fix: handle empty strings after event removal in transcription processing (...

TnR2

2025-10-01 528f92f7a2a26cade1c57ccf26b0ba6524e7cae5

1
2
3
4
5
6
7
8
9
hai    2
ba    3
bốn    4
năm    5
sáu    6
bảy    7
bẩy    7
tám    8
chín    9