Add folder and post details fetching in ManagePage; implement delete confirmation modal for folders with recursive deletion option in API.

src/app/api/admin/folders/details/route.ts

@@ -0,0 +1,40 @@
+import { NextResponse } from 'next/server';
+import fs from 'fs';
+import path from 'path';
+
+const postsDirectory = path.join(process.cwd(), 'posts');
+
+function getFolderStats(folderPath: string) {
+  const fullPath = path.join(postsDirectory, folderPath);
+  let items = 0;
+  let size = 0;
+  let created = '';
+  try {
+    const stat = fs.statSync(fullPath);
+    created = stat.birthtime.toISOString();
+    const walk = (dir: string) => {
+      const files = fs.readdirSync(dir);
+      for (const file of files) {
+        const filePath = path.join(dir, file);
+        const stats = fs.statSync(filePath);
+        if (stats.isDirectory()) {
+          walk(filePath);
+        } else {
+          items++;
+          size += stats.size;
+        }
+      }
+    };
+    walk(fullPath);
+  } catch {
+    // ignore errors
+  }
+  return { created, items, size };
+}
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url);
+  const folderPath = searchParams.get('path') || '';
+  const stats = getFolderStats(folderPath);
+  return NextResponse.json(stats);
+}