feat(kol): return to source page after generation and poll while busy

- Add a ?source=workspace|templates query param when opening the
  generate page so the back button and the post-submit redirect return
  to the originating page; invalidate articles + workspace caches on
  success so the new article shows up immediately.
- Poll recent articles every 10s in WorkspaceView and TemplatesView
  while any article is in queued/pending/generating/running, and stop
  the timer once nothing is active.
- Mark the new article as generating inside the generation Submit
  transaction so the client sees the right status as soon as the task
  is queued.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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

@@ -189,6 +189,10 @@ const displayedArticleTotal = computed(() =>
 
 let articlePollingTimer: number | null = null;
 
+function hasActiveGenerationStatus(status?: string | null): boolean {
+  return status === "queued" || status === "pending" || status === "generating" || status === "running";
+}
+
 const deleteMutation = useMutation({
   mutationFn: (articleId: number) => articlesApi.remove(articleId),
   onSuccess: async () => {
@@ -324,7 +328,11 @@ function startTemplate(template: TemplateListItem): void {
 function openRefinedTemplate(card: KolWorkspaceCard): void {
   pickerOpen.value = false;
   pickerMode.value = null;
-  void router.push({ name: "kol-generate", params: { subscriptionPromptId: String(card.subscription_prompt_id) } });
+  void router.push({
+    name: "kol-generate",
+    params: { subscriptionPromptId: String(card.subscription_prompt_id) },
+    query: { source: "templates" },
+  });
 }
 
 async function openEditor(article: ArticleListItem): Promise<void> {
@@ -362,7 +370,7 @@ watch(
   () => displayedArticles.value,
   (items: ArticleListItem[]) => {
     const hasGeneratingArticles = items.some((item: ArticleListItem) =>
-      item.generate_status === "generating" || item.generate_status === "running",
+      hasActiveGenerationStatus(item.generate_status),
     );
 
     if (hasGeneratingArticles) {
@@ -390,8 +398,8 @@ function startArticlePolling(): void {
   }
 
   articlePollingTimer = window.setInterval(() => {
-    void articleListQuery.refetch();
-  }, 3000);
+    void Promise.all([articleListQuery.refetch(), recentArticlesQuery.refetch()]);
+  }, 10000);
 }
 
 function stopArticlePolling(): void {