886be83af5
FilesTab in WorkspaceDetailPage was returning early for directories with no action, making folders unclickable. Changes: - use-workspace-files.ts: add currentPath state and navigateTo() function; refresh() now passes currentPath to listWorkspaceFiles API - WorkspaceDetailPage.tsx FilesTab: handleSelect now calls navigateTo() for directories; added navigateUp() button using '..' when not at root - Clear selected file/editor state when changing directories Quality gates: tsc --noEmit pass, npm run build pass, 82/82 tests pass