Add views and navigation for HCB payment accounts

- Payment accounts index, new, show views
- Add HCB payment link to settings navigation

app/views/hcb/payment_accounts/index.html.erb

@@ -0,0 +1,46 @@
+<% content_for :title do %>
+  HCB Payment Accounts
+<% end %>
+
+<h1>HCB Payment Accounts</h1>
+
+<% if current_user.hcb_connected? %>
+  <div class="notice success">
+    ✓ HCB account linked
+    <%= link_to "Unlink", hcb_oauth_connection_path, method: :delete, data: { confirm: "Are you sure? This will remove all payment accounts." }, class: "btn btn-small danger" %>
+  </div>
+
+  <div class="actions">
+    <%= link_to "Add Payment Account", new_hcb_payment_account_path, class: "btn success btn-small" %>
+  </div>
+
+  <% if @payment_accounts.any? %>
+    <table>
+      <thead>
+        <tr>
+          <th>Organization</th>
+          <th>Created</th>
+          <th>Actions</th>
+        </tr>
+      </thead>
+      <tbody>
+        <% @payment_accounts.each do |account| %>
+          <tr>
+            <td><%= account.organization_name %></td>
+            <td><%= account.created_at.strftime("%Y-%m-%d") %></td>
+            <td>
+              <%= link_to "Remove", hcb_payment_account_path(account), method: :delete, data: { confirm: "Remove this payment account?" }, class: "btn btn-small danger" %>
+            </td>
+          </tr>
+        <% end %>
+      </tbody>
+    </table>
+  <% else %>
+    <p>No payment accounts yet. Add one to start paying for postage.</p>
+  <% end %>
+<% else %>
+  <div class="notice">
+    <p>Link your HCB account to pay for postage from your organization.</p>
+    <%= link_to "Link HCB Account", new_hcb_oauth_connection_path, class: "btn success" %>
+  </div>
+<% end %>

app/views/hcb/payment_accounts/new.html.erb

@@ -0,0 +1,23 @@
+<% content_for :title do %>
+  Add HCB Payment Account
+<% end %>
+
+<h1>Add HCB Payment Account</h1>
+
+<p>Select an organization to use for paying postage:</p>
+
+<%= form_with url: hcb_payment_accounts_path, method: :post do |f| %>
+  <fieldset>
+    <%= f.label :organization_id, "Organization" %>
+    <%= f.select :organization_id, @organizations.map { |org| [org.name, org.id] }, { prompt: "Select an organization..." } %>
+  </fieldset>
+
+  <%= f.submit "Add Payment Account", class: "btn success btn-small" %>
+  <%= link_to "Cancel", hcb_payment_accounts_path, class: "btn btn-small" %>
+<% end %>
+
+<% if @organizations.empty? %>
+  <div class="notice warning">
+    <p>No organizations found. Make sure you have admin access to at least one HCB organization.</p>
+  </div>
+<% end %>

app/views/hcb/payment_accounts/show.html.erb

@@ -0,0 +1,18 @@
+<% content_for :title do %>
+  <%= @payment_account.organization_name %> - HCB Payment Account
+<% end %>
+
+<h1><%= @payment_account.organization_name %></h1>
+
+<dl>
+  <dt>Organization ID</dt>
+  <dd><code><%= @payment_account.organization_id %></code></dd>
+
+  <dt>Created</dt>
+  <dd><%= @payment_account.created_at.strftime("%Y-%m-%d %H:%M") %></dd>
+</dl>
+
+<div class="actions">
+  <%= link_to "Back to Payment Accounts", hcb_payment_accounts_path, class: "btn btn-small" %>
+  <%= link_to "Remove", hcb_payment_account_path(@payment_account), method: :delete, data: { confirm: "Remove this payment account?" }, class: "btn btn-small danger" %>
+</div>

app/views/shared/_nav.html.erb

@@ -68,9 +68,12 @@
         </details>
       </li>
       <li>
-        <details <%= 'open' if [settings_qz_tray_path].include? request.path %>>
+        <details <%= 'open' if [settings_qz_tray_path].include?(request.path) || request.path.start_with?('/back_office/hcb') %>>
           <summary>Settings</summary>
-          <%= nav_item settings_qz_tray_path, "print settings" %>
+          <ul>
+            <%= nav_item settings_qz_tray_path, "print settings" %>
+            <%= nav_item hcb_payment_accounts_path, "HCB payment" %>
+          </ul>
         </details>
       </li>
       <% admin_tool do %>