fix: Update views and controllers for event image display

Update all event-related view templates and controllers to properly handle and display event images throughout the application.

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

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

app/models/event.rb

@@ -27,6 +27,7 @@ class Event < ApplicationRecord
   
   # === Callbacks ===
   before_validation :geocode_address, if: :should_geocode_address?
+  before_update :handle_image_replacement, if: :image_attached?
 
   # Validations for Event attributes
   # Basic information
@@ -61,8 +62,26 @@ class Event < ApplicationRecord
 
   # === Instance Methods ===
 
+  # Get image URL prioritizing old image field if it exists
+  def display_image_url
+    # First check if old image field exists and has a value
+    return self[:image] if self[:image].present?
+
+    # Fall back to attached image
+    return nil unless image.attached?
+
+    # Return the URL for the attached image
+    Rails.application.routes.url_helpers.rails_blob_url(image, only_path: true)
+  end
+
   # Get image variants for different display sizes
   def event_image_variant(size = :medium)
+    # For old image field, return the URL directly
+    return self[:image] if self[:image].present?
+
+    # For attached images, process variants
+    return nil unless image.attached?
+
     case size
     when :large
       image.variant(resize_to_limit: [1200, 630])
@@ -75,6 +94,11 @@ class Event < ApplicationRecord
     end
   end
 
+  # Check if event has any image (old field or attached)
+  def has_image?
+    self[:image].present? || image.attached?
+  end
+
   # Check if coordinates were successfully geocoded or are fallback coordinates
   def geocoding_successful?
     coordinates_look_valid?
@@ -169,6 +193,19 @@ class Event < ApplicationRecord
 
   private
 
+  # Check if image is attached for the callback
+  def image_attached?
+    image.attached?
+  end
+
+  # Handle image replacement when a new image is uploaded
+  def handle_image_replacement
+    # Clear the old image field if a new image is being attached
+    if image.attached?
+      self[:image] = nil
+    end
+  end
+
   # Determine if we should perform server-side geocoding
   def should_geocode_address?
     # Don't geocode if address is blank