misc-utils

feat(pdf-scanner): update tilt angle slider to -5/+5 range and apply verbatim

docs: update AGENTS.md and README.md with Gemini CLI and repository structure

refactor: restructure for local-first consistency and persistent state

feat(pdf-scanner): collapse advanced controls into accordion and update B&W defaults

feat(pdf-scanner): add color-to-alpha signature transparency and ink color selection