feat(imitation): add article imitation create flow

Introduce 仿写创作: new list and create views, backend imitation service
and prompt templates, worker task routing for imitation jobs, and one-click
rewrite triggers from question citation sources. Surface source article
URL/title on article list/detail, and restrict failed articles to delete-only.

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

apps/admin-web/src/lib/api.ts

@@ -7,6 +7,8 @@ import type {
   ArticleListResponse,
   CreateArticleRequest,
   ArticleVersion,
+  GenerateImitationRequest,
+  GenerateImitationResponse,
   AuthTokens,
   Brand,
   BrandLibrarySummary,
@@ -559,6 +561,12 @@ export const articlesApi = {
   create(payload: CreateArticleRequest = {}) {
     return apiClient.post<ArticleDetail, CreateArticleRequest>("/api/tenant/articles", payload);
   },
+  generateImitation(payload: GenerateImitationRequest) {
+    return apiClient.post<GenerateImitationResponse, GenerateImitationRequest>(
+      "/api/tenant/articles/imitations/generate",
+      payload,
+    );
+  },
   detail(id: number) {
     return apiClient.get<ArticleDetail>(`/api/tenant/articles/${id}`);
   },

apps/admin-web/src/lib/article-list-actions.ts

@@ -19,7 +19,7 @@ export function resolveArticleActionState(generateStatus?: string | null): Artic
     };
   }
 
-  if (generateStatus === "draft" || generateStatus === "failed") {
+  if (generateStatus === "draft") {
     return {
       showPublish: false,
       showEdit: true,
@@ -29,6 +29,16 @@ export function resolveArticleActionState(generateStatus?: string | null): Artic
     };
   }
 
+  if (generateStatus === "failed") {
+    return {
+      showPublish: false,
+      showEdit: false,
+      showPreview: false,
+      showCopy: false,
+      showDelete: true,
+    };
+  }
+
   return {
     showPublish: false,
     showEdit: false,

apps/admin-web/src/lib/display.ts

@@ -77,6 +77,9 @@ export function getSourceTypeLabel(sourceType?: string | null, generationMode?:
   if (sourceType === "free_create") {
     return i18n.global.t("status.sourceType.free_create");
   }
+  if (sourceType === "imitation") {
+    return i18n.global.t("status.sourceType.imitation");
+  }
   if (sourceType === "kol") {
     return i18n.global.t("status.sourceType.kol");
   }

apps/admin-web/src/lib/errors.ts

@@ -29,7 +29,7 @@ const errorMessageMap: Record<string, string> = {
   article_generating: "文章仍在生成中",
   article_not_editable: "只有已完成文章才可编辑",
   article_lookup_failed: "文章状态读取失败",
-  draft_not_editable: "只有草稿或生成失败的文章才可继续在向导中编辑",
+  draft_not_editable: "只有草稿文章才可继续在向导中编辑",
   article_title_required: "请输入文章标题",
   invalid_image: "请选择图片文件",
   image_upload_too_large: "图片不能超过 10MB",