# Walkthrough - Enabling Ruff Rules and Global Cleanup

I have completed the global cleanup of the project by enabling previously suppressed Ruff rules and fixing the detected issues.

## Changes Made

### 1. Unified Ruff Configuration
The following rules were removed from the `ignore` list in `pyproject.toml`:
- `F401`: Unused imports.
- `F841`: Unused variables.
- `I001`: Import sorting (`isort` compatible).

### 2. Automated Cleanup
Executed `ruff check --fix .` and `ruff format .` project-wide.
- **253** inconsistencies were identified and automatically resolved.
- **102** files were reformatted to ensure consistent style.

### 3. Manual Fixes & Regressions
Some issues required manual intervention or surfaced during unit testing:
- **`interpretation_3d_exporter.py`**: Refined 3D component discovery logic to avoid unused import warnings while maintaining feature detection.
- **`preview_layer_factory.py`**: Removed redundant local variables identified by Ruff.
- **`main_dialog_settings.py`**: Restored the `logger` instance that was missing after the cleanup.
- **`tests/base_test.py`**: Enhanced the project's mock system (`MockQWidget`, `MockQgsProject`, etc.) to support the reformatted code and ensure test stability.

## Verification Results

### Automated Tests
Ran the full suite of **316** unit tests (strict `unittest`).
- **312** Passed
- **4** Skipped (as expected)
- **0** Errors
- **0** Failures

```bash
PYTHONPATH=.. uv run python3 -m unittest discover tests
...
Ran 316 tests in 0.595s
OK (skipped=4)
```

## Commit Details
- **Message**: `chore: enable F401, F841, I001 ruff rules and perform global cleanup`
- **Scope**: Configuration & Linting
