Search box in recent-DMs page

[gnprice]

The "Direct messages" tab on the app's home screen, which shows your DM conversations by recency, should have a search box. That way if a conversation you're looking for isn't within the first screenful, you can find it by a person's name rather than scrolling through to find it.

This is present in the Figma design, but we left it out of the initial version to keep the implementation simpler.

When we do this, it'll naturally also include a similar search box for the DMs tab of the share-to-Zulip flow.

References

• (Figma — fill in a link here before we pick up this issue)
• Chat thread where it came up that we didn't have an issue tracking this: #mobile > "new DM" in share-to-Zulip @ 💬