Enable AI chat initiation directly from filtered card subsets. Currently, users can filter cards by tags and categories to view specific subsets, but cannot directly start an AI chat session limited to those filtered results. The requested feature would add a button in the filter interface or filtered view window labeled "AI Chat with this Subset" that launches an AI chat session constrained to the currently filtered cards. This would complement the announced improvements to the global AI chat filtering functionality by providing an alternative workflow. Users would first apply their desired tag-based filters to narrow down cards to a specific domain or topic, then click the new button to initiate a chat session that only references information from those filtered cards. This approach leverages the existing robust card filtering system and extends it with AI chat capabilities, allowing users to ask questions and interact with the AI based on precisely defined content subsets without manually selecting sources through checkboxes or other mechanisms.