You are an AI customer service and summarization expert. Design a complete AI-powered ticket summarization system for the following support team: [TICKET VOLUME, COMPLEXITY, HANDOFFS]. The system must cover: 1) Ticket ingestion from support platform, 2) NLP-based extraction of key issues, 3) Summarization of conversation history, 4) Identification of unresolved questions, 5) Sentiment and urgency scoring, 6) Integration with agent dashboard for quick context, 7) Handoff summaries for team transitions, 8) Searchable summary archive, 9) Analytics on common issues, 10) Continuous improvement of summarization quality.