For Ollama, /api/tags returns all installed models, not running ones.
Add fetch_loaded_models() using /api/ps for Ollama (and /v1/models for
LM Studio/llama.cpp, which already return only loaded models).
_show_local_model_status() now calls fetch_loaded_models() so the
setup wizard correctly shows only in-memory models for Ollama.
At chat session startup, local providers warn when the configured model
is not currently loaded, or when nothing is loaded at all.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
