feat(kol): expand variable schema and polish KOL UI

- Add length/range limits to KOL variable definitions: max_length and
  default_value for input/textarea, min_value/max_value/default_number
  for number. Backend validates and normalizes; frontend renders limit
  inputs in KolVariableConfig and applies limits at runtime in
  KolDynamicForm.
- Sort workspace cards by most recent prompt/package update, falling
  back to granted_at. Adds updated_at to KolWorkspaceCard.
- Polish TemplatesView, WorkspaceView, and KOL package management UI;
  route create/update/publish/archive/delete toasts through i18n and
  expand package form copy and status labels.
- Remove stale KnowledgeView.vue.patch.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

server/internal/tenant/app/workspace_service.go

@@ -162,6 +162,7 @@ func (s *WorkspaceService) KolCards(ctx context.Context) ([]domain.KolWorkspaceC
 			cards = append(cards, domain.KolWorkspaceCard{
 				SubscriptionPromptID: row.SubscriptionPromptID,
 				GrantedAt:            row.GrantedAt,
+				UpdatedAt:            row.UpdatedAt,
 				PromptName:           row.PromptName,
 				PlatformHint:         row.PlatformHint,
 				PackageName:          row.PackageName,