## What
Adds a new landing-page testimonial from **Albert G.**, sourced from a
user email.
- `welcome.tsx` — new entry (English source string) inserted before the
co-owner entry.
- `lang/es.json` — matching Spanish translation.
## Notes
- `gravatar` is the md5 of the sender's email.
- Adapted the message to fit: kept the praise (intuitive, functional,
daily-finance help, generous free tier), dropped the feature-request
portion (advanced auto-categorization, richer dashboards) since that's
roadmap feedback, not testimonial copy.
## Verification
- `LocalizationTest` passes (es.json key present, valid JSON).
- Prettier + ESLint clean.
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