**Critical Issue 1**: Remove generated bundle.js from tracking - Deleted dfgraph/frontend/dist/bundle.js (1.2MB) - File was committed despite .gitignore entry - Now properly ignored by .gitignore **Critical Issue 2**: Remove nix-profile symlinks from tracking - Deleted nix-profile and nix-profile-1-link - These were machine-specific environment artifacts - Added nix-profile* to .gitignore to prevent future commits **Important Issue 3**: Verify tokens.py typing imports - Kept from typing import Optional, List on line 2 - These imports are required by type hints in SMToken, IOToken - Confirmed by test suite: 479 tests pass with imports **Important Issue 4**: TypeScript declaration for cytoscape-dagre - Created dfgraph/frontend/src/cytoscape-dagre.d.ts - Resolves TS7016 "Could not find declaration file" error - Allows TypeScript strict mode to handle untyped import **Minor Issue 5**: Make frontend package-lock.json reproducible - Changed .gitignore: package-lock.json → /package-lock.json - Now only ignores root package-lock.json - Added dfgraph/frontend/package-lock.json to version control - Ensures reproducible frontend builds All tests pass (479 passed in 3.46s)