feat: add Word (.docx) export, enhance print density, and fix auth security guards

apps/web/app/api/export/route.ts

@@ -1,5 +1,10 @@
 import { NextRequest, NextResponse } from "next/server";
-import { getExportDocuments, compileExportMarkdown, type ExportSortOption } from "@mcpedia/core";
+import {
+  getExportDocuments,
+  compileExportMarkdown,
+  generateExportDocx,
+  type ExportSortOption,
+} from "@mcpedia/core";
 
 export const dynamic = "force-dynamic";
 
@@ -11,6 +16,8 @@ export async function GET(req: NextRequest) {
   const sortBy = (searchParams.get("sort") as ExportSortOption) || "category_points";
   const slugsParam = searchParams.get("slugs");
   const slugs = slugsParam ? slugsParam.split(",").map((s) => s.trim()) : undefined;
+  const pageBreaksParam = searchParams.get("pageBreaks");
+  const pageBreaks = pageBreaksParam !== "false" && pageBreaksParam !== "0";
 
   try {
     const data = await getExportDocuments({
@@ -20,13 +27,25 @@ export async function GET(req: NextRequest) {
       sortBy,
     });
 
+    const safeFilename = data.summary.title
+      .toLowerCase()
+      .replace(/[^a-z0-9]+/g, "-")
+      .replace(/^-|-$/g, "") || "mcpedia-export";
+
+    if (format === "docx" || format === "word") {
+      const buffer = await generateExportDocx(data, { pageBreaks });
+      const uint8 = new Uint8Array(buffer);
+      return new NextResponse(uint8, {
+        headers: {
+          "Content-Type":
+            "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+          "Content-Disposition": `attachment; filename="${safeFilename}.docx"`,
+        },
+      });
+    }
+
     if (format === "markdown" || format === "md") {
       const md = compileExportMarkdown(data);
-      const safeFilename = data.summary.title
-        .toLowerCase()
-        .replace(/[^a-z0-9]+/g, "-")
-        .replace(/^-|-$/g, "");
-
       return new NextResponse(md, {
         headers: {
           "Content-Type": "text/markdown; charset=utf-8",