- Create src/constants/urls.ts with centralized URL constants (COMFY_URLS, GITHUB_REPOS, MODEL_SOURCES, DEVELOPER_TOOLS)
- Move runtime domain config to src/config/comfyDomain.ts to allow forkers to customize via env var
- Rename uvMirrors.ts to mirrors.ts for better naming consistency
- Add platform and locale-aware desktop guide URL generation (matching PR #4471)
- Update 10 components to use centralized URL constants
- Add comprehensive unit and e2e tests for URL constants validation
This refactoring improves maintainability by centralizing 150+ hardcoded URLs found across 50+ files into a single organized structure.