Add rake task to sync public/fonts to CDN (R2)

The Material Symbols font was missing on production CDN because
public/fonts/ was never synced to R2 - only public/assets/ was.

Changes:
- Add assets:sync_fonts_to_r2 task to upload public/fonts/ to R2
- Update assets:cdn_deploy to include fonts sync
- Refactor sync logic into reusable sync_directory_to_r2 helper
- Add .otf to content type mapping

To fix production immediately: rake assets:sync_fonts_to_r2

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

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

Author: etewiah

lib/tasks/assets_cdn.rake

@@ -54,21 +54,9 @@ namespace :assets do
     )
   end
 
-  desc "Sync compiled assets to Cloudflare R2 for CDN delivery"
-  task sync_to_r2: :environment do
-    bucket = assets_bucket
-    client = assets_r2_client
-    assets_path = Rails.root.join("public", "assets")
-
-    unless assets_path.exist?
-      puts "No assets directory found. Run 'rails assets:precompile' first."
-      exit 1
-    end
-
-    puts "Syncing assets to R2 bucket: #{bucket}"
-
-    # Content type mapping
-    content_types = {
+  # Content type mapping for uploads
+  def content_type_for(ext)
+    {
       ".js" => "application/javascript",
       ".css" => "text/css",
       ".png" => "image/png",
@@ -80,21 +68,25 @@ namespace :assets do
       ".woff2" => "font/woff2",
       ".ttf" => "font/ttf",
       ".eot" => "application/vnd.ms-fontobject",
+      ".otf" => "font/otf",
       ".ico" => "image/x-icon",
       ".map" => "application/json",
       ".json" => "application/json",
       ".webp" => "image/webp"
-    }
+    }[ext.downcase] || "application/octet-stream"
+  end
 
+  # Helper to sync a directory to R2
+  def sync_directory_to_r2(client, bucket, local_path, r2_prefix, cache_control: "public, max-age=31536000, immutable")
     uploaded = 0
     skipped = 0
 
-    Dir.glob("#{assets_path}/**/*").each do |file_path|
+    Dir.glob("#{local_path}/**/*").each do |file_path|
       next if File.directory?(file_path)
 
-      key = "assets/#{file_path.sub("#{assets_path}/", "")}"
-      ext = File.extname(file_path).downcase
-      content_type = content_types[ext] || "application/octet-stream"
+      key = "#{r2_prefix}/#{file_path.sub("#{local_path}/", "")}"
+      ext = File.extname(file_path)
+      content_type = content_type_for(ext)
 
       # Check if file already exists with same size
       begin
@@ -107,28 +99,65 @@ namespace :assets do
         # File doesn't exist, will upload
       end
 
-      # Upload with cache headers (assets are digest-stamped, cache forever)
+      # Upload with cache headers
       File.open(file_path, "rb") do |file|
         client.put_object(
           bucket: bucket,
           key: key,
           body: file,
           content_type: content_type,
-          cache_control: "public, max-age=31536000, immutable"
+          cache_control: cache_control
         )
       end
 
       uploaded += 1
       puts "  Uploaded: #{key}" if ENV["VERBOSE"]
     end
 
-    puts "Done! Uploaded: #{uploaded}, Skipped (unchanged): #{skipped}"
+    { uploaded: uploaded, skipped: skipped }
+  end
+
+  desc "Sync compiled assets to Cloudflare R2 for CDN delivery"
+  task sync_to_r2: :environment do
+    bucket = assets_bucket
+    client = assets_r2_client
+    assets_path = Rails.root.join("public", "assets")
+
+    unless assets_path.exist?
+      puts "No assets directory found. Run 'rails assets:precompile' first."
+      exit 1
+    end
+
+    puts "Syncing assets to R2 bucket: #{bucket}"
+
+    result = sync_directory_to_r2(client, bucket, assets_path, "assets")
+
+    puts "Done! Uploaded: #{result[:uploaded]}, Skipped (unchanged): #{result[:skipped]}"
+  end
+
+  desc "Sync public/fonts to Cloudflare R2 for CDN delivery"
+  task sync_fonts_to_r2: :environment do
+    bucket = assets_bucket
+    client = assets_r2_client
+    fonts_path = Rails.root.join("public", "fonts")
+
+    unless fonts_path.exist?
+      puts "No fonts directory found at public/fonts."
+      exit 1
+    end
+
+    puts "Syncing fonts to R2 bucket: #{bucket}"
+
+    result = sync_directory_to_r2(client, bucket, fonts_path, "fonts")
+
+    puts "Done! Uploaded: #{result[:uploaded]}, Skipped (unchanged): #{result[:skipped]}"
   end
 
-  desc "Precompile assets and sync to R2"
+  desc "Precompile assets and sync to R2 (includes fonts)"
   task cdn_deploy: :environment do
     Rake::Task["assets:precompile"].invoke
     Rake::Task["assets:sync_to_r2"].invoke
+    Rake::Task["assets:sync_fonts_to_r2"].invoke
   end
 
   desc "Configure CORS on R2 bucket for CDN delivery"