pyto-agent v1.0.20

pyto-agent v1.0.20

Browser chat is the only graphical harness interface

This release removes the harness's native Pyto chat window. The --ui option is no
longer accepted by run.py or install.py. The installer now offers --web to start
browser chat after setup; --chat still starts terminal chat. Running PytoUI from
generated programs and interactive previews remains supported.

The existing browser interface retains chat, approvals, saved-program forms, session
history, cancellation, and same-device server protections. Terminal chat, saved-program
commands, Pyto device tools, Shortcuts, and CLI/Shortcut input handling remain available.

Verification

• Focused browser, installer, CLI, terminal, and loop regressions passed: 149 tests.
• The full offline suite passed: 880 tests in 98.363 seconds.
• python3 stdlib_audit.py passed with no third-party runtime modules and Python 3.10
  syntax compatibility.
• No new Pyto device test was performed for this release.