Morphological analysis debug

Splits a Thai phrase into known dictionary words by greedy longest match. No AI, no database writes — pure lookup against existing entries.

pha^H yaan^M hai^F gaan^M a^L yaang^F chat^H jaehn^M

пха^H йаан^M хай^F каан^M а^L йаанг^F чат^H тьеен^M