fix: serve OG image as static public/og-image.png for LinkedIn

.gitignore

@@ -76,3 +76,4 @@ REVISION
 # Brainstorming specs and implementation plans — working artifacts auto-generated
 # per planning session. Curated documentation lives in docs/*.md instead.
 /docs/superpowers/
+/public/og-image.png

app/services/og_image_generator.rb

@@ -21,7 +21,7 @@ def cached_path
   private
 
   def cache_file
-    Rails.root.join("tmp", "cache", "og", "og-image.png")
+    Rails.root.join("public", "og-image.png")
   end
 
   def valid_cache?

app/views/layouts/application.html.erb

@@ -18,7 +18,7 @@
     <meta property="og:url" content="https://rectorspace.com<%= request.path %>">
     <meta property="og:title" content="<%= content_for(:title) ? "#{content_for(:title)} • RECTOR" : "RECTOR • Building for Eternity" %>">
     <meta property="og:description" content="<%= content_for(:meta_description) || "Full-stack builder. Hackathon hunter. #{achievements_summary}. Building for eternity." %>">
-    <meta property="og:image" content="<%= content_for(:og_image) || "https://rectorspace.com/og-image" %>">
+    <meta property="og:image" content="<%= content_for(:og_image) || "https://rectorspace.com/og-image.png" %>">
     <meta property="og:site_name" content="RECTOR">
 
     <%# Twitter Card meta tags %>
@@ -27,7 +27,7 @@
     <meta name="twitter:creator" content="@RZ1989sol">
     <meta name="twitter:title" content="<%= content_for(:title) ? "#{content_for(:title)} • RECTOR" : "RECTOR • Building for Eternity" %>">
     <meta name="twitter:description" content="<%= content_for(:meta_description) || "Full-stack builder. Hackathon hunter. #{achievements_summary}. Building for eternity." %>">
-    <meta name="twitter:image" content="<%= content_for(:og_image) || "https://rectorspace.com/og-image" %>">
+    <meta name="twitter:image" content="<%= content_for(:og_image) || "https://rectorspace.com/og-image.png" %>">
 
     <%= yield :head %>
 

config/initializers/og_image_warmup.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+# Regenerate public/og-image.png on app boot so social previews always
+# reflect the latest achievements.yml. Wrapped in rescue so a missing
+# ImageMagick install (e.g. on a fresh dev machine) doesn't crash boot.
+Rails.application.config.after_initialize do
+  OgImageGenerator.cached_path
+rescue => e
+  Rails.logger.warn "OG image warmup failed: #{e.class}: #{e.message}"
+end

config/routes.rb

@@ -14,9 +14,6 @@
   get "apply/arbital/modern", to: "apply#arbital_modern", as: :apply_arbital_modern
   get "apply/superteam",      to: "apply#superteam",      as: :apply_superteam
 
-  # Dynamic OG image (auto-updates from achievements.yml)
-  get "og-image", to: "og_images#show", as: :og_image
-
   # Health check
   get "up" => "rails/health#show", as: :rails_health_check