[CLNP-7306]Fixed a bug that caused a runtime exception when leaving or deleting a channel

[danney-chun]

[fix]: Fixed a bug that caused a runtime exception when leaving or deleting a channel

Fixes CLNP-7306

Changelogs

• Fixed a bug that caused a runtime exception when leaving or deleting a channel

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[Copilot]

Pull Request Overview

This PR fixes a runtime exception when leaving or deleting a channel by adding guards around channel state operations and updating handler logic.

• Added a guard to skip marking as read if the member state is 'none', preventing invalid operations.
• Updated setCurrentChannel to accept null and reset nickname mappings accordingly.
• Ensured loading state is set before fetching a channel and prevented UI updates for the current user in channel event handlers.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/modules/GroupChannel/context/hooks/useGroupChannel.ts	Guarded markAsReadScheduler and made setCurrentChannel accept null
src/modules/ChannelSettings/context/hooks/useSetChannel.ts	Added setLoading(true) before async fetch
src/modules/ChannelSettings/context/hooks/useChannelHandler.ts	Skipped forceUpdateUI when the event’s user is the current user

Comments suppressed due to low confidence (1)

src/modules/GroupChannel/context/hooks/useGroupChannel.ts:80

• Consider adding unit tests to verify that the new guard correctly prevents markAsReadScheduler.push when myMemberState is 'none' and still marks read otherwise.

      if (!state.disableMarkAsRead && state.currentChannel.myMemberState !== 'none') {

[chrisallo]

lgtm!