- Move scan tools base path from `/usr/local/bin` to `/opt/xingrin-tools/bin` to avoid conflicts with system tools and Python packages
- Create dedicated `/opt/xingrin-tools/bin` directory in worker Dockerfile following FHS standards
- Update PATH environment variable to prioritize project-specific tools directory
- Add `SCAN_TOOLS_PATH` environment variable to `.env.example` with documentation
- Update settings.py to use new default path with explanatory comments
- Fix TypeScript type annotation in system-logs-view.tsx for better maintainability
- Remove frontend package-lock.json to reduce repository size
- Update task distributor comment to reflect new tool location
This change improves tool isolation and prevents naming conflicts while maintaining FHS compliance.
