Add Re-upload to Gokapi button for existing stems

- New reprocess_stems admin action triggers Gokapi upload manually
- Button appears in Stems/Extras Link section when stems_url exists
  but stems_link is empty (webhook fired before Gokapi was configured)
- Updated share link description and placeholder for Gokapi URLs

app.py

@@ -1145,6 +1145,18 @@ def admin_request(rid):
             flash('Stems share link saved.', 'success')
             return redirect(url_for('admin_request', rid=rid))
 
+        elif action == 'reprocess_stems':
+            # Manually trigger Gokapi upload for existing stems (e.g. webhook fired before Gokapi was configured).
+            if not req.get('stems_url'):
+                flash('No stems files to process.', 'error')
+                return redirect(url_for('admin_request', rid=rid))
+            gokapi_url, gokapi_err = process_stems_to_gokapi(req)
+            if gokapi_err:
+                flash(f'Failed to upload stems to Gokapi: {gokapi_err}', 'error')
+            else:
+                flash(f'Stems uploaded to Gokapi: {gokapi_url}', 'success')
+            return redirect(url_for('admin_request', rid=rid))
+
         elif action == 'cancel_request':
             update_request(rid, status='cancelled')
             flash('Request marked as cancelled.', 'success')

templates/admin/request.html

@@ -454,13 +454,16 @@
         <!-- Stems / Extras Link -->
         <div class="section">
           <h2>Stems / Extras Link</h2>
-          <p class="copy-hint">Paste a self-hosted file share link (e.g. from Pingvin Share). It will appear on the customer player page once delivered.</p>
+          <p class="copy-hint">Auto-generated from Gokapi when stems are completed. You can also paste a custom share link here — it will appear in the delivery email.</p>
           <form method="POST">
             <input type="hidden" name="action" value="save_stems_link">
             <label for="stems_link">Share link</label>
-            <input type="url" id="stems_link" name="stems_link" value="{{ req.stems_link or '' }}" placeholder="https://files.dionysismedia.ca/share/...">
+            <input type="url" id="stems_link" name="stems_link" value="{{ req.stems_link or '' }}" placeholder="https://files.dionysismedia.ca/d?id=...">
             <div class="actions">
               <button type="submit" class="secondary">Save Link</button>
+              {% if req.stems_url and not req.stems_link %}
+              <button type="submit" name="action" value="reprocess_stems" class="secondary">Re-upload to Gokapi</button>
+              {% endif %}
             </div>
           </form>
         </div>