- Align template syntax with `!include_dir_merge_named` setup
- Remove invalid nested `template:` key from included file
- Add `unique_id` for proper entity registration and UI management
- Refactor state logic using list + select for cleaner evaluation
- (Optional) add explicit triggers to ensure reliable state updates
Fixes issue where `binary_sensor.family_presence` did not update correctly,
causing presence-based automations to fail.
claus