refactor: update weather art descriptions

- Change description to use @weather_art.prompt instead of
  a translated string with multiple parameters.
- Update image_alt method to include the prompt in the
  descriptive text.

These changes simplify the metadata generation for weather art and
improve the clarity of the image descriptions by incorporating the
prompt, which may provide users with additional context.

app/controllers/weather_arts_controller.rb

@@ -21,10 +21,11 @@ class WeatherArtsController < ApplicationController
       title: t("meta.weather_arts.show.title",
                city_name: @city.name,
                date: formatted_date),
-      description: t("meta.weather_arts.show.description",
-                     city_name: @city.name,
-                     description: @weather_art.description,
-                     temperature: @weather_art.temperature),
+      description: @weather_art.prompt,
+      # description: t("meta.weather_arts.show.description",
+      #               city_name: @city.name,
+      #               description: @weather_art.description,
+      #               temperature: @weather_art.temperature),
       keywords: t("meta.weather_arts.show.keywords",
                   city_name: @city.name,
                   country_name: @city.country.name,

app/models/weather_art.rb

@@ -168,7 +168,7 @@ class WeatherArt < ApplicationRecord
   end
 
   def image_alt
-    "#{self.city.full_name} Weather Art - #{self.description} at #{self.temperature}°C on #{self.formatted_time(:date)}"
+    "#{self.city.full_name} Weather Art - #{self.description} at #{self.temperature}°C on #{self.formatted_time(:date)}, #{self.prompt}"
   end
 
   private