UI/UX - Onboarding -> Settings type of flow #87

I decided to give this a quick go and wanted to note some UI/UX issues.

1. OpenAI -- Let's add the URL as configurable. I'm using MTPLX on a Mac and it supports ollama or openai as a compatible API. So if I want to use OpenAI structured APIs (I do) ... then I want to be able to point to the mac computer's IP Address on the network. Workaround: override ENV injected in, because ... spring.

2. This is actually much more important; when I want to edit a single setting under the site ... I click Settings and get bounced back to the onboarding flow. That's kind of annoying to have to click-through and re-save settings rather than end up on a grouped Settings layout.

Proposed:
Settings

• Agents
• Scheduler
• LLM Provider(s)
• MCP Servers
• etc. (but always Alphabetically sorted rather than some arbitrary sort).

Each with a route like /settings/llm/{providerId}/edit or otherwise.

3. I just wanted to actually say, thanks for assembling this -- I've done a few passes at building a system like this and this looks like a better starting point for what could grow into a really nice and useful app.