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/components/ArticleDetailDrawer.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { CopyOutlined } from "@ant-design/icons-vue";
+import { CopyOutlined, LinkOutlined } from "@ant-design/icons-vue";
 import { useQuery, useQueryClient } from "@tanstack/vue-query";
 import { message } from "ant-design-vue";
 import type { TableColumnsType } from "ant-design-vue";
@@ -122,6 +122,8 @@ const generateMeta = computed(() =>
   getGenerateStatusMeta(streamStatus.value || detail.value?.generate_status),
 );
 const publishMeta = computed(() => getPublishStatusMeta(detail.value?.publish_status));
+const sourceArticleTitle = computed(() => detail.value?.source_title?.trim() || "");
+const sourceArticleURL = computed(() => detail.value?.source_url?.trim() || "");
 
 function handleClose(): void {
   activeTab.value = "content";
@@ -284,6 +286,27 @@ async function copyPublishLink(record: PublishRecord): Promise<void> {
           <a-descriptions-item :label="t('article.meta.wordCount')">
             {{ detail.word_count || "--" }}
           </a-descriptions-item>
+          <a-descriptions-item
+            v-if="sourceArticleURL"
+            :label="t('article.meta.sourceArticle')"
+            :span="2"
+          >
+            <a
+              class="article-drawer__source-link"
+              :href="sourceArticleURL"
+              target="_blank"
+              rel="noopener noreferrer"
+              :title="sourceArticleURL"
+            >
+              <LinkOutlined />
+              <span class="article-drawer__source-copy">
+                <span v-if="sourceArticleTitle" class="article-drawer__source-title">
+                  {{ sourceArticleTitle }}
+                </span>
+                <span class="article-drawer__source-url">{{ sourceArticleURL }}</span>
+              </span>
+            </a>
+          </a-descriptions-item>
         </a-descriptions>
       </section>
 
@@ -423,6 +446,37 @@ async function copyPublishLink(record: PublishRecord): Promise<void> {
   margin-top: 24px;
 }
 
+.article-drawer__source-link {
+  display: inline-flex;
+  max-width: 100%;
+  align-items: center;
+  gap: 6px;
+  color: #1677ff;
+}
+
+.article-drawer__source-copy {
+  display: flex;
+  min-width: 0;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.article-drawer__source-title,
+.article-drawer__source-url {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.article-drawer__source-title {
+  color: #1f2937;
+  font-weight: 500;
+}
+
+.article-drawer__source-url {
+  color: #1677ff;
+}
+
 .article-drawer__alert {
   margin-top: 24px;
 }