feat: DeepSeek API + transcript fixes; add OAuth captions scope

backend/auth.py

@@ -6,7 +6,10 @@ from google_auth_oauthlib.flow import InstalledAppFlow
 
 log = logging.getLogger(__name__)
 
-SCOPES = ["https://www.googleapis.com/auth/youtube.readonly"]
+SCOPES = [
+    "https://www.googleapis.com/auth/youtube.readonly",
+    "https://www.googleapis.com/auth/youtube.force-ssl"
+]
 CONFIG_DIR = os.environ.get("CONFIG_DIR", "/app/config")
 _local_dir = os.path.dirname(os.path.abspath(__file__))
 _local_config = os.path.join(os.path.dirname(_local_dir), "config")
@@ -34,6 +37,9 @@ def get_credentials():
                     "Download from Google Cloud Console."
                 )
             flow = InstalledAppFlow.from_client_secrets_file(CLIENT_SECRET, SCOPES)
+            # Print URL for manual opening
+            auth_url, _ = flow.authorization_url(prompt='consent', access_type='offline')
+            print(f"\nOpen this URL in your browser:\n{auth_url}\n")
             creds = flow.run_local_server(port=0)
 
         os.makedirs(os.path.dirname(TOKEN_FILE), exist_ok=True)