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/repository/workspace_repo.go

@@ -31,6 +31,7 @@ type WorkspacePlan struct {
 type WorkspaceKolCard struct {
 	SubscriptionPromptID int64
 	GrantedAt            time.Time
+	UpdatedAt            time.Time
 	PromptName           string
 	PlatformHint         *string
 	PackageName          string
@@ -127,6 +128,7 @@ func (r *workspaceRepository) ListKolCards(ctx context.Context, tenantID int64)
 		cards = append(cards, WorkspaceKolCard{
 			SubscriptionPromptID: row.SubscriptionPromptID,
 			GrantedAt:            timeFromTimestamp(row.GrantedAt),
+			UpdatedAt:            timeFromTimestamp(row.UpdatedAt),
 			PromptName:           row.PromptName,
 			PlatformHint:         nullableText(row.PlatformHint),
 			PackageName:          row.PackageName,