[Improved, Fixed] Stronger paywall protection for AI phone screening

Improvements

• Paywalled branches now display a locked "AI phone screening" toggle with a clear "Subscribe to turn on" call-to-action during job publishing
• Branch owners can pause or turn off Joy screening at any time, even when the branch is paywalled
• Entitled branches without an interview script now show a warning so you can add a script before enabling Joy

Fixes

• Joy no longer initiates AI phone screening on branches that don’t have an active subscription
• Connecting or reconnecting Indeed no longer automatically turns on Joy screening for pre-existing jobs