引入二级大纲功能，新增父子节点关系及子节点排序，同时调整API与UI以支持嵌套大纲管理

frontend/src/views/WorldSettingView.vue

@@ -1,9 +1,9 @@
 <script setup lang="ts">
-import { ref, onMounted, computed } from 'vue'
+import { ref, inject, onMounted, computed } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
-import { fetchNovel } from '@/api/novels'
 import { fetchWorldSetting, saveWorldSetting } from '@/api/worldSetting'
 import { useToast } from '@/composables/useToast'
+import { useToolRefresh } from '@/composables/useToolRefresh'
 import type { Novel } from '@/types/novel'
 import BaseButton from '@/components/ui/BaseButton.vue'
 import BaseTextarea from '@/components/ui/BaseTextarea.vue'
@@ -12,8 +12,9 @@ const route = useRoute()
 const router = useRouter()
 const toast = useToast()
 
-const novelId = Number(route.params.id)
-const novel = ref<Novel | null>(null)
+const novelId = inject<number>('workspace-novel-id', Number(route.params.id))
+const novel = inject<import('vue').Ref<Novel | null>>('workspace-novel', ref(null))
+const subtitle = inject<import('vue').Ref<string>>('workspace-subtitle', ref(''))
 const content = ref('')
 const loading = ref(true)
 const saving = ref(false)
@@ -26,14 +27,16 @@ const contentHint = computed(() => {
   return `${contentLength.value} 字`
 })
 
+// 世界观页不需要副标题
+subtitle.value = ''
+
+// AI 工具执行后自动刷新世界观数据
+useToolRefresh(['get_world_setting', 'save_world_setting'], load)
+
 async function load() {
   loading.value = true
   try {
-    const [n, ws] = await Promise.all([
-      fetchNovel(novelId),
-      fetchWorldSetting(novelId),
-    ])
-    novel.value = n
+    const ws = await fetchWorldSetting(novelId)
     content.value = ws.content
   } catch {
     toast.error('加载失败')
@@ -64,15 +67,8 @@ onMounted(load)
 </script>
 
 <template>
-  <div v-if="!loading && novel" class="world-view">
-    <div class="world-header">
-      <BaseButton variant="ghost" @click="router.push({ name: 'novel-detail', params: { id: novelId } })">
-        &larr; 返回
-      </BaseButton>
-      <div class="header-center">
-        <h1 class="world-title">{{ novel.title }}</h1>
-        <p class="world-subtitle">世界观设定</p>
-      </div>
+  <div v-if="!loading" class="world-view">
+    <Teleport to="#workspace-actions">
       <BaseButton
         variant="primary"
         :loading="saving"
@@ -81,7 +77,7 @@ onMounted(load)
       >
         保存
       </BaseButton>
-    </div>
+    </Teleport>
 
     <div class="editor-container">
       <div class="editor-hint">
@@ -124,33 +120,6 @@ onMounted(load)
   animation: fadeInUp var(--duration-normal) var(--ease-out-smooth) both;
 }
 
-.world-header {
-  display: flex;
-  align-items: flex-start;
-  justify-content: space-between;
-  gap: var(--space-md);
-  margin-bottom: var(--space-2xl);
-}
-
-.header-center {
-  flex: 1;
-  text-align: center;
-}
-
-.world-title {
-  font-family: var(--font-display);
-  font-size: 1.8rem;
-  font-weight: 700;
-  color: var(--ink-900);
-  line-height: 1.3;
-}
-
-.world-subtitle {
-  font-size: 0.85rem;
-  color: var(--ink-400);
-  margin-top: var(--space-xs);
-}
-
 .editor-container {
   background: var(--paper-50);
   border: 1px solid var(--paper-200);