Add face and cluster deletion to people admin

On the cluster detail page: "Remove face" option in each face's move
dropdown removes it from the cluster entirely; "Delete cluster" button
(red, with confirmation) removes the whole cluster from people.json.
Moving the last face out of a cluster also auto-deletes it.

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

3 files changed, 25 insertions, 1 deletions

diff --git a/app.rb b/app.rb
index 7ce9d22..192814a 100644
--- a/app.rb
+++ b/app.rb
@@ -939,7 +939,9 @@ post '/admin/people/:uuid/move' do
   halt 404 unless member
   people[src]['members'].delete(member)
 
-  if to == 'new'
+  if to == 'remove'
+    # just drop it — already deleted from src above
+  elsif to == 'new'
     new_uid = SecureRandom.uuid
     people[new_uid] = { 'name' => nil, 'slug' => nil, 'members' => [member] }
   else
@@ -947,12 +949,23 @@ post '/admin/people/:uuid/move' do
     people[to]['members'] << member
   end
 
+  people.delete(src) if people[src] && people[src]['members'].empty?
   data['people'] = people
   atomic_write(PEOPLE_PATH, JSON.pretty_generate(data))
 
   people[src] ? redirect("/admin/people/#{src}") : redirect('/admin/people')
 end
 
+post '/admin/people/:uuid/delete' do
+  require_admin!
+  data   = load_people_data
+  people = data['people'] || {}
+  people.delete(params[:uuid])
+  data['people'] = people
+  atomic_write(PEOPLE_PATH, JSON.pretty_generate(data))
+  redirect '/admin/people'
+end
+
 post '/admin/people/:uuid/merge' do
   require_admin!
   src  = params[:uuid]
diff --git a/public/css/style.css b/public/css/style.css
index 7b0ce1a..64c19e3 100644
--- a/public/css/style.css
+++ b/public/css/style.css
@@ -66,6 +66,8 @@ a:hover { color: var(--accent-hv); text-decoration: underline; }
   transition: background .15s;
 }
 .btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; text-decoration: none; }
+.btn-danger { border-color: #8b2020; color: #e07070; }
+.btn-danger:hover { background: #8b2020; border-color: #8b2020; }
 .btn-sm { padding: 4px 10px; font-size: .8rem; }
 
 /* ── Main content ──────────────────────────────────────────────────────── */
diff --git a/views/admin/person_detail.erb b/views/admin/person_detail.erb
index 448aaff..8a2f8fe 100644
--- a/views/admin/person_detail.erb
+++ b/views/admin/person_detail.erb
@@ -38,6 +38,14 @@
   </section>
   <% end %>
 
+  <%# ── Delete cluster ──────────────────────────────────────────────────── %>
+  <section style="margin-bottom:28px">
+    <form method="post" action="/admin/people/<%= ERB::Util.url_encode(@uuid) %>/delete"
+          onsubmit="return confirm('Delete this entire cluster (<%= @count %> photo<%= @count == 1 ? '' : 's' %>)? This cannot be undone.')">
+      <button type="submit" class="btn btn-danger">Delete cluster</button>
+    </form>
+  </section>
+
   <%# ── Face grid ────────────────────────────────────────────────────────── %>
   <p class="update-hint">
     Hover a face to see the full photo.
@@ -69,6 +77,7 @@
                 <option value="<%= ERB::Util.html_escape(p[:uuid]) %>"><%= ERB::Util.html_escape(p[:name]) %></option>
               <% end %>
               <option value="new">New person</option>
+              <option value="remove">Remove face</option>
             </select>
           </form>
         <% end %>