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/i18n/messages/zh-CN.ts

@@ -71,6 +71,7 @@ const zhCN = {
     templates: "模版创作",
     custom: "自定义生成",
     freeCreate: "自由创作",
+    imitation: "仿写创作",
     media: "媒体管理",
     brandManagement: "品牌管理",
     brands: "品牌词库",
@@ -150,6 +151,14 @@ const zhCN = {
       title: "自由创作",
       description: "自由创建并编辑文章，无需模版或AI生成。",
     },
+    imitation: {
+      title: "仿写创作",
+      description: "管理基于引用来源或外部文章发起的仿写生成记录。",
+    },
+    imitationCreate: {
+      title: "仿写创作",
+      description: "从文章链接提取内容后，一步生成适配当前场景的新文章。",
+    },
     media: {
       title: "媒体管理",
       description: "统一查看桌面端媒体账号绑定、授权状态与同步结果。",
@@ -385,6 +394,7 @@ const zhCN = {
     citationAnalysisTitle: "引用分析",
     contentCitations: "Content Citations",
     contentCitationsTitle: "内容引用",
+    imitationAction: "仿写创作",
     taskDebugTitle: "异步任务调试",
     taskDebugHint: "仅用于排查 callback -> queue -> worker 的异步流转，不影响上方四块主内容。",
     contentCitationBadge: "内容引用",
@@ -551,9 +561,76 @@ const zhCN = {
       instant_task: "即时任务",
       schedule_task: "定时任务",
       free_create: "自由创作",
+      imitation: "仿写创作",
       kol: "精调模版生成",
     },
   },
+  imitation: {
+    actions: {
+      create: "新建仿写",
+      submit: "提交并生成",
+    },
+    filters: {
+      publishStatus: "发布状态",
+      generateStatus: "生成状态",
+      keyword: "搜索文章",
+      createdTime: "创建时间",
+      createdTimeStart: "开始时间",
+      createdTimeEnd: "结束时间",
+      keywordPlaceholder: "请输入标题内容搜索",
+    },
+    list: {
+      eyebrow: "仿写创作",
+      count: "共 {count} 篇文章",
+      sourceArticle: "原文",
+      empty: "还未创建仿写文章，可从问题详情的引用来源一键带入，也可以手动新建。",
+      deleteConfirm: "确认删除这篇仿写文章吗？",
+      deleteSuccess: "文章已删除",
+      deleteError: "删除文章失败",
+    },
+    create: {
+      title: "创建仿写文章",
+      subtitle: "后台会先抓取源文章内容，再按下方设定生成一篇新的原创表达文章。",
+      sourceSection: "来源文章",
+      settingsSection: "仿写设置",
+      sourceURL: "文章 URL",
+      sourceTitle: "来源标题",
+      language: "文章语言",
+      industry: "行业/场景",
+      brandName: "品牌/主体",
+      region: "地域",
+      targetAudience: "目标读者",
+      contentGoal: "内容目标",
+      tone: "语气风格",
+      lengthGoal: "篇幅要求",
+      keywords: "关键词",
+      preservePoints: "必须保留/强调",
+      avoidPoints: "需要规避",
+      extraRequirements: "其他要求",
+      enableWebSearch: "允许联网补充",
+      webSearchHint: "开启后，生成时会让大模型参考实时网页信息，适合需要最新事实或行业动态的仿写。",
+      knowledgeBase: "引用知识库",
+      knowledgeBasePlaceholder: "可选，用于补充文章事实、品牌资料和行业背景",
+      knowledgeBaseHint: "选择后，后台会检索相关知识片段并作为生成参考，未选择则只基于来源文章和当前设置生成。",
+      sourceURLPlaceholder: "https://example.com/article",
+      sourceTitlePlaceholder: "可选，引用来源标题会自动带入",
+      industryPlaceholder: "例如：家居建材、教育培训、SaaS、医疗健康",
+      brandNamePlaceholder: "可选，填写后文章会自然贴合该品牌或主体",
+      regionPlaceholder: "例如：上海、华东、全国、北美市场",
+      targetAudiencePlaceholder: "例如：首次购买用户、渠道代理、企业采购负责人",
+      contentGoalPlaceholder: "例如：科普说明、转化种草、品牌信任、选型建议",
+      tonePlaceholder: "例如：专业可信、轻松口语、评测对比、新闻解读",
+      lengthGoalPlaceholder: "例如：1200字左右、短文、深度长文",
+      keywordsPlaceholder: "输入关键词后回车，可多选",
+      preservePointsPlaceholder: "列出必须保留的事实、数据、观点或案例",
+      avoidPointsPlaceholder: "列出不能出现的说法、竞品、合规禁区或表达方式",
+      extraRequirementsPlaceholder: "补充行业、渠道、结构、标题风格等自由要求",
+      queued: "仿写任务已提交，正在排队生成",
+      sourceURLRequired: "请先填写来源文章 URL",
+      submitError: "仿写任务提交失败",
+      backToList: "返回仿写列表",
+    },
+  },
   freeCreate: {
     actions: {
       create: "新建文章",
@@ -863,6 +940,7 @@ const zhCN = {
       templateType: "模版类型",
       currentVersion: "当前版本",
       source: "生成来源",
+      sourceArticle: "源文链接",
       wordCount: "文章字数",
     },
     versionUntitled: "未命名版本",