chore(spec): 归档 blog-5n——八任务收敛（后台深度优化全家桶）

Spec: 2026-11-05_blog-5n-admin-deep-optimization

Co-authored-by: GLM-5.3

.spec/specs/archive/2026-11-05_blog-5n-admin-deep-optimization/evidence/verify_t1.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -euo pipefail
+cd "$(git rev-parse --show-toplevel)"
+export PATH="$HOME/.local/node/bin:$PATH"
+grep -q '0\.259\.0' public/admin/sveltia-cms.js
+node --check public/admin/sveltia-cms.js
+grep -c "registerPreviewStyle" public/admin/sveltia-cms.js >/dev/null
+pnpm astro build >/dev/null 2>&1
+echo "verify_t1 OK"