The typecase guard, explicit navigation keyword dispatch, and word-wrap
cursor calculation changes introduced two regressions:
1. Cursor shows letter before instead of on (off-by-one)
2. Right arrow sometimes moves backward
Reverting to e04b12c which had working arrow keys and single-line cursor.
The unconditional position-cursor fix will be re-applied separately.
Amr Gharbeia
5c4edb3d98