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/generated/models.go

@@ -288,6 +288,9 @@ type KolPrompt struct {
 	CreatedAt           pgtype.Timestamptz `json:"created_at"`
 	UpdatedAt           pgtype.Timestamptz `json:"updated_at"`
 	DeletedAt           pgtype.Timestamptz `json:"deleted_at"`
+	PromptAssetKey      pgtype.Text        `json:"prompt_asset_key"`
+	SchemaJson          []byte             `json:"schema_json"`
+	CardConfigJson      []byte             `json:"card_config_json"`
 }
 
 type KolPromptRevision struct {