chore(spec): 5i 勾选 T1

Spec: 2026-11-02_blog-5i-fonts-polish

Co-authored-by: GLM-5.3

.spec/specs/2026-11-02_blog-5i-fonts-polish/tasks.md

@@ -7,7 +7,7 @@
 
 ## 阶段一：实现
 
-- [ ] T1 字族按需加载根治
+- [x] T1 字族按需加载根治
   - claim: worker-one
   - boundary: src/layouts/BaseLayout.astro（去掉 `track === 'reading'` 的字体门禁，改为「本页内容实际用到的字族」驱动：构建期扫正文/页面文案里的 `font-kai|font-song|font-fangsong|font-huiwen|font-kuaile|font-serif` 决定注入哪几份字体 CSS；零命中时只加载 sans/mono）、src/lib/ 新增字体诉求探测工具
   - verify: `grep -q "FONT_CSS\|neededFonts" src/layouts/BaseLayout.astro && E2E_BASE=http://127.0.0.1:18925 node tests/e2e.mjs 2>&1 | grep -qE "汇总: [0-9]+/[0-9]+ PASS"`