Setting to collapse top-level replies by default

[tessalt]

Collapse First-Level Replies by Default

Adds a new tenant setting to collapse first-level replies in the comment stream by default, giving moderators control over the initial display density of threaded conversations.

Changes

Server

• Add collapseReplies boolean setting to tenant configuration
• Add GraphQL schema field for the new setting

Admin

• Add "Collapse Replies" configuration toggle in General settings
• When enabled, top-level replies (depth 1) default to collapsed state

Client

• Refactor CollapsableComment to use local GraphQL store for persistence
• Track user toggles in collapsedCommentSettings (stores comment IDs toggled opposite to default)
• Comments that are manually expanded/collapsed maintain their state within the session
• Newly created comments always render expanded regardless of tenant setting

Behavior

• Setting OFF (default): First-level replies display expanded (existing behavior)
• Setting ON: First-level replies display collapsed, users can expand individually
• toggle states persist on scroll (this is a change from previous behaviour)

These changes will impact:

• commenters
• moderators
• admins
• developers

What changes to the GraphQL/Database Schema does this PR introduce?

Does this PR introduce any new environment variables or feature flags?

If any indexes were added, were they added to INDEXES.md?

How do I test this PR?

• Turn on the setting in General > Collapse Replies
• Go to a stream with threaded comments, observe that the first level of replies is collapsed.
• open up a thread, and see that further nested comments are not collapsed
• scroll down and back, see that the state you recently set is maintained
• reply to a top-level comment, see that the new comment is visible

Were any tests migrated to React Testing Library?

How do we deploy this PR?

[netlify]

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[kabeaty]

Looks good overall! The maintaining collapsed/expanded state on scroll is definitely a nice improvement.

I left a few small comments throughout. My main question is if we want to update so that it's possible to expand/collapse new replies after they have initially loaded in if the user who added the replies clicks on the expand/collapse.

[kabeaty]

This check means that until a user reloads the stream, they cannot collapse their new reply. I'm not sure how often someone would want to do that, but the new comment does show an expand/collapse option still, so it could be a bit confusing that it won't collapse.

[tessalt]

ah interesting. I'm not suuure I care but I'll play around with it for a few minutes. good catch.