docs: add nested CLAUDE.md structure for progressive disclosure

docs: update for global-only DefaultAgent

fix(settings): remove per-project DefaultAgent override

refactor(project): centralize ticket storage in config directory

fix(settings): implement proper cascade for default settings (#101)

fix(terminal): connect vt10x to PTY for escape sequence responses

feat(terminal): add scrollback buffer and text selection (#95)

fix(terminal): block mouse events leaking to PTY (#100)

fix: reset agent statuses on app startup (#99)

fix(terminal): block motion, always forward scroll (#98)

fix(terminal): restore scroll in terminal pane (#96)

fix(agent): improve opencode server startup (#94)

fix(ui): auto-select project on navigation (#93)

fix(terminal): prevent mouse events leaking to PTY (#92)

fix: remove character limit on ticket description (#91)