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/domain/workspace.go

@@ -34,6 +34,7 @@ type QuotaSummary struct {
 type KolWorkspaceCard struct {
 	SubscriptionPromptID int64     `json:"subscription_prompt_id"`
 	GrantedAt            time.Time `json:"granted_at"`
+	UpdatedAt            time.Time `json:"updated_at"`
 	PromptName           string    `json:"prompt_name"`
 	PlatformHint         *string   `json:"platform_hint"`
 	PackageName          string    `json:"package_name"`