[Feature]: Add Unit Tests for the UI Rendering Engine

[pipe1os]

Problem Description

src/modelinfo/ui.py has only 7% test coverage. While testing terminal UI output can be tricky, the rich library provides a Console(record=True) feature that allows you to capture terminal output to a string for assertions.

Proposed Solution

1. Create tests/test_ui.py.
2. Provide dummy info dictionaries (like what analyze_model returns).
3. Capture the rich console output and assert that critical strings (like the correct "VRAM (est):", Color-coded warnings, and model parameter counts) are rendered properly.

Alternatives Considered

No response

Additional Context

No response