chore: 恢复旧布局基线（迁移改动丢失后重建，apps/packages 布局暂存）

server/internal/docs/render.go

@@ -0,0 +1,25 @@
+package docs
+
+import (
+	"html/template"
+	"strings"
+)
+
+func renderPage(h *Handler, p *Page) string {
+	tpl, err := template.New("doc").Parse(h.tpl)
+	if err != nil {
+		return "<!doctype html><meta charset=utf-8><title>error</title>template error: " + template.HTMLEscapeString(err.Error())
+	}
+
+	var sb strings.Builder
+	data := map[string]any{
+		"Manifest": h.manifest,
+		"Page":     p,
+		"TOC":      p.TOC,
+		"Content":  template.HTML(p.HTML), //nolint:gosec —— 内容为内置受信 Markdown
+	}
+	if err := tpl.Execute(&sb, data); err != nil {
+		return "<!doctype html><meta charset=utf-8><title>error</title>render error: " + template.HTMLEscapeString(err.Error())
+	}
+	return sb.String()
+}