fix: show paid badges in local playlists

[75ohmantenna]

Summary

• Show the Paid badge for paid videos in local playlists instead of displaying their duration in both the classic and experimental Compose UIs.
• Keep the playback-progress overlay hidden for paid playlist entries, including during state-only UI updates.
• Preserve the membership flag when converting a PlaylistStreamEntry back into a StreamInfoItem.
• Add focused regression tests for playlist-entry conversion and paid Compose presentation.

Problem

Paid or members-only videos display a Paid badge in channel and “What’s New” feeds. The same videos display their duration after being saved to a local playlist.

The paid state is already persisted in StreamEntity.isPaid, but the local-playlist item holder did not read it. In addition, PlaylistStreamEntry.toStreamInfoItem() did not transfer the flag to StreamInfoItem.requiresMembership.

Implementation

LocalPlaylistStreamItemHolder now:

• checks StreamEntity.isPaid before rendering the duration;
• applies the existing Paid-badge text and styling;
• hides playback progress for paid entries; and
• prevents state-only updates from restoring the progress overlay.

PlaylistStreamEntry.toStreamInfoItem() now copies isPaid using setRequiresMembership().

The experimental Compose local-item path now uses the same paid-badge precedence and suppresses playback progress for paid entries. Its presentation logic is covered by a focused unit test.

Testing

• Confirmed that the regression test fails on the unmodified dev branch.
• Confirmed that the regression test passes with this change.
• Ran testDebugUnitTest.
• Ran lintDebug.
• Ran assembleDebug.
• Tested successfully on a Pixel 6a running the latest GrapheneOS build.

Related issue

Refs #90

#90

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Disclaimer: This PR and fix were generated with AI assistance, but I have personally read and tested the code to verify that it functions on my device and to ensure its validity. A flesh-and-blood human typed this disclaimer.

[InfinityLoop1308]

Thanks. I removed some code: Compose is going to be dropped, and we don't use test in this project.

[75ohmantenna]

I'll make note of that if I have any future contributions. Thanks for your kindness and keeping this project alive, we appreciate you.