style: 文章/案例列表改为纯文字竖向列表

去掉封面图卡片网格，改为单列分隔线列表：
- 文章行：日期 | 标题 | 栏目
- 案例行：日期 | 标题，下方摘要与客户

顺带清理去掉图片后已无引用的 fileUrl 解构，
并为案例列表补上空状态（此前空数据渲染为空白）。

app/templates/template-07/pages/NewsList.vue

@@ -14,34 +14,25 @@
       </div>
 
       <template v-else>
-        <div v-if="articles.length > 0" class="grid md:grid-cols-2 lg:grid-cols-3 gap-6">
-          <article
-            v-for="item in articles"
-            :key="item.id || item.articleId"
-            class="bg-white rounded-xl overflow-hidden shadow-sm hover:shadow-md transition-shadow"
-          >
-            <NuxtLink :to="`/article/${item.id || item.articleId}`">
-              <div class="aspect-video bg-gray-100 flex items-center justify-center">
-                <img
-                  v-if="item.image || item.cover || item.photo"
-                  :src="fileUrl(item.image || item.cover || item.photo || '')"
-                  :alt="item.title"
-                  class="w-full h-full object-cover"
-                >
-                <span v-else class="text-gray-400">暂无图片</span>
-              </div>
-            </NuxtLink>
-            <div class="p-5">
-              <div class="text-xs text-gray-500 mb-2">
-                {{ formatDate(item.publishTime || item.createTime) }}
-                <span v-if="item.categoryName" class="ml-2 text-blue-600">{{ item.categoryName }}</span>
-              </div>
-              <h2 class="text-lg font-semibold text-gray-900 mb-2 line-clamp-2 hover:text-blue-600 transition-colors">
-                <NuxtLink :to="`/article/${item.id || item.articleId}`">{{ item.title }}</NuxtLink>
-              </h2>
-              <p class="text-sm text-gray-600 line-clamp-2">{{ stripHtml(item.summary) }}</p>
-            </div>
-          </article>
+        <div v-if="articles.length > 0" class="max-w-[1200px] mx-auto bg-white rounded-xl shadow-sm px-6 py-2">
+          <ul class="divide-y divide-gray-100">
+            <li v-for="item in articles" :key="item.id || item.articleId">
+              <NuxtLink
+                :to="`/article/${item.id || item.articleId}`"
+                class="flex items-baseline gap-4 py-4 group"
+              >
+                <span class="shrink-0 text-xs text-gray-400 tabular-nums">
+                  {{ formatDate(item.publishTime || item.createTime) }}
+                </span>
+                <span class="flex-1 min-w-0 text-base text-gray-900 truncate group-hover:text-blue-600 transition-colors">
+                  {{ item.title }}
+                </span>
+                <span v-if="item.categoryName" class="shrink-0 text-xs text-blue-600">
+                  {{ item.categoryName }}
+                </span>
+              </NuxtLink>
+            </li>
+          </ul>
         </div>
 
         <!-- 空状态 -->
@@ -86,7 +77,6 @@ import type { Article, PageResult, ApiEnvelope, CmsNavigation } from '~/types'
 import { collectDescendantNavIds } from '~/utils/nav-tree'
 
 const { allNavigations, fetchSiteInfo } = useSite()
-const { fileUrl } = useFileUrl()
 const route = useRoute()
 
 await fetchSiteInfo()