fix(ui): selection status not updating after toggleAll in useSelection hook (#11218)

### What?

After clicking "Select all" `toggleAll(true)`, manually deselecting an
item does not update the overall selection status.

The bulk actions remain visible, and `selectAll` incorrectly stays as
`AllAvailable`.

### How?

Updated `setSelection()` logic to adjust `selectAll` when deselecting an
item if it was previously set to `AllAvailable`.

This ensures that the selection state updates correctly without altering
the effect logic.

`selectAll` switches to Some when an item is deselected after selecting
all.

Bulk actions now hide correctly if no items are selected.

Fixes #10836

test/admin/e2e/general/e2e.spec.ts

@@ -868,6 +868,20 @@ describe('General', () => {
       await expect(page.locator('.row-1 .cell-title')).toContainText(updatedPostTitle)
     })
 
+    test('should update selection state after deselecting item following select all', async () => {
+      await deleteAllPosts()
+      await createPost({ title: 'Post 1' })
+      await page.goto(postsUrl.list)
+      await page.locator('input#select-all').check()
+      await page.locator('button.list-selection__button').click()
+
+      // Deselect the first row
+      await page.locator('.row-1 input').click()
+
+      // eslint-disable-next-line jest-dom/prefer-checked
+      await expect(page.locator('input#select-all')).not.toHaveAttribute('checked', '')
+    })
+
     test('should save globals', async () => {
       await page.goto(postsUrl.global(globalSlug))
 

test/admin/payload-types.ts

@@ -64,7 +64,6 @@ export interface Config {
   auth: {
     users: UserAuthOperations;
   };
-  blocks: {};
   collections: {
     uploads: Upload;
     posts: Post;