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-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "siteforge",
-  "version": "2.10.9",
+  "version": "2.10.10",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "siteforge",
-      "version": "2.10.9",
+      "version": "2.10.10",
       "dependencies": {
         "@aws-sdk/client-s3": "^3.1135.0",
         "@dnd-kit/core": "^6.3.1",