fix: use direct commands instead of uv run with --system

Changed from 'uv run <command>' to direct '<command>' execution
since we're using 'uv pip install --system' which installs to
the system Python environment.

This fixes pytest-cov and other plugin detection issues.

Changes:
- pytest instead of uv run pytest
- ruff instead of uv run ruff
- superclaude instead of uv run superclaude
- Added uv pip list for debugging

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

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

.github/workflows/quick-check.yml

@@ -31,19 +31,19 @@ jobs:
 
       - name: Run unit tests only
         run: |
-          uv run pytest tests/unit/ -v --tb=short -x
+          pytest tests/unit/ -v --tb=short -x
 
       - name: Run linter
         run: |
-          uv run ruff check src/ tests/
+          ruff check src/ tests/
 
       - name: Check formatting
         run: |
-          uv run ruff format --check src/ tests/
+          ruff format --check src/ tests/
 
       - name: Verify pytest plugin
         run: |
-          uv run pytest --trace-config 2>&1 | grep -q "superclaude"
+          pytest --trace-config 2>&1 | grep -q "superclaude"
 
       - name: Summary
         if: success()