Allow setting searchType dynamically in ChatChannelListViewModel

[laevandus]

🔗 Issue Link

Resolves IOS-603

🎯 Goal

Allow setting searchType dynamically in ChatChannelListViewModel

🛠 Implementation

Make searchType public in ChatChannelListViewModel and support reloading search results based on the type.

🧪 Testing

For testing purposes I added locally a button for toggling it (ChatChannelListView.swift)

VStack {
    Button("Toggle Results", action: {
        if viewModel.searchType == .messages {
            viewModel.searchType = .channels
        } else {
            viewModel.searchType = .messages
        }
    })
    ChatChannelListContentView(
        viewFactory: viewFactory,
        viewModel: viewModel,
        onItemTap: onItemTap
    )
}

🎨 Changes

☑️ Checklist

• I have signed the Stream CLA (required)
• Changelog is updated with client-facing changes
• New code is covered by unit tests
• Affected documentation updated (docusaurus, tutorial, CMS (task created)

[laevandus]

Moved it because otherwise delegate makes a callback with 0 results before sync finishes and this makes the UI to flash.

[laevandus]

UI was flickering when changing the search type because incorrect search type was set here.

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
StreamChatSwiftUI	7.53 MB	7.54 MB	+1 KB	🟢

[nuno-vieira]

LGTM ✅ we just need to fix the changelog

[sonarqubecloud]

Quality Gate failed

Failed conditions
44.5% Coverage on New Code (required ≥ 70%)

See analysis details on SonarQube Cloud