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/ui/components/shared/TextInput.tsx

@@ -21,6 +21,12 @@ export interface TextInputProps {
   value: string;
   onChange: (text: string) => void;
   onSubmit?: () => void;
+  /** Called when Tab is pressed; if provided, prevents the default tab-insertion behaviour. */
+  onTab?: () => void;
+  /** Called when ↑ is pressed; if provided, prevents cursor-up in the buffer. */
+  onUp?: () => void;
+  /** Called when ↓ is pressed; if provided, prevents cursor-down in the buffer. */
+  onDown?: () => void;
   placeholder?: string;
   height?: number; // lines in viewport; >1 enables multiline
   isActive?: boolean; // when false, ignore keypresses
@@ -32,6 +38,9 @@ export function TextInput({
   value,
   onChange,
   onSubmit,
+  onTab,
+  onUp,
+  onDown,
   placeholder,
   height = 1,
   isActive = true,
@@ -65,6 +74,22 @@ export function TextInput({
     (key: Key) => {
       if (!buffer || !isActive) return;
 
+      // Tab completion: delegate to caller instead of inserting a tab character
+      if (key.name === 'tab') {
+        onTab?.();
+        return;
+      }
+
+      // Arrow-key completion navigation: delegate to caller
+      if (key.name === 'up' && onUp) {
+        onUp();
+        return;
+      }
+      if (key.name === 'down' && onDown) {
+        onDown();
+        return;
+      }
+
       // Submit on Enter
       if (keyMatchers[Command.SUBMIT](key) || key.name === 'return') {
         if (allowMultiline) {