## Context
Back to working on the [RLS
Tester](https://github.com/orgs/supabase/discussions/45233), slowly
adding support for mutation queries. First part here will be to add
support for testing `INSERT` based queries (Note that there's no changes
to the sandbox stuff in this PR)
## Changes involved
- If testing an `INSERT` query, we show a big warning first that the
query will be ran on the actual DB
- Note that we skip the warning if the sandbox is used
<img width="534" height="231" alt="image"
src="https://github.com/user-attachments/assets/ef75a0c9-61e4-49b0-9d78-458e8e5f7f4f"
/>
- If the testing as an anon user + RLS enabled
<img width="601" height="386" alt="image"
src="https://github.com/user-attachments/assets/b21f048d-bac1-4ddd-b84b-c231ae9f9e3e"
/>
- If testing as an auth-ed user + RLS enabled, but the INSERT violates
RLS (conditions don't meet)
<img width="604" height="489" alt="image"
src="https://github.com/user-attachments/assets/41c40486-48d5-4eee-b7cd-8f993edc47be"
/>
- Else if testing as an auth-ed user + RLS enabled and INSERT matches
RLS
<img width="612" height="402" alt="image"
src="https://github.com/user-attachments/assets/41854b40-b351-408b-8d23-cc5e0fa40813"
/>
- Minor cosmetic layout change here
- Use layout horizontal
- Also added the user ID below the dropdown with click to copy action
for convenience
<img width="615" height="528" alt="image"
src="https://github.com/user-attachments/assets/b9c04395-5435-474a-b3c5-640143faa782"
/>
- Added inline guard againsts some conditions
- Should not be able to run UPDATE or DELETE queries
<img width="622" height="319" alt="image"
src="https://github.com/user-attachments/assets/351af7c6-8f1e-47ae-8651-3b9b0b512490"
/>
- Should not be able to run multiple queries
<img width="612" height="317" alt="image"
src="https://github.com/user-attachments/assets/603d9a1f-1d1f-40f2-806d-93aea6b6cf8e"
/>
## To test
- [ ] Verify that the RLS Tester works as expected for an insert query
- Against actual DB
- Against sandbox (only available on staging)
- [ ] Verify that inline guards are all working as expected
- Let me know if there's any edge cases I might have missed!
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* RLS Tester results are now operation-aware (SELECT vs mutations), with
clearer “no rows/all rows” and policy evaluation explanations.
* Added copy-to-clipboard for the impersonated user ID.
* Query parsing now surfaces richer context, including WHERE clause
details and statement count, and SELECT-only previews.
* **Bug Fixes**
* Improved handling of blocked mutation queries and RLS-related error
messaging.
* Updated RLS Tester navigation to the correct policies page.
* Refined sandbox-assisted execution flow and empty/error states.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Context
Previous PR was [here](https://github.com/supabase/supabase/pull/45143)
but it got stale with lots of conflicts so figured it'll be easier redo
it off the latest master
Moves policies page from Auth to Database under an Access Control
section along with Roles. This moves all existing files, applies
redirects, and updates urls to point to the new route
<img width="274" height="412" alt="image"
src="https://github.com/user-attachments/assets/7952c185-64ae-4355-ba36-45397efe1787"
/>
<img width="453" height="471" alt="image"
src="https://github.com/user-attachments/assets/04b3dcb3-48a5-4049-9893-d01109fb46a9"
/>
## To test
- [ ] Verify that policies now live under Database correctly
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added a quick navigation shortcut to open **Database > Policies
(RLS)**.
* **Bug Fixes**
* Updated Policies and RLS-related links across the product to open the
**Database policies** area (menus, command palette, context actions,
alerts, and link-outs).
* Added a permanent redirect from the old **auth policies** URL to the
new **database policies** URL.
* **Documentation**
* Updated RLS Dashboard and security checklist instructions to reference
**Database > Policies**.
* **Tests**
* Adjusted automated tests to validate the new Policies route.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Joshen Lim