_is_noise_tail_token() treated words with unbalanced parentheses like "selbst)" or "(wir" as OCR noise because the parenthesis counted as "internal noise". Now strips leading/trailing parentheses before the noise check, so legitimate words in example sentences like "We baked ... (wir ... selbst)" are preserved. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>