## Summary
Centralizes all pricing/subscription plan configuration in a single PHP
config file, making it easy to modify prices, features, and promotional
codes from one place.
## Changes
### Config (`config/subscriptions.php`)
- Added `plans` array with support for multiple billing cycles (monthly,
yearly, lifetime)
- Each plan includes: name, price, original_price (for discounts),
stripe_price_id, billing_period, and features
- Added `default_plan` setting to control which plan is highlighted
- Added `promo` config with enabled flag, code, description, and badge
### Frontend
- Created TypeScript types for `Plan`, `PromoConfig`, and
`PricingConfig`
- Updated `welcome.tsx` to display all plans in a responsive grid layout
- Updated `paywall.tsx` to show all plans with "Most Popular" and "Best
Value" badges
- Promo code section is now conditionally rendered based on
`promo.enabled`
### Backend
- Updated `HandleInertiaRequests.php` to share pricing config globally
- Removed redundant props from routes
### Tests
- Added test to verify pricing config structure is passed correctly
## How to Use
To modify pricing, edit `config/subscriptions.php`:
- Change `default_plan` to highlight a different plan
- Set `promo.enabled` to `false` (or `PROMO_ENABLED=false` in `.env`) to
hide promo codes
- Add/remove/modify plans as needed
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