feat: comprehensive quality automation with MCP integrations

[bjoernbethge]

Add comprehensive automation system with hooks, MCP servers, and workflows:

New Features

Custom Commands

• /audit: Comprehensive code quality audits with security scanning
• /test: Run tests with flexible arguments and coverage

MCP Server Integrations

• Playwright: Browser automation for UI testing and screenshots
• Enhanced GitHub workflows to use Serena for code review insights
• Enhanced GitHub workflows to use Context7 for documentation lookups

Quality Hooks (Fixed bash compatibility)

• Duplicate code detection hook
• Prettier auto-formatting
• Auto npm install on package.json changes
• Auto test runner for test files
• TypeScript type checking
• Main branch protection

All hooks migrated to separate .sh files with explicit bash execution
to fix shell compatibility issues.

Automated Workflows

• Weekly auto-improvement workflow (Mondays 9 AM UTC)

  • Autonomous analysis of codebase
  • Uses Serena for insights and Context7 for best practices
  • Auto-creates PRs with improvements
  • Focus areas: docs, tests, performance, security, types, quality

• Enhanced PR review with MCP tools

  • Serena for deep code analysis
  • Context7 for framework best practices
  • Structured feedback by severity

DevContainer Updates

• Playwright support with chromium browser
• Playwright VS Code extension
• Environment variables for Playwright configuration

Documentation

• Comprehensive SETUP.md guide
• Environment variables documentation
• MCP server configuration guide
• Hook troubleshooting guide
• Best practices and workflow documentation

Technical Changes

• Fixed hook execution to use bash explicitly (was failing with /bin/sh)
• All hooks now in separate executable .sh files
• Added PLAYWRIGHT_HEADLESS and PLAYWRIGHT_BROWSER env vars
• Updated .mcp.json with Playwright MCP server
• Enhanced PR review workflow with Serena/Context7 integration
• New weekly auto-improvement workflow with intelligent focus detection

Breaking Changes

None - all changes are additive and backward compatible.

Migration Notes

After pulling these changes:

1. Copy new variables from .env.example to your .env
2. Restart Claude Code to reload hook configuration
3. Run chmod +x .claude/hooks/*.sh if hooks fail

Closes #