Refinement of previous lookback fix - limit to MAX 2 words back.
Reason: with unlimited lookback, the lookback would chain through
words with gaps < 0.5s and keep walking back into the previous verse.
For Žena ME TEPE: 'verjet.' [76.78] → 'Žena' [76.88] gap is 0.10s,
which means lookback would walk back to verses before chorus.
With 2-word limit:
- Clip at 78.19s → 'me' [78.16] is closest preceding word (gap 0.03s)
- Lookback j=i: 'me' → 'Žena' gap 0.14s → captured (i-1)
- Lookback j=i-1: 'Žena' → 'verjet.' gap 0.10s → would be captured
but MAX_LOOKBACK_WORDS=2 stops here ✓
Result: anchor = 'Žena' at 76.88s → new_start = 76.73s.
Subtitle: 'ŽENA ME TEPE' (full phrase, no verse leakage).
sebastjan
d3b71942d2