## Summary
- Removes the "API Docs" navigation item from the sidebar and mobile
menu
- Removes the `UI_PREVIEW_API_SIDE_PANEL` feature preview flag since the
feature is fully rolled out
- Makes API docs buttons unconditionally visible across Auth Users,
Storage, Edge Functions, and SecondLevelNav
## Test plan
- [x] `NavigationBar.utils` tests pass (26 tests)
- [x] `FileExplorerHeader` tests pass (6 tests)
- [x] TypeScript compiles with no errors
- [ ] Verify sidebar no longer shows "API Docs" nav item
- [ ] Verify API docs buttons still appear in Auth Users, Storage, and
Edge Functions pages
- [ ] Verify feature preview modal no longer lists "Project API
documentation"
Resolves FE-2759
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* APIDocs button can optionally display a label and use a custom
tooltip.
* **Chores**
* Removed the API docs side-panel feature flag and its localStorage key.
* “API Docs” navigation entry removed; sidebar no longer special-cases
that route.
* Back links and API Docs buttons now render consistently across the app
(no flag gating).
* **Tests**
* Tests updated to stop depending on the removed feature-flag behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Context
Related to dashboard scalability
Previous PR: https://github.com/supabase/supabase/pull/42856
Note: Changes are all feature flagged still and I'm still not entirely
convinced with the current UX
Will iterate as as go along, and only make this publicly available when
we're satisfied with the behaviour
Adds a "Dashboard preference" section to the project settings
<img width="265" height="740" alt="image"
src="https://github.com/user-attachments/assets/6ce1aa19-26c2-47c6-a9c4-595137266631"
/>
In which users can then select which database they'd like to use for
read queries run from the dashboard
Note: Everything is local storage for now, but we'd need middleware
support if we want to make this setting persist for all users on the
project
<img width="791" height="434" alt="image"
src="https://github.com/user-attachments/assets/e651d6d9-fed4-4da4-b552-c9f93f8d46d3"
/>
Added a dialog as well to further explain what this implies
<img width="610" height="312" alt="image"
src="https://github.com/user-attachments/assets/0aa957af-cb51-476f-aa79-8948a7cbe5ae"
/>
## To test
- Choosing a replica in dashboard preferences will only affect the table
editor as thats the only place that's set up so far to use a replica for
read queries (I'll need to follow up for other parts of the dashboard in
subsequent PRs)
Ali Waseem