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- CalDAV integration: per-user calendar config, create/list/search events via caldav library, LLM tools for calendar operations from chat - LLM-suggested tags: new tag_suggestions service prompts LLM with existing tags and note content to suggest 3-5 relevant tags; exposed via API endpoints (suggest-tags, append-tag); integrated into editor views (suggest button + clickable pills) and chat tool calls (pills in ToolCallCard with one-click apply) - Settings/model UI refinements, generation task improvements Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>