AND-401: stream terminal output while commands run

[yaojin3616]

Summary

• correlate foreground bash/pwsh subprocesses with their tool call IDs
• expose non-consuming incremental stdout/stderr snapshots through a Desktop-local endpoint
• render and auto-scroll live output in running terminal cards, then retain the existing settled terminal result and exit-state UI
• bound retained live output and clean up settled process records

Verification

• npm run typecheck
• npm run build
• npm test -- --reporter=dot (90 files, 747 tests)
• verified all four new patch-package patches apply cleanly to the repository tarballs

Fixes #296
Closes AND-401