chore(tooling): remove stale apps/admin entry from .vscode/settings.json

apps/admin/ was removed in April 2026 (admin SPA merged into apps/app/
under /platform/*). Cursor's ESLint extension silently skipped the
missing directory, but the dead config entry caused confusion when
debugging extension activation issues.

Closes TECH-VSCODE-STALE-ADMIN-ENTRY.

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

.vscode/settings.json

@@ -17,10 +17,6 @@
   "eslint.nodePath": "apps/app/node_modules",
   "eslint.run": "onSave",
   "eslint.workingDirectories": [
-    {
-      "directory": "apps/admin",
-      "changeProcessCWD": true
-    },
     {
       "directory": "apps/app",
       "changeProcessCWD": true