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>

apps/admin-web/src/views/KolGenerateView.vue

@@ -9,6 +9,11 @@ import { kolGenerateApi } from "@/lib/api";
 import KolDynamicForm from "@/components/kol/KolDynamicForm.vue";
 import KnowledgeGroupSelect from "@/components/KnowledgeGroupSelect.vue";
 import { parseKolCardConfig } from "@/lib/kol-card-config";
+import {
+  getKolVariableInitialValue,
+  isKolVariableValueEmpty,
+  normalizeKolVariableDefinition,
+} from "@/lib/kol-placeholders";
 
 const route = useRoute();
 const router = useRouter();
@@ -42,7 +47,7 @@ watch(
     if (schema?.schema_json?.variables) {
       const newValues: Record<string, any> = {};
       schema.schema_json.variables.forEach((v) => {
-        newValues[fieldKey(v.key, v.id)] = v.type === "checkbox" ? [] : undefined;
+        newValues[fieldKey(v.key, v.id)] = getKolVariableInitialValue(normalizeKolVariableDefinition(v));
       });
       values.value = newValues;
       enableWebSearch.value = false;
@@ -78,7 +83,8 @@ function handleSubmit() {
 
   const missingLabels: string[] = [];
   schema.schema_json.variables.forEach((v) => {
-    if (v.required && !values.value[fieldKey(v.key, v.id)]) {
+    const normalizedVariable = normalizeKolVariableDefinition(v);
+    if (normalizedVariable.required && isKolVariableValueEmpty(normalizedVariable, values.value[fieldKey(v.key, v.id)])) {
       missingLabels.push(v.label);
     }
   });