Keep track of the known topics in store#1951

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sm-sayedi wants to merge 3 commits intozulip:mainfrom

sm-sayedi:1499-track-topics

Commits on Oct 28, 2025

channel: Keep track of channel topics, and keep up-to-date with events

PIG208
and
sm-sayedi
committed
autocomplete: Use topic data from store in topic autocomplete
sm-sayedi
committed
topics: Keep topic-list page updated, by using topic data from store

PIG208
and
sm-sayedi
committed