Fix New Person flow: redirect to new cluster, show hero face, detect duplicate names

After moving a face to "New Person", the user is now taken directly to
that cluster's detail page. If it's a single unnamed cluster, the face
is shown prominently at the top. Typing an existing name on the name
form triggers a confirm dialog: OK merges into the existing person's
cluster, Cancel saves as a new separate person with the same name.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/app.rb b/app.rb
index 7ee7851..9e9cb9d 100644
--- a/app.rb
+++ b/app.rb
@@ -927,6 +927,11 @@ get '/admin/people/:uuid' do
     .map    { |k, v| { uuid: k, name: v['name'] || "(unnamed · #{(v['members'] || []).length})" } }
     .sort_by { |x| x[:name].downcase }
 
+  @existing_names_json = regular
+    .select { |_, v| v['name'] }
+    .map    { |k, v| { uuid: k, name: v['name'] } }
+    .to_json
+
   erb :'admin/person_detail'
 end
 
@@ -965,7 +970,13 @@ post '/admin/people/:uuid/move' do
   data['people'] = people
   atomic_write(PEOPLE_PATH, JSON.pretty_generate(data))
 
-  people[src] ? redirect("/admin/people/#{src}") : redirect('/admin/people')
+  if to == 'new'
+    redirect "/admin/people/#{new_uid}"
+  elsif people[src]
+    redirect "/admin/people/#{src}"
+  else
+    redirect '/admin/people'
+  end
 end
 
 post '/admin/people/__pool__/blacklist_all' do