Hotfix/v11 emails mismatch

[AlexSanchez-bit]

Main changes

• fixed full space email title (was referencing TFA)
• fixed account creation email title (was referencing account activation)

[github-actions]

✅ AI review — Approved

No issues detected in this diff.

✅ architecture (gemini-3-flash-lite) — clean

Summary: Routine dependency version bumps and minor backend template/i18n updates without architectural deviations.

No findings.

✅ bugs (gemini-3-flash-lite) — clean

Summary: Dependency version updates and mail template title correction for account creation.

No findings.

✅ security (gemini-3-flash-lite) — clean

Summary: Routine dependency version updates and minor email template copy fixes with no security or privacy impact.

No findings.

[utmstackprapprover]

Changes requested — Go dependencies check failed (see above).

[utmstackprapprover]

Approved — no blocking issues, deps OK, authorized author. Any non-blocking warnings are listed above.