Fixed a few issues with "Resume at" feature

[E-D-W-I-N]

Hi, I found a few issues with the "Resume at" button and decided to fix them.
This PR splits each meaningful change into a separate commit.

Issues with "Resume at"

1. Flickering button
   The "Resume at" button briefly appears before the game loads.

   Video

   1-out.mp4
   → Fixed in a4f3d4f

2. Redundant visibility updates
   updateResumeVisibilityFor is called on every playback position change via setLastPositionMilliseconds, even when the button is already hidden.
   This overrides the hide behavior when entering PiP mode, resulting in a non-interactable button in PiP.

   Video

   2-out.mp4
   → Fixed in 276c67d

3. Incorrect behavior in minimized state (important stuff)
   The "Resume at" button remains clickable when the player is minimized.
   Instead of maximizing the player, it seeks to the last playback position.

   Video

   3-out.mp4
   → Fixed in b131fa9

Final Result:

4-out.mp4

Additional changes

• Extracted "Resume at" into string resources
• Added Russian translation

[futo-cla-pr-labler]

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[futo-cla-pr-labler]

Please sign our contributor license agreement at https://cla.futo.org