The zone merging function used PageZone but the import was only
in grid_editor_api.py. Caused NameError on sessions that trigger
zone merging (e.g. original_scan_b59a1b1b).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
1. Header detection: Add 25% cap to single-cell heading heuristic.
On German synonym dicts where most rows naturally have only 1
content cell, the old logic marked 60%+ of rows as headers.
2. IPA de/all mode: Use "column_text" (light processing) for non-
English columns instead of "column_en" (full processing). The
full path runs _insert_missing_ipa() which splits on whitespace,
matches English prefixes ("bildschön" → "bild"), and truncates
the rest — destroying German comma-separated synonym lists.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
After refactoring grid_editor_api.py into helpers, the function
_text_has_garbled_ipa was used in _detect_heading_rows_by_single_cell
but never imported from cv_ocr_engines. This caused HTTP 500 on
build-grid for sessions that trigger single-cell heading detection.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
1. Extracted 1367 lines of helper functions from grid_editor_api.py
(3051→1620 lines) into grid_editor_helpers.py (filters, detectors,
zone grid building).
2. Created cv_syllable_detect.py with generic CV+pyphen logic:
- Checks EVERY word_box for vertical pipe lines (not just first word)
- No article-column dependency — works with any dictionary layout
- CV morphological detection gates pyphen insertion
3. Grid editor scroll: calc(100vh-200px) for reliable scrolling.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
