test: repair main after concurrent merges

[loganj]

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Summary

• CI on main has failed on every push since several PRs merged close together. Each PR passed on its own, but three unit tests broke once they were combined.
• This PR changes only tests. App behavior does not change.

Details

• Plugin import: Organize app and community settings #173 changed the update warning text from "stays enabled" to "stays on". The test now matches the current text.
• Profile reads: feat(profiles): show agent metadata and copyable nip05 #253 added a public-metadata read for every profile. The feat(profiles): open targeted agent editor from owner profile #254 test counted only two reads for a profile that is not an agent. The test now expects that third read and still checks that no owner reads happen.
• Message row: The "Report message" action from feat(messages): report messages to community moderators #255 reads session.messages. A test stub for the session had no messages field. The stub now has one.