Bug: Empty model list

The model selector dropdown ("Default model") shows an empty list — no models are available to select.

Enhancement: Move model selector to bottom bar

Currently the model selector is in the top section of the chat area. Move it to the bottom bar, to the left of the "Pause Agent" button, alongside the other action buttons (Clear Chat, Save Chat, etc.).

Files to investigate

• Top section: webui/components/chat/top-section/chat-top.html
• Bottom bar: webui/components/chat/input/chat-bar.html or bottom-actions.html
• Model loading logic: likely in settings or chat store JS