Retires Support/donation/tiers page in favor of simple configurable link

src/app/admin/admin.component.html

@@ -2,7 +2,7 @@
   <div class="container">
     <div class="admin-header">
       <h1>Admin Dashboard</h1>
-      <p>Manage shows, events, tiers, history, team, and community content</p>
+      <p>Manage shows, events, history, team, and community content</p>
     </div>
 
     <!-- Tabs -->
@@ -17,11 +17,6 @@
         [class.active]="activeTab() === 'events'"
         (click)="activeTab.set('events')"
       >Events</button>
-      <button
-        class="tab-btn"
-        [class.active]="activeTab() === 'tiers'"
-        (click)="activeTab.set('tiers')"
-      >Tiers</button>
       <button
         class="tab-btn"
         [class.active]="activeTab() === 'history'"
@@ -130,46 +125,6 @@
       }
     }
 
-    <!-- Tiers Tab -->
-    @if (activeTab() === 'tiers') {
-      @if (tiers$ | async; as tiers) {
-        <div class="tab-content">
-          <div class="tab-toolbar">
-            <h2>Donation Tiers ({{ tiers.length }})</h2>
-            <button class="btn btn-add" (click)="openTierForm()">+ Add Tier</button>
-          </div>
-
-          <table class="admin-table">
-            <thead>
-              <tr>
-                <th>Order</th>
-                <th>Name</th>
-                <th>Amount</th>
-                <th>Benefits</th>
-                <th>Actions</th>
-              </tr>
-            </thead>
-            <tbody>
-              @for (tier of tiers; track tier.id) {
-                <tr>
-                  <td>{{ tier.display_order }}</td>
-                  <td>{{ tier.icon }} {{ tier.name }}</td>
-                  <td>${{ tier.amount.toFixed(2) }}</td>
-                  <td class="benefits-cell">{{ tier.benefits.join(', ') }}</td>
-                  <td class="actions">
-                    <button class="btn-icon btn-edit" (click)="editTier(tier)">Edit</button>
-                    <button class="btn-icon btn-delete" (click)="deleteTier(tier.id)">Delete</button>
-                  </td>
-                </tr>
-              } @empty {
-                <tr><td colspan="5" class="empty-row">No tiers yet. Click "Add Tier" to create one.</td></tr>
-              }
-            </tbody>
-          </table>
-        </div>
-      }
-    }
-
     <!-- History Tab -->
     @if (activeTab() === 'history') {
       @if (historyEntries$ | async; as entries) {
@@ -336,6 +291,10 @@
               <span class="config-label">Website</span>
               <span class="config-value">{{ config.website }}</span>
             </div>
+            <div class="config-row">
+              <span class="config-label">Donation URL</span>
+              <span class="config-value">{{ config.donation_url || '(not set)' }}</span>
+            </div>
           </div>
         </div>
       }
@@ -349,9 +308,6 @@
   @if (showEventForm) {
     <app-admin-event-form [editItem]="editingEvent" (saved)="onEventSaved()" (closed)="onEventClosed()" />
   }
-  @if (showTierForm) {
-    <app-admin-tier-form [editItem]="editingTier" (saved)="onTierSaved()" (closed)="onTierClosed()" />
-  }
   @if (showStationForm) {
     <app-admin-station-form [editItem]="stationConfig$ | async" (saved)="onStationSaved()" (closed)="onStationClosed()" />
   }