GReader: When using "Mark as Read" before a specific time, Read You inverts read state

[mbestavros]

1. Environment

• Device: [Pixel 8 Pro]
• OS: [Android 14]
• APP: [0.9.11 with Google Reader]

2. Describe the bug

When using time-based Mark as Read (e.g. "mark all articles older than 1 day old as read"), Read You appears to perform a simple invert of the article's read state. This results in articles older than the specified threshold that were already read being marked as Unread, which is not the correct behavior.

This only applies to the Google Reader API (and possibly FreshRSS), as far as I can tell.

[mbestavros]

@Ashinch fyi