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bmh129
4bcc63e059
In the web build, Verify's Run OCR and its page/region re-reads never
started the model download. On a fresh page they failed at once with the
desktop's "set PDFCRAFT_MODELS" message, and worked only after Recognize
Text had downloaded the models.
Both now start the download (web_models_missing), say "Downloading the
text recognition models…" and remember what was asked; poll_models runs
it once the models land, or shows "Couldn't download the text
recognition models: {e}" when the download fails. Nothing runs if the
screen was closed meanwhile, and an engine the browser can never run
says why instead of waiting.
Tests: models_landed starts a waiting run and a waiting re-read, reports
a failed download without touching the review, and runs nothing for a
closed screen. The first three fail without the fix. Checked by hand in
Chrome: a fresh page, Verify > Run OCR downloads the models and reads
the page (47 words on a real scan); with the models missing it shows
the HTTP 404 and a second click after restoring them works.