Refactor validation for better readability

**Problem**
When working with components, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

The issue names no files, tests, or entry points; start by locating component validation and the existing error-message paths. Done means error handling is easier to read and component failures produce more descriptive messages, with relevant checks still passing.

Written by the indexing model from the issue text.