LNbits 1.4 changed g.user initialization (PR #3615), moving it from
windowMixin to base.html. This means g.user can be null during initial
Vue template evaluation.
- Use optional chaining g.user?.wallets || [] in template
- Add null guard before accessing this.g.user.wallets in JS
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>