Upgrade to Laravel 13

[freekmurze]

Summary

Upgrade from Laravel 12 to Laravel 13, adopt new framework features, and migrate AI integrations to first-party packages.

Framework upgrade

• laravel/framework ^12.0 → ^13.0
• laravel/tinker ^2.9 → ^3.0
• pestphp/pest-plugin-laravel ^4.0 → ^4.1
• Filament upgraded from v5.3.2 → v5.4.0
• Symfony components upgraded from v7 → v8

CSRF middleware rename (high impact L13 change)

• VerifyCsrfToken → PreventRequestForgery across bootstrap/app.php, AdminPanelProvider, and custom middleware

Cache configuration (medium impact L13 change)

• Added serializable_classes: false to config/cache.php
• Fixed CACHE_DRIVER → CACHE_STORE env variable name

Laravel 13 PHP attributes

• #[Hidden] on User model
• #[Scope] on all model scopes (Post, Ad, Link, NewsletterTestimonial)
• #[Signature] and #[Description] on all 12 console commands
• #[WithoutRelations] on job model parameters (PostOnBlueskyJob, TootPostJob, TweetPostJob)

AI integration migration

• Replaced openai-php/laravel with laravel/ai (first-party AI SDK)
• Replaced prism-php/prism usage with Laravel AI Agent (PostTagger) using HasStructuredOutput
• EmbeddingService rewritten to use Laravel\Ai\Embeddings
• TaggingService rewritten to use a PostTagger agent instead of Prism structured calls
• Removed explicit prism-php/prism and meilisearch/meilisearch-php dependencies

Bluesky notification channel

• Replaced unmaintained innocenzi/bluesky-notification-channel with new spatie/laravel-bluesky-notification-channel (https://github.com/spatie/laravel-bluesky-notification-channel)
• Updated all imports in PostOnBlueskyJob

Other

• spatie/laravel-mailcoach-sdk ^1.0 → ^1.5 (added Laravel 13 support via Support Laravel 13 laravel-mailcoach-sdk#44)
• Migration guards added for site_search_configs / site_search_documents tables (conflict with schema dump)
• Fixed stale test assertions in HomeControllerTest