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Mistral didn't reliably use Ollama's structured tool calling API — it wrote tool calls as JSON text instead of invoking them. This adds an intent routing layer that classifies user intent via a fast non-streaming LLM call before streaming, executing detected tools directly and bypassing native tool calling. - Change default OLLAMA_MODEL from mistral to qwen3 - Add intent.py: classify_intent() with JSON parsing and fallback regex - Integrate intent routing into generation_task.py round 0 - Add all-day event support (iCalendar DATE values) to CalDAV service - Add recurring event support (RRULE) to CalDAV service and tool definition - Improve create_event tool description for descriptive titles - Enhance system prompt with structured tool usage guidance Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>