feat(channels): add thread @-mentions and an Activity page#3158

k11kirky wants to merge 3 commits into

posthog-code/channel-share-linksPostHog/code:posthog-code/channel-share-linksfrom

posthog-code/channel-thread-mentionsPostHog/code:posthog-code/channel-thread-mentionsCopy head branch name to clipboard