feat: 新增135编辑器转换子功能

- 新增 /editor135 子页面：上传幼儿园食谱docx → 解析并填充135模板 → 预览/源代码/解析结果三视图
- 新增 /api/editor135/render 解析接口（jsdom 解析填充，逐条回读校验 mismatch）
- 新增 /api/editor135/img 微信CDN图片代理（解决预览防盗链，仅允许 *.qpic.cn）
- 缺失星期自动删除：docx 缺某天（含周末/间隔天）时整段移除该天内容，尾部三审三校/温馨提示保留
- 逐节点精确区间删除算法：处理相邻天共用容器、嵌套结构，不误删保留天
- 新增依赖 jsdom + @types/jsdom；附 6 场景回归测试脚本 scripts/test-remove-days.ts
- 首页 header 增加「135编辑器转换」导航入口

app/api/editor135/render/route.ts

@@ -0,0 +1,51 @@
+import { NextRequest, NextResponse } from "next/server";
+import fs from "node:fs";
+import path from "node:path";
+import { parseDocxToRecipe, fillTemplate, extractTemplateRecipe, type Recipe } from "@/lib/editor135-core";
+
+export const runtime = "nodejs";
+
+function loadTemplate(): string {
+  // 优先取项目根目录可替换的外部模板, 其次内置模板
+  const external = path.join(process.cwd(), "template135.html");
+  if (fs.existsSync(external)) return fs.readFileSync(external, "utf8");
+  return fs.readFileSync(path.join(process.cwd(), "public", "template135.html"), "utf8");
+}
+
+export async function POST(req: NextRequest) {
+  try {
+    const form = await req.formData();
+    const file = form.get("file");
+    if (!(file instanceof File)) {
+      return NextResponse.json({ error: "请上传文件(表单字段名 file)" }, { status: 400 });
+    }
+    if (!/\.docx$/i.test(file.name)) {
+      return NextResponse.json({ error: "仅支持 .docx 文件" }, { status: 400 });
+    }
+    const buf = Buffer.from(await file.arrayBuffer());
+    const recipe: Recipe = await parseDocxToRecipe(buf);
+    if (!recipe.days.length) {
+      return NextResponse.json(
+        { error: "未能从文档中识别出食谱(需要包含 星期一~星期五 与 早餐/早点/午餐/体弱儿餐/午点 等关键词)" },
+        { status: 422 },
+      );
+    }
+    const template = loadTemplate();
+    const templateRecipe = extractTemplateRecipe(template);
+    const { html, report } = fillTemplate(template, recipe);
+    const totalItems = recipe.days.reduce((n, d) => n + d.meals.reduce((k, m) => k + m.items.length, 0), 0);
+    return NextResponse.json({
+      fileName: file.name,
+      recipe, report, html,
+      summary: {
+        days: recipe.days.length,
+        totalItems,
+        templateDays: templateRecipe.days.length,
+        templateItems: templateRecipe.days.reduce((n, d) => n + d.meals.reduce((k, m) => k + m.items.length, 0), 0),
+      },
+    });
+  } catch (e) {
+    const msg = e instanceof Error ? e.message : String(e);
+    return NextResponse.json({ error: `解析失败: ${msg}` }, { status: 500 });
+  }
+}