- title-util.ts: folderFromTitle() parses 'user@host:~/path' → last folder
segment (home stays ~); pure, dependency-free, 7 unit tests
- terminal-session.ts: onTitleChange → folderFromTitle so the tab auto-names
to the cwd folder and updates live on cd
- Browser-verified: ~ → cd project → 'web-terminal' → cd docs → 'docs' → cd ~ → '~'.
198 tests green, typecheck + build ok.
