Allow Hermes callback endpoint to accept revision prompts

/api/prompt/<rid> previously rejected any request not in 'pending'
status. This blocked the revision workflow from using the callback.

Now the endpoint accepts 'pending' (sets status to 'prompt_ready') and
'revisions_requested' (keeps status as 'revisions_requested' so the
operator still sees it needs new song uploads).

.gitignore

@@ -1,4 +1,5 @@
 .env
+.env.local
 __pycache__/
 *.pyc
 .venv/

app.py

@@ -549,8 +549,9 @@ def api_update_prompt(rid):
     req = get_request_by_id(rid)
     if not req:
         abort(404)
-    if req['status'] != 'pending':
-        abort(409, description='Request is no longer pending')
+    # Allow updates when the request is pending or when a revision has been requested.
+    if req['status'] not in ('pending', 'revisions_requested'):
+        abort(409, description='Request is no longer pending or awaiting revision')
 
     data = request.get_json(silent=True) or {}
 
@@ -559,14 +560,17 @@ def api_update_prompt(rid):
     if provided_email and provided_email != req['email'].lower():
         abort(400, description='Email mismatch')
 
+    # When this is a revision, keep the revision note and status as revisions_requested
+    # so the operator still sees it as "needs new songs", and preserve customer_approved.
+    new_status = 'revisions_requested' if req['status'] == 'revisions_requested' else 'prompt_ready'
     update_request(rid,
         suno_title=data.get('suno_title', '').strip(),
         suno_style=data.get('suno_style', '').strip(),
         suno_lyrics=data.get('suno_lyrics', '').strip(),
-        status='prompt_ready'
+        status=new_status
     )
 
-    return jsonify({'ok': True, 'request_id': rid, 'status': 'prompt_ready'}), 200
+    return jsonify({'ok': True, 'request_id': rid, 'status': new_status}), 200
 
 
 @app.route('/thanks/<int:rid>')