fix(users): prepend https:// to external links missing protocol (#137)

Website and LinkedIn URLs without a protocol (e.g. "example.com") were
rendered as relative paths, linking to rubycommunity.org/example.com
instead of the external site.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: newstler

app/models/user.rb

@@ -141,9 +141,9 @@ def github_ruby_repositories_url
 
   def social_links
     links = {}
-    links[:website] = website if website.present?
+    links[:website] = ensure_protocol(website) if website.present?
     links[:twitter] = "https://twitter.com/#{twitter}" if twitter.present?
-    links[:linkedin] = linkedin if linkedin.present?
+    links[:linkedin] = ensure_protocol(linkedin) if linkedin.present?
     links[:github] = github_profile_url
     links
   end
@@ -245,6 +245,10 @@ def self.linkify_bio(text)
 
   private
 
+  def ensure_protocol(url)
+    url.match?(%r{\A https?:// }x) ? url : "https://#{url}"
+  end
+
   def precompute_bio_html
     self.bio_html = self.class.linkify_bio(bio)
   end