fix(cms): 修三处后台保存裂缝——新文缺 tags 构建拦截、头像传错嵌套路径、表单与 schema 契约不对齐

- 佩德罗·巴拉莫补必填 tags（read，与等待戈多同口径）——生产构建已被拦（last-good 兜底服务中）
- 头像 118a04cd0986b9c5.jpg 从嵌套误传路径（content/site/content/site/assets/）挪到 home.yaml 引用的 content/site/assets/——Sveltia 对 file 集合 media_folder 按文件目录相对解析，content/site/assets 写法翻倍成嵌套；改为 assets
- posts/moments 标签表单 required 对齐 schema 必填（z.array 无 default，漏保存即构建失败）

验证: pnpm astro build exit 0（52 页，无 InvalidContentEntryData）；config-check 通过

Spec: none (生产构建阻塞的紧急内容修复)

Co-authored-by: GLM-5.3

content/posts/佩德罗·巴拉莫.md

@@ -2,6 +2,8 @@
 title: 佩德罗·巴拉莫
 pubDate: 2026-04-25
 category: reading
+tags:
+  - read
 pinned: false
 mood: '#3bfe04'
 bookAuthor: 胡安·鲁尔福

public/admin/config.yml

@@ -37,7 +37,7 @@ collections:
       - { label: 标题, name: title, widget: string }
       - { label: 日期, name: pubDate, widget: datetime, date_format: 'YYYY-MM-DD', time_format: false, format: 'YYYY-MM-DD' }
       - { label: 分轨, name: category, widget: select, options: [{label: 阅读, value: reading}, {label: 技术, value: tech}, {label: 照片, value: photo}] }
-      - { label: 标签, name: tags, widget: list, required: false }
+      - { label: 标签, name: tags, widget: list, required: true, hint: '至少一个（可写 read/写作/站点更新等）；schema 必填，漏了构建会拦' }
       - { label: 置顶, name: pinned, widget: boolean, required: false, default: false, hint: '置顶文章排在首页/归档/书架最前；只影响顺序，不改日期、URL 与 RSS 时间语义' }
       - { label: 情绪色（书评色脊）, name: mood, widget: color, required: false, hint: '#RRGGBB，仅阅读轨使用' }
       - { label: 原书作者, name: bookAuthor, widget: string, required: false }
@@ -112,7 +112,7 @@ collections:
       - label: 标签
         name: tags
         widget: list
-        required: false
+        required: true
       - { label: 置顶, name: pinned, widget: boolean, required: false, default: false, hint: '置顶瞬间排时间线最前（可多置顶，之间按日期倒序）；只影响顺序不改日期' }
       - { label: 隐藏, name: hidden, widget: boolean, required: false, default: false, hint: '隐藏后从时间线移除；评论数据保留在服务端，关掉开关即恢复' }
   - name: photos
@@ -222,7 +222,7 @@ collections:
         file: content/site/home.yaml
         format: yaml
         # 头像上传落 content/site/assets/，yaml 写 ./assets/xxx（Astro 图片管线优化）
-        media_folder: content/site/assets
+        media_folder: assets
         public_folder: ./assets
         fields:
           - label: 身份语
@@ -331,7 +331,7 @@ collections:
         file: content/site/about.yaml
         format: yaml
         # 块内图片上传落 content/site/assets/，yaml 写 ./assets/xxx（Astro 图片管线）
-        media_folder: content/site/assets
+        media_folder: assets
         public_folder: ./assets
         fields:
           - label: 整页正文（推荐改这里，方案 A 白纸直编）