William Casarin be6b0e2702 Move note language computation off the main thread ...

NLLanguageRecognizer.processString() is an expensive NLP operation that
was moved to @MainActor in 5058fb33, causing UI jank when scrolling.

This moves language detection back to the async preload path where it
runs off the main thread. get_preload_plan is synchronous again and
defers language computation to preload_event. Translations still happen
on the first preload pass since preload_event now checks .havent_tried
directly rather than relying on the load_translations flag from the plan.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-10 10:16:25 -08:00

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