* webui: add LLM title generation option
* webui: use chat_template_kwargs for title gen + fix conversation check
* webui: capture firstUserMessage before async streamChatCompletion to fix race condition
* webui: extract LLM title generation into separate method
* webui: use constants and ChatService for LLM generated titles
* webui: rebuild static output
* webui: add LLM title generation setting to new settings location
* webui: use sendMessage in generateTitle
* webui: rebuild static output
* webui: fix formatting
* webui: configurable title prompt, remove think tag regexes, fix TS error
* webui: group title constants into TITLE object, use TruncatedText for CSS truncation and fix race condition
* webui: rebuild static output
