5bfad210a6
Ghostty on macOS reports Option+Backspace as kitty modifier 11 (wire) = 10 (mask) = super(8) | alt(2). The native key matcher only recognised shift/ctrl/alt, so: - format_kitty_key in crates/pi-natives/src/keys.rs rejected any sequence whose effective modifier had bits beyond shift/ctrl/alt set; parseKey returned undefined for \x1b[127;11u. - parse_key_id recognised only those three modifiers, so even an explicit 'super+alt+backspace' degraded to 'alt+backspace' and could not match an actual super+alt encoded press. - The editor's matchesKey(data, 'alt+backspace') branch was never reached and Option+Backspace either no-op'd or fell through to single-character delete. Added a MOD_SUPER constant, taught parse_key_id, format_with_mods, and format_kitty_key about the super bit, added super+alt+backspace (and super+alt+delete / super+alt+d) to tui.editor.deleteWord* defaults, and broadened the editor's direct matchesKey calls to accept the super+alt variants. Existing alt+backspace / alt+d / alt+delete paths are untouched, so the legacy ESC+DEL workaround keeps working too. Added Rust unit tests for the super modifier (positive and negative for hyper/meta sequences we still drop) and TS regressions in keys.test.ts and editor.test.ts that exercise \x1b[127;11u end-to-end. Fixes #2064