A replacement is a prose phrase and may contain commas (e.g. "The video
rapidly cuts, showing the next view."). Both the Movie Editor's splitLines
and the backend _shortcut_replacements string fallback split on commas, so
one phrase became several variants: the editor showed it across lines,
expansion picked one half at random (never matching the comma-form transition
trigger), and a comma edit reverted on save because it re-split every time.
Replacements are now one-per-line only (commas preserved); triggers still
accept comma-separation per their UI. Existing torn replacements self-heal on
the next edit + save.
- mediabrowser.js: separate splitTriggers (\n or ,) and splitReplacements (\n).
- templates.py: _shortcut_replacements string fallback splits on \n only.
- tests: comma phrase stays one replacement (list + string + normalize paths).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
