Adjust "account not in good standing" display thresholds

[002love]

Resolves #12533

This PR implements logic to hide the "bad standing" warning for minor infractions, as discussed in the issue

Key changes:

• warning is hidden for regular users if recent silences are <24h and inactive
• moderators still see the warning if any history exists (preserving visibility for staff)
• threshold of 3+ infringements triggers the warning regardless of length

Includes PHPUnit tests covering all logic branches

[LiquidPL]

this is already pretty good, there's just one thing to change

[002love]

Thanks for the feedback, applied all requested changes:

• renamed hasBadStanding to inBadStanding in the model and moved the moderator logic to the UserTransformer
• refactored isAfter() to isFuture()
• cleaned up config_set calls in unit tests

[LiquidPL]

LGTM

[Userlog2]

Thanks for taking the time to implement my idea!

One minor point of criticism, though: It's redundant (and in my opinion, slightly counterproductive) to show the "bad standing" warning if a user has an active silence because:

1. There is another equally obvious info message showing that the user is silenced,
2. The user is silenced and feeling the full effects of it; an extra red text isn't going to make it much more noticeable when they already can't chat, comment, etc.
3. It makes the purpose of the "bad standing" warning less clear. It's intended for severe/repeat offenders, so flashing it at a minor chat offender for 5 minutes could be a bit confusing.

[Userlog2]

An active silence shouldn't hide the account standing warning either, since the warning should be independent of whether the silence is active. Please remove lines 97 to 102.

[nanaya]

and might as well squash the commits