Adds Guides sidebar tab
The problem
- Help guides were only reachable through links from the AI assistant.
- No sidebar item led to them.
What we considered
What shipped
- Guides appears in every user's sidebar, below a divider.
- Staff stays last and shows only for staff.
- The guides page has a search box that matches article sections.
- Results replace the grouped list while you type.
Anyone in the company can now open the guides from the sidebar. Type a question and the matching sections show up as you go.

