Fix certificate View link (wrong /study/certificate URL), certificates in My Account, name on certificate; v2.10.10

- Certificate URLs in the account overview and the issuance email pointed at /study/certificate/:token,
  which the router treated as a lesson page; now /certificate/:token (old links redirect)
- My Account Certificates card lists every enrolled study: progress, Generate, View, Copy link, Download PNG, Share
- Certificate canvas used a non-existent /api/study-account route and always printed 'Student'; now reads the account name
- Panel no longer collapses after generating

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.10.9",
+  "version": "2.10.10",
   "type": "module",
   "scripts": {
     "dev": "vite",