Sync site list when CLI creates sites while app is running

[bcotrim]

Related issues

• Fixes STU-1164
• Fixes STU-1163

Proposed Changes

• Add useIpcListener for user-data-updated event in use-site-details.tsx to refresh the site list when the appdata file changes externally (e.g., when CLI creates a site or modifies site settings)
• Handle edge case where the currently selected site is deleted externally by resetting selection to the first available site

Root cause: The file watcher (user-data-watcher.ts) already broadcasts user-data-updated IPC events when the appdata file changes, but use-site-details.tsx was not listening to this event. The snapshot slice listened to it for preview sites, but the main site list did not.

Testing Instructions

Test STU-1164 (Site creation)

1. Open Studio app
2. Build the CLI: npm run cli:build
3. Create a site via CLI: node dist/cli/main.js site create --path /tmp/test-site-cli
4. Verify the new site appears in the sidebar immediately

Test STU-1163 (Site settings changes)

1. Open Studio app with an existing site
2. Open the Settings tab for the site
3. Run node dist/cli/main.js site set-domain hello.wp.local --path PATH_TO_SITE
4. Verify the "Local URL" setting updates in Studio UI
5. Test other commands: set-php-version, set-wp-version, set-https

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[nightnei]

Test STU-1164 (Site creation)

Worked as expected

3. Run node dist/cli/main.js site set-domain hello.wp.local --path PATH_TO_SITE

The changes are not reflected in Studio, tested a few times and reinstalled node_moduels and rebuild

set-php-version

Also changes are not reflected in Studio

set-wp-version

Stucks endlessly on Changing WordPress version… and can't be termninated with controll+c
UPDATE: I got error and again it stucks:

[nightnei]

Run node dist/cli/main.js site set-domain hello.wp.local --path PATH_TO_SITE

Fixed

node dist/cli/main.js site set-wp-version 6.4 --path=~/Studio/bbb

Now I get error. It's newly created site with `node dist/cli/main.js site create --path /tmp/test-site-cli. And Still controll+c doesn't work.

set-php-version

works

set-https

Success, but actually it doesn't work and fails something

[bcotrim]

thanks for the review @nightnei

I couldn't replicate any of the issues, can you run npm install and npm run cli:build and test again please?

[nightnei]

LGTM and works as expected 👍
Looks like something was wrong locally for me when I tested before

[sejas]

We removed and introduced the useIpcListener( 'user-data-updated' listener multiple times in the past. See:

• Removed #2148
• Added #2161
• Removed #2164

I understand this is a good way to update the Studio UI from external changes, such as the CLI creating a new site, although I wonder why we removed it in the first place.

[sejas]

It works as expected. Great work! I confirmed that the site appears automatically in the left sidebar when creating a new site with the Studio CLI. I also tested node dist/cli/main.js site set-domain hello.wp.local --path /tmp/test-site-cli and node dist/cli/main.js site set-php-version 8.4 --path /tmp/test-site-cli.