Jetpack AI: split component disabled prop

[CGastrell]

The AiModalPromptInput has a single disabled prop to control both the action button and the input. When the post is empty (no title, no content), the Featured Image generator not only disables the action button, but also the prompt input. While it remains an edge case (generating a Featured Image for an empty post) there is no reason we should not allow for a user to generate a featured image on such conditions.

Proposed changes:

This PR adds a secondary actionDisabled prop to control them separately.
For this, it moves all the prompt state logic to the tip of the component tree, removing secondary (and likely contradictory) logic on the shared component AiModalPromptInput.

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

#40198 (review)

Does this pull request change what data or activity we track or use?

No

Testing instructions:

Generator modals (Logo AI generator, General Image AI generator, Featured Image AI generator) should remain usable, open each and confirm enabling/disabling conditions for both input and action button. Generate some image to confirm functionality with both prompt and contextual data.

Empty post (no title, no content) (worth noting, logo block and image block don't count as content):

• All modals: should enable the action button as soon as the prompt has more than 3 characters
• Featured image modal should not auto-start generating an mage
• Input should be enabled at all times (except when generating)

Post with content (title and/or text blocks):

• Logo and General image modals should enable the action button as soon as the prompt has more than 3 characters
• Featured image modal should auto-start generating. When done, a revised prompt derived from the post content should be set
• Featured image modal should NOT disable the action button when prompt is empty (allow for generation based on post content/title)
• Input should be enabled at all times (except when generating)

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WordPress.com Simple site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin, and enable the add/jetpack-ai-prompt-input-disabled-prop branch.

• To test on Simple, run the following command on your sandbox:

  bin/jetpack-downloader test jetpack add/jetpack-ai-prompt-input-disabled-prop
  

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

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[dhasilva]

LGTM. Nice change!