If an external subtitle file is loaded during the first playback, the location of the external subtitle file should be saved in the `watch_history.jsonl` file so that subtitles can be displayed when playback resumes.

[zhouxinghong]

Expected behavior of the wanted feature

Dear Development Team:
If an external subtitle file is loaded during the first playback, the location of the external subtitle file should be saved in the watch_history.jsonl file so that subtitles can be displayed when playback resumes.

Alternative behavior of the wanted feature

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Log File

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Sample Files

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