Adds Underwriter's carousel and admin features

src/app/admin/admin.component.html

@@ -37,6 +37,11 @@
         [class.active]="activeTab() === 'station'"
         (click)="activeTab.set('station')"
       >Station</button>
+      <button
+        class="tab-btn"
+        [class.active]="activeTab() === 'underwriters'"
+        (click)="activeTab.set('underwriters')"
+      >Underwriters</button>
     </div>
 
     <!-- Shows Tab -->
@@ -299,6 +304,54 @@
         </div>
       }
     }
+
+    <!-- Underwriters Tab -->
+    @if (activeTab() === 'underwriters') {
+      @if (underwriters$ | async; as underwriters) {
+        <div class="tab-content">
+          <div class="tab-toolbar">
+            <h2>Underwriters ({{ underwriters.length }})</h2>
+            <button class="btn btn-add" (click)="openUnderwriterForm()">+ Add Underwriter</button>
+          </div>
+
+          <table class="admin-table">
+            <thead>
+              <tr>
+                <th>Name</th>
+                <th>Description</th>
+                <th>Website</th>
+                <th>Order</th>
+                <th>Active</th>
+                <th>Actions</th>
+              </tr>
+            </thead>
+            <tbody>
+              @for (uw of underwriters; track uw.id) {
+                <tr>
+                  <td>{{ uw.name }}</td>
+                  <td class="description-cell">{{ uw.description }}</td>
+                  <td>
+                    @if (uw.website_url) {
+                      <a [href]="uw.website_url" target="_blank" rel="noopener">{{ uw.website_url }}</a>
+                    } @else {
+                      —
+                    }
+                  </td>
+                  <td>{{ uw.display_order }}</td>
+                  <td>{{ uw.active ? 'Yes' : 'No' }}</td>
+                  <td class="actions">
+                    <button class="btn-icon btn-edit" (click)="editUnderwriter(uw)">Edit</button>
+                    <button class="btn-icon btn-delete" (click)="deleteUnderwriter(uw.id)">Delete</button>
+                  </td>
+                </tr>
+              } @empty {
+                <tr><td colspan="6" class="empty-row">No underwriters yet. Click "Add Underwriter" to create one.</td></tr>
+              }
+            </tbody>
+          </table>
+        </div>
+      }
+    }
   </div>
 
   <!-- Form modals -->
@@ -320,4 +373,7 @@
   @if (showCommunityForm) {
     <app-admin-community-form [editItem]="editingCommunity" (saved)="onCommunitySaved()" (closed)="onCommunityClosed()" />
   }
+  @if (showUnderwriterForm) {
+    <app-admin-underwriter-form [editItem]="editingUnderwriter" (saved)="onUnderwriterSaved()" (closed)="onUnderwriterClosed()" />
+  }
 </section>