feat(permissions): add workspace directory management tab

- Add Workspace tab to PermissionsDialog with full directory management UI
  - Directory list view: initial (non-removable) dirs shown inline,
    runtime-added dirs selectable; "Add directory…" always first
  - Add directory input view: filesystem autocomplete with ↑/↓ navigation
    and Tab-to-complete; path validation (existence, type, duplicate,
    subdirectory checks)
  - Remove directory confirmation view
  - Save directly to project settings (SettingScope.Workspace), no scope
    selection step
- Add onTab/onUp/onDown props to TextInput to intercept keys before buffer
- Add removeDirectory() and isInitialDirectory() to WorkspaceContext
- Add --add-dir CLI alias for --include-directories
- Add /add-dir slash command (alias for /directory add)
- Add permissions.additionalDirectories settings field
- Add i18n keys for all workspace directory UI strings (en/zh/de/ja/pt/ru)"

packages/cli/src/config/settingsSchema.ts

@@ -835,6 +835,18 @@ const SETTINGS_SCHEMA = {
         showInDialog: false,
         mergeStrategy: MergeStrategy.UNION,
       },
+      additionalDirectories: {
+        type: 'array',
+        label: 'Additional Directories',
+        category: 'Tools',
+        requiresRestart: false,
+        default: [] as string[],
+        description:
+          'Additional directories to include in the workspace context. ' +
+          'Alias for context.includeDirectories. Files in these directories are treated as workspace files.',
+        showInDialog: false,
+        mergeStrategy: MergeStrategy.CONCAT,
+      },
     },
   },