- Introduce JobProgressTracker in __init__.py to consolidate the duplicated
thread-safe progress/cancellation state and cleanup logic previously
implemented separately for search and hash jobs.
- Extract shared pollHashCalculation method in model_info_methods.js to
centralize hash polling, abort checking, and error handling across all
call sites.
- Use getMissingModelKey in search_panel.js to eliminate inline key
construction duplication.