Add testing instructions for Jetpack 15.7 (#47721)

Author: tbradsha

projects/plugins/jetpack/changelog/update-to-test.md_for_jetpack_15.7

@@ -0,0 +1,5 @@
+Significance: patch
+Type: other
+Comment: Add testing instructions for Jetpack 15.7.
+
+

projects/plugins/jetpack/to-test.md

@@ -10,3 +10,63 @@
   - Or add the following to something like a code snippet plugin: `add_filter( 'jetpack_blocks_variation', function () { return 'beta'; } );`
 
 You can see a [full list of changes in this release here](https://github.com/Automattic/jetpack-production/blob/trunk/CHANGELOG.md). Please feel free to test any and all functionality mentioned!
+
+### Image Compare block caption link fix
+
+[Image Compare Block: Fix disappearing link bar when highlighting part of a caption](https://github.com/Automattic/jetpack/pull/47197)
+
+Changes were made to fix an issue related to captions – previously if text was added as a caption, it wasn't possible to highlight that text and add a link. Now you should be able to highlight the text and see the toolbar allowing you to add a link.
+
+To test:
+
+1. Create a post with an Image Compare block.
+2. Once the images are added, add a caption.
+3. Highlight the caption and you should see the toolbar, allowing you to add a link.
+4. Add a link and make sure that on save the link remains, as well as allowing you to highlight the text again and change the link.
+5. Make sure general Image Compare block behaviour continues to work as expected.
+
+### AI Assistant jitter fix
+
+[Fix AI Assistant modal shaking when content streams in](https://github.com/Automattic/jetpack/pull/47616)
+
+Prior to this PR, the AI Assistant would violently shake while outputting content. To test the fix:
+
+1. Open a post in the block editor.
+2. Open the AI Assistant from the Jetpack sidebar.
+3. Use "Optimize title" or request feedback on the post.
+4. Observe the modal as text streams in — it should no longer shake or jitter.
+5. If the modal content is long enough to scroll, verify the header stays pinned at the top.
+
+### Admin menu and header tweaks
+
+[Admin Menu: Improve navigation and header consistency](https://github.com/Automattic/jetpack/pull/47417)
+
+**Menu Ordering**
+
+1. Install and activate Jetpack with Backup, Scan, Subscribers, Activity Log, and Jetpack Manage features enabled.
+2. Go to WP Admin → Jetpack.
+3. Verify menu order:
+   - Internal links appear first (My Jetpack, VideoPress, Social, Backup, Forms, etc.)
+   - "Settings" appears as the last internal link
+   - External links appear after Settings (Activity Log ↗, Subscribers ↗, Jetpack Manage ↗, Scan ↗, VaultPress Backup ↗)
+
+**Menu Titles**
+
+Verify in the Jetpack menu:
+- Akismet menu shows as "Anti-spam" (not "Akismet Anti-spam")
+- Backup menu shows as "Backups" (not "VaultPress Backup")
+
+**Button Component**
+
+1. Go to Jetpack → Backups.
+2. Verify the "Back up now" button displays correctly and functions properly.
+3. Click the button and verify it shows loading state during backup queue.
+
+**Header Consistency**
+
+1. Visit various Jetpack admin pages (Backup, Forms, Search, etc.).
+2. Verify header subtitle spacing is consistent across pages.
+
+### WordPress 7.0 compatibility
+
+The next stable release of WordPress is around the corner, so poke around at some of the new features that need testing. A partial list of features can be found [here](https://make.wordpress.org/core/). Report any compatibility issues you might find!