Add bulk management to the Lovelace card

[26tajeen]

Summary

• expose each event internal ID as a sensor attribute
• add a life_events.delete_events action with entity-registry cleanup
• add an opt-in Lovelace management mode with select-all and confirmed bulk deletion
• optionally link a normal card to a separately configured management view
• improve narrow-card text layout and raise the visual editor event limit
• keep both checked-in card bundles synchronized and add Node tests

Safety and compatibility

Management mode is disabled by default. A Manage button is only rendered when manage_path is explicitly configured. Older events without an internal ID are supported through their entity IDs. Deletion requires browser confirmation.

Validation

• Node syntax check and 3 card behaviour tests
• checked both distributed JavaScript files are identical
• Python compilation and flake8
• JSON translation validation
• git diff --check

This is intentionally separate from CSV import so either feature can be reviewed and merged independently.