feat: add Claude session resume support

style: remove cursor indicator from sidebar items

fix: correct terminal width calculation for fixed sidebar

fix: revert overlay rendering changes and improve focus stack logging

update tui (#4)

fix: defer PTY data processing to render tick to prevent flickering (#3)

fix: clear terminal buffer cells when screen.cell() returns None

fix: prevent panic when truncating file paths in small dialogs

style: format code

test: remove flaky codex interactive test

fix: resolve clippy warnings and format code

docs: update README with complete keybindings and fix sidebar 'd' key conflict

feat: add git panel scrolling and session name input prompt

fix: prevent terminal flicker by draining PTY data before render

refactor: multi-provider session system with validation and decoupling