- Create 7 new models with full relationships and business logic:
* PlanFeature: Define available features with categories and types
* PlanFeatureLimit: Manage usage limits per plan with trial overrides
* PlanPermission: Granular permissions system for features
* PlanProvider: Multi-provider payment configuration
* PlanTier: Hierarchical plan structure with upgrade paths
* PlanUsage: Real-time usage tracking and analytics
* TrialConfiguration: Advanced trial settings per plan
- Enhance Plan model with 25+ new methods:
* Feature checking: hasFeature(), canUseFeature(), getRemainingUsage()
* Permission system: hasPermission() with trial support
* Payment providers: getAllowedProviders(), supportsProvider()
* Trial management: hasTrial(), getTrialConfig()
* Upgrade paths: isUpgradeFrom(), getUpgradePath()
* Utility methods: getBillingCycleDisplay(), metadata handling
- Completely redesign PlanResource with tabbed interface:
* Basic Info: Core plan configuration with dynamic billing cycles
* Features & Limits: Dynamic feature management with trial overrides
* Payment Providers: Multi-provider configuration (Stripe, Lemon Squeezy, etc.)
* Trial Settings: Advanced trial configuration with always-visible toggle
- Create new Filament resources:
* PlanFeatureResource: Manage available features by category
* PlanTierResource: Hierarchical tier management with parent-child relationships
- Implement comprehensive data migration:
* Migrate legacy plan data to new enhanced system
* Create default features (mailbox accounts, email forwarding, etc.)
* Preserve existing payment provider configurations
* Set up trial configurations (disabled for legacy plans)
* Handle duplicate data gracefully with rollback support
- Add proper database constraints and indexes:
* Unique constraints on plan-feature relationships
* Foreign key constraints with cascade deletes
* Performance indexes for common queries
* JSON metadata columns for flexible configuration
- Fix trial configuration form handling:
* Add required validation for numeric fields
* Implement proper null handling with defaults
* Add type casting for all numeric fields
* Ensure database constraint compliance
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