Align Spanish Eventos copy with Annie's English refinements

[SairaAsua]

Summary

• integrate Annie's approved English editorial pass from Refine English copy on the events page #39 while preserving her original commit and authorship
• carry the same semantic refinements into natural Spanish rather than translating them literally
• add a regression that keeps the ten paired editorial decisions aligned across both languages

Spanish editorial alignment

The Spanish version now reflects the same distinctions introduced by Annie around:

• confirmed access details
• shared presence and group voices
• personal narrative in MythBot
• embodied practice
• an intimate, grounded setting
• the moving body
• the ear-to-ear meditation
• relationships that shaped the journey
• the Hospital CIMA staff session
• welcoming the proposal

Verification

• npm test: 5/5 test files pass
• npm run build: success
• git diff --check: clean
• visual review in localhost at 1440 px in Spanish and English
• matching Spanish and English language-marker counts

Scope

Only eventos/index.html and its copy regression changed. Registration, checkout, Ticket Tailor, confirmation, contracts, Meta and backend logic are untouched. The current fail-closed state for the August 11 English event is preserved.

Builds on #39.