- Adopt Base UI for the shared form field, input, button, and toggle wrappers
- Replace the local class-name helper with clsx to keep the primitives simpler
- Keep native textarea and select controls where they still fit the existing styling pattern
- Replace the shell convenience script with a cross-platform Python launcher.
- Keep dev.sh as a Unix compatibility wrapper.
- Let the direct backend bind with host and port overrides.
- Update the root and webui README guidance for the new launcher.
- Preserve the backend startup behavior used by the old dev flow.