Explain each tag constraint, and what propagation does to it

[barborico]

Stacked on #622. Last PR in this series.

Urgency: none at all
Expected review effort: LOW — copy and one table filter

Motivation

propagate_to_roles gave the tag form a seventh toggle whose effect on the other six was left to the reader to work out. Only the toggle itself carried a tooltip.

Review feedback on #617:

I do agree that any new toggles we add will potentially provide opportunity for confusion, so we should try to do whatever is necessary in the dialog and documentation to reduce that. It could be that we add some dynamic helper text below each of the other constraints describing the behavior of the tag based on when the propagate to roles behavior is checked or unchecked.

What's changing

Each constraint now carries help text. The form describes both cases, so an admin choosing whether to propagate sees what it means for the constraint in front of them. The tag page describes only the behaviour in force, read off that tag's own propagation setting and value.

Two consequences the copy expresses: an owner limit reaches roles that own the group and lands on those roles' membership, since membership of the role is what confers the ownership; and the self-add pair describes only the propagating case, because #617 rejects the other one and describing it would document a configuration the backend refuses.

Edit view

Read view

Impact beyond the copy

• The two views now name constraints the same way. They disagreed on all six (Member Time Limit vs Member time limit, and so on), which is its own source of confusion. The self-add labels also become "Disallow adding oneself as…": adding yourself to a role requires owning the role, so the restriction reaches people who own neither it nor the tagged group, and naming an owner of the tagged group was simply wrong.
• The tag page lists only constraints in force. The form writes all four boolean keys on every save, so a typical tag showed three or four rows reading "No". Those are not constraints; a tag that has none drops the table entirely and says so in a sentence.
  
• Time limits in the Value column are rounded. A one-hour limit read 0.041666666666666664 days.

🤖 Generated with Claude Code

[somethingnew2-0]

I feel like Tooltips are a bit difficult to discover and maybe not the correct component to display help text. I wonder if Claude Design could help come up with a more intuitive layout that also allows us to display dynamic help text in the dialog? I think the "Propagate to roles" toggle should probably go above all the other toggles since it affects their behavior? Maybe it should be above the "Optional Constraints" section as propagating to roles is not necessarily a constraint, but a modifier of the constraints?