n/messages/pt-BR.settings.ts

@@ -2008,8 +2008,6 @@ export const settingsDict = {
   "settings.openchamber.visual.field.stickyUserHeader": "Cabeçalho do usuário fixo",
   "settings.openchamber.visual.field.promptNavigatorEnabledAria": "Navegador de prompts",
   "settings.openchamber.visual.field.promptNavigatorEnabled": "Navegador de prompts",
-  "settings.openchamber.visual.field.expandedEditorToolbarAria": "Mostrar sempre a barra de ferramentas do editor",
-  "settings.openchamber.visual.field.expandedEditorToolbar": "Mostrar sempre a barra de ferramentas do editor (ancorada sob as abas)",
   "settings.openchamber.visual.field.autoSaveEnabledAria": "Salvamento automático de arquivos",
   "settings.openchamber.visual.field.autoSaveEnabled": "Salvamento automático de arquivos",
   "settings.openchamber.visual.field.autoSaveEnabledInfo": "Salva automaticamente as edições do arquivo depois que você parar de digitar. Desative para exigir salvamento manual.",

packages/ui/src/lib/i18n/messages/uk.settings.ts

@@ -2008,8 +2008,6 @@ export const settingsDict = {
   "settings.openchamber.visual.field.stickyUserHeader": "Закріплений заголовок користувача",
   "settings.openchamber.visual.field.promptNavigatorEnabledAria": "Навігатор промптів",
   "settings.openchamber.visual.field.promptNavigatorEnabled": "Навігатор промптів",
-  "settings.openchamber.visual.field.expandedEditorToolbarAria": "Завжди показувати панель інструментів редактора",
-  "settings.openchamber.visual.field.expandedEditorToolbar": "Завжди показувати панель інструментів редактора (закріплена під вкладками)",
   "settings.openchamber.visual.field.autoSaveEnabledAria": "Автозбереження файлів",
   "settings.openchamber.visual.field.autoSaveEnabled": "Автозбереження файлів",
   "settings.openchamber.visual.field.autoSaveEnabledInfo": "Автоматично зберігати зміни у файлі після того, як ви припините друкувати. Вимкніть, щоб зберігати лише вручну.",

packages/ui/src/lib/i18n/messages/zh-CN.settings.ts

@@ -2008,8 +2008,6 @@ export const settingsDict = {
   'settings.openchamber.visual.field.stickyUserHeader': '固定用户消息头',
   'settings.openchamber.visual.field.promptNavigatorEnabledAria': '提示词导航',
   'settings.openchamber.visual.field.promptNavigatorEnabled': '提示词导航',
-  'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
-  'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
   'settings.openchamber.visual.field.autoSaveEnabledAria': '自动保存文件',
   'settings.openchamber.visual.field.autoSaveEnabled': '自动保存文件',
   'settings.openchamber.visual.field.autoSaveEnabledInfo': '停止输入后自动保存文件编辑内容。关闭后需手动保存。',

packages/ui/src/lib/i18n/messages/zh-TW.settings.ts

@@ -1915,8 +1915,6 @@ export const settingsDict = {
   'settings.openchamber.visual.field.stickyUserHeader': '固定使用者訊息標頭',
   'settings.openchamber.visual.field.promptNavigatorEnabledAria': '提示詞導覽',
   'settings.openchamber.visual.field.promptNavigatorEnabled': '提示詞導覽',
-  'settings.openchamber.visual.field.expandedEditorToolbarAria': 'Always show editor toolbar',
-  'settings.openchamber.visual.field.expandedEditorToolbar': 'Always show editor toolbar (docked under the file tabs)',
   'settings.openchamber.visual.field.autoSaveEnabledAria': '自動儲存檔案',
   'settings.openchamber.visual.field.autoSaveEnabled': '自動儲存檔案',
   'settings.openchamber.visual.field.autoSaveEnabledInfo': '停止輸入後自動儲存檔案編輯內容。關閉後需手動儲存。',

packages/ui/src/lib/persistence.ts

@@ -578,7 +578,6 @@ const materializeAuthoritativeUiSettings = (settings: DesktopSettings): DesktopS
     messageStreamTransport: 'auto',
     stickyUserHeader: defaults.stickyUserHeader,
     promptNavigatorEnabled: defaults.promptNavigatorEnabled,
-    expandedEditorToolbar: defaults.expandedEditorToolbar,
     wideChatLayoutEnabled: defaults.wideChatLayoutEnabled,
     showSplitAssistantMessageActions: defaults.showSplitAssistantMessageActions,
     draftStartersVisible: defaults.draftStartersVisible,
@@ -842,9 +841,6 @@ const applyDesktopUiPreferences = (settings: DesktopSettings) => {
   if (typeof settings.promptNavigatorEnabled === 'boolean' && settings.promptNavigatorEnabled !== store.promptNavigatorEnabled) {
     store.setPromptNavigatorEnabled(settings.promptNavigatorEnabled);
   }
-  if (typeof settings.expandedEditorToolbar === 'boolean' && settings.expandedEditorToolbar !== store.expandedEditorToolbar) {
-    store.setExpandedEditorToolbar(settings.expandedEditorToolbar);
-  }
   if (typeof settings.wideChatLayoutEnabled === 'boolean' && settings.wideChatLayoutEnabled !== store.wideChatLayoutEnabled) {
     store.setWideChatLayoutEnabled(settings.wideChatLayoutEnabled);
   }
@@ -1511,9 +1507,6 @@ const sanitizeWebSettings = (payload: unknown): DesktopSettings | null => {
   if (typeof candidate.promptNavigatorEnabled === 'boolean') {
     result.promptNavigatorEnabled = candidate.promptNavigatorEnabled;
   }
-  if (typeof candidate.expandedEditorToolbar === 'boolean') {
-    result.expandedEditorToolbar = candidate.expandedEditorToolbar;
-  }
   if (typeof candidate.wideChatLayoutEnabled === 'boolean') {
     result.wideChatLayoutEnabled = candidate.wideChatLayoutEnabled;
   }

packages/ui/src/lib/settings/search.ts

@@ -148,13 +148,6 @@ const SETTINGS_SEARCH_ITEMS: readonly SettingsSearchItem[] = [
     descriptionKey: 'settings.openchamber.visual.field.autoSaveEnabledInfo',
     keywords: ['editor', 'autosave', 'auto-save', 'files', 'save'],
   },
-  {
-    id: 'appearance.expanded-editor-toolbar',
-    page: 'general',
-    titleKey: 'settings.openchamber.visual.field.expandedEditorToolbar',
-    keywords: ['editor', 'toolbar', 'tabs', 'docked', 'files'],
-    isAvailable: (ctx) => !ctx.isVSCode,
-  },
   {
     id: 'appearance.file-editor-keymap',
     page: 'general',