[nitpick] Inconsistent animation of scoring overlay and related elements

(Appreciate all the hard work, especially with the enhancements to the timers this year. Kudos! 😊)

**Describe the bug**
The match preview/score overlay animates in/out inconsistently -- it will animate sometimes, but not other times. This leads to some nitpicks :)
1. While normally, cutting from a full screen display like a match result to the overlay preview is fine, when we are coming from the Video Only/Chroma it seemingly just suddenly appears, since we are already on a Chroma background, rather than smoothly animating in.
2. The timer smoothly animates in/out, notably when switching away from preview to a different type of display, like Video Only. But, if there is still time on the timer (still visible), it suddenly disappears instead of animating.

**To Reproduce**

https://github.com/user-attachments/assets/1d048d83-4d21-4adf-9214-5999114c5696

1. Video Only -> Match Preview: The lower third seemingly just "appears" rather than animating smoothly.
- (I don't think there is ever a case where this happens, which could just be working as intended?)
2. Match Preview (w/ Timer) -> Show Match: Everything animates smoothly, except for the timeout timer which just pops out of existence.
3. Show Match -> Match Preview (w/ Timer): Some of the graphics cut sharply (i.e. instead of fading when they came in), but otherwise fairly smooth, especially since the backgrounds are fairly similar. Notably, the timeout timer does animate in.
4. Match Preview (w/ Timer) -> Video Only: The overlay animates out rather than cutting, and notably the match timer also animates away rather than suddenly disappearing.

**Expected behavior**
Pretty, consistent animations 😄

**Device (please complete the following information):**
- OS: macOS 15.2 (24C101)
- Browser: Firefox 134.0.1 (aarch64)
- FTCLive v6.4.5

**Additional context**
Purely tiny, minor nitpicks. Great work this season :)

There are a couple of other small details of a similar nature I can nitpick, like Video Only -> Show Match just doing a hard cut as well, but this is probably rare at a real event.
- These are tiny nitpicks, perfectly reasonable to just ignore.