fix(studio): clarify RLS disable destructiveness (#46357)

## What kind of change does this PR introduce?

UI fix

## What is the current behavior?

RLS disable dialog is just plain prose.

## What is the new behavior?

RLS disable dialog better communicates the high-risk action.

| Before | After |
| --- | --- |
| <img width="866" height="536" alt="CleanShot 2026-05-26 at 11 31
47@2x"
src="https://github.com/user-attachments/assets/9ae061aa-edf5-45e8-b866-4d59a035a597"
/> | <img width="860" height="534" alt="CleanShot 2026-05-26 at 11 29
42@2x-584E1768-6ACD-4873-9477-A8FA7D017C67"
src="https://github.com/user-attachments/assets/00b485dd-485a-4c28-825c-6c0460e3428d"
/> |

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## Summary by CodeRabbit

* **Refactor**
  * Improved RLS toggle dialog component logic.

* **Tests**
  * Enhanced RLS policies test assertions for better accuracy.

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e2e/studio/features/rls-policies.spec.ts

@@ -160,10 +160,17 @@ test.describe('RLS Policies', () => {
           'RLS disable confirmation modal should appear'
         ).toBeVisible({ timeout: 50000 })
         await expect(
-          page.getByText(
-            'This table will become publicly readable and writable. Anyone can view, add, update, or delete data in this table, and existing RLS policies will no longer apply.'
-          ),
+          page.getByRole('alertdialog'),
           'RLS disable confirmation should explain the access risk'
+        ).toContainText(
+          'This table will become publicly readable and writable. Anyone can view, add, update, or delete data in this table, and existing RLS policies will no longer apply.'
+        )
+        await expect(
+          page
+            .getByRole('alertdialog')
+            .locator('span.font-medium.text-foreground')
+            .filter({ hasText: 'Anyone can view, add, update, or delete data in this table' }),
+          'Key risk phrase should be visually emphasized'
         ).toBeVisible()
         await expect(
           page.getByRole('alertdialog').getByRole('link', { name: 'Learn more' })