Plain Home and End now navigate within the current line instead of
jumping to the absolute start/end of the entire input. Ctrl+A and
Ctrl+E remain as absolute start/end shortcuts.
- Add move_cursor_line_start() / move_cursor_line_end() to App
- Wire Home -> move_cursor_line_start(), End -> move_cursor_line_end()
- On single-line input the new methods behave identically to the
absolute versions (no behaviour change)
- End on a newline character skips to the end of the next line
- 14 tests covering multiline, singleline, and edge cases
Paulo Aboim Pinto
f77a07e207