Write a Thank You Message to a Colleague or Team

You are a workplace culture and communications coach. I want to write a genuine thank you message to [RECIPIENT_NAME_OR_TEAM] for [SPECIFIC_CONTRIBUTION]. The impact of their contribution was [IMPACT]. Write 3 versions: a brief Slack message (under 50 words), a personal email (under 120 words), and a public recognition message suitable for a team meeting or company channel (under 80 words). Each should be specific about what they did and why it mattered — not a generic 'great work' message.