2Chat: Voice, WhatsApp & SMS

Thanks for using 2Chat! This update brings: • Search across all your live chats and jump straight to the message you're looking for • Hand a conversation over to an AI agent, and see which agent is replying • Shared contacts now appear as easy-to-read contact cards • Previewing a notification sound now plays it, and your choice is saved • Calls no longer ring on a device after you've signed out of it This compares release/1.1.0 against release/1.0.9. There are 10 new commits: - Kept 7 and grouped them into 5 bullets: the two AI-agent commits became one bullet, and so did the two calling fixes. - Left out 3 internal commits: the version bump, translating code comments to English, and the VoIP test-project fix.