Add support for `.id()` (only apply if component.id is set)

[0xWDG]

Enhance the .id() support so that it is only applied if component.id is set.

Implementation details:

• Update logic to check if component.id is defined (not null/undefined/empty).
• Only apply .id() logic (e.g., setting attribute, propagating, etc.) when component.id is present.
• If component.id is not set, skip applying .id().

This ensures .id() is only applied to components that explicitly have an ID set, preventing default or unwanted behavior.