750a91898a
Background tasks (title generation, tag suggestions, project summaries, RSS classification) were using qwen3:8b and wiping its KV cache after every response, preventing prefix cache hits on subsequent user messages. Adds OLLAMA_BACKGROUND_MODEL (default: qwen2.5:0.5b) config var and routes all background LLM calls to it, keeping qwen3:8b's KV cache warm between user messages for consistent sub-second TTFT. Also adds infinite scroll to KnowledgeView (replaces load-more button) and bakes spaCy en_core_web_sm into the Docker image to eliminate the pip install on every startup. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>