Simplify venv creation in Makefile

Remove explicit venv creation step as uv sync and pip install
will handle this automatically.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: tmbnv

Makefile

@@ -12,7 +12,6 @@ autofix:
 # Create virtual environment and install dependencies using uv
 venv:
 	type uv  # uv must be installed
-	python -m venv .venv
 	uv sync --all-extras
 	uv pip install -e .