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/KolPackageDetailView.vue

@@ -14,7 +14,7 @@ import {
   ClockCircleOutlined,
   ExclamationCircleOutlined,
 } from "@ant-design/icons-vue";
-import { kolMarketplaceApi } from "@/lib/api";
+import { kolMarketplaceApi, resolveApiURL } from "@/lib/api";
 import { formatError } from "@/lib/errors";
 
 const route = useRoute();
@@ -47,6 +47,7 @@ const subscribeMutation = useMutation({
 });
 
 const pkg = computed(() => packageQuery.data.value);
+const resolvedCoverUrl = computed(() => resolveApiURL(pkg.value?.cover_url));
 const subscription = computed(() => pkg.value?.subscription);
 
 const subscriptionStatusMeta = computed(() => {
@@ -102,8 +103,8 @@ function goBack() {
       <a-row :gutter="24">
         <a-col :xs="24" :lg="16">
           <section class="main-card">
-            <div class="package-cover" v-if="pkg.cover_url">
-              <img :src="pkg.cover_url" alt="cover" />
+            <div class="package-cover" v-if="resolvedCoverUrl">
+              <img :src="resolvedCoverUrl" alt="cover" />
             </div>
             <div class="package-info">
               <div class="package-title-row">