chore: relicense under the GNU AGPLv3

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

frontend/package-lock.json

@@ -1,13 +1,13 @@
 {
   "name": "mindsift-frontend",
-  "version": "0.48.0",
+  "version": "0.49.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mindsift-frontend",
-      "version": "0.48.0",
-      "license": "Unlicense",
+      "version": "0.49.0",
+      "license": "AGPL-3.0-only",
       "dependencies": {
         "@fontsource-variable/inter": "5.3.0",
         "@types/prismjs": "^1.26.6",