Hide empty profile event sections after filtering

[minhluuquang]

Description

Moves the events-filter group target from the profile event grids to the Future/Past section wrappers. When a kind filter hides every card in one section, the Stimulus controller now hides that section heading with the grid instead of leaving an empty "Future Events" or "Past Events" heading visible.

Screenshots

Not included; this is a small markup target change for the existing filter behavior.

Testing Steps

• bin/vite build --clear --mode=test
• bin/rails test test/controllers/profiles/events_controller_test.rb
• bundle exec erb_lint app/views/profiles/_events.html.erb
• git diff --check

References

• closes Don't show "Future Events" if there are no future events of this kind #1834

[marcoroth]

Thank you @minhluuquang! 🙏🏼