feat: Implement event image upload system for promoters

- Add Active Storage migrations for file attachments
- Update Event model to handle image uploads with validation
- Replace image URL fields with file upload in forms
- Add client-side image preview with validation
- Update all views to display uploaded images properly
- Fix JSON serialization to prevent stack overflow in API
- Add custom image validation methods for format and size
- Include image processing variants for different display sizes
- Fix promotion code test infrastructure and Stripe configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/controllers/api/v1/events_controller.rb

@@ -14,14 +14,14 @@ module Api
       # Retrieves all events sorted by creation date (most recent first)
       def index
         @events = Event.all.order(created_at: :desc)
-        render json: @events, status: :ok
+        render json: @events.map { |e| event_json(e) }, status: :ok
       end
 
       # GET /api/v1/events/:id
       # Retrieves a single event by its ID
       # Returns 404 if the event is not found
       def show
-        render json: @event, status: :ok
+        render json: event_json(@event), status: :ok
       end
 
       # POST /api/v1/events
@@ -31,7 +31,7 @@ module Api
       def create
         @event = Event.new(event_params)
         if @event.save
-          render json: @event, status: :created
+          render json: event_json(@event), status: :created
         else
           render json: { errors: @event.errors.full_messages }, status: :unprocessable_entity
         end
@@ -43,7 +43,7 @@ module Api
       # Returns 422 Unprocessable Entity with error messages on failure
       def update
         if @event.update(event_params)
-          render json: @event, status: :ok
+          render json: event_json(@event), status: :ok
         else
           render json: { errors: @event.errors.full_messages }, status: :unprocessable_entity
         end
@@ -73,6 +73,32 @@ module Api
 
       private
 
+      # Helper method to serialize event data safely
+      def event_json(event)
+        {
+          id: event.id,
+          name: event.name,
+          slug: event.slug,
+          description: event.description,
+          state: event.state,
+          venue_name: event.venue_name,
+          venue_address: event.venue_address,
+          start_time: event.start_time,
+          end_time: event.end_time,
+          latitude: event.latitude,
+          longitude: event.longitude,
+          featured: event.featured,
+          created_at: event.created_at,
+          updated_at: event.updated_at,
+          user: {
+            id: event.user.id,
+            email: event.user.email,
+            first_name: event.user.first_name,
+            last_name: event.user.last_name
+          }
+        }
+      end
+
       # Finds an event by its ID or returns 404 Not Found
       # Used as before_action for the show, update, and destroy actions
       def set_event

app/controllers/orders_controller.rb

@@ -164,6 +164,8 @@ class OrdersController < ApplicationController
         flash[:alert] = "Erreur lors de la création de la session de paiement"
       end
     end
+
+    render :checkout
   end
 
   # Increment payment attempt - called via AJAX when user clicks pay button

app/controllers/promoter/events_controller.rb

@@ -29,6 +29,8 @@ class Promoter::EventsController < ApplicationController
     if @event.save
       redirect_to promoter_event_path(@event), notice: "Event créé avec succès!"
     else
+      # If validation fails and an image was attached, purge it
+      @event.image.purge if @event.image.attached?
       render :new, status: :unprocessable_entity
     end
   end