Improve GrampsWeb admin script: reset password if user exists (STI-90)

When the admin user already exists with an unknown password, the startup
script now attempts to reset the password instead of skipping. This
handles the case where GrampsWeb was previously set up without tracking
the admin credentials.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

compose.yml

@@ -225,7 +225,7 @@ services:
         python3 << 'PYEOF' 2>&1 | grep -v Gtk
         from gramps_webapi.app import create_app
         from gramps_webapi.auth import add_user, get_number_users, ROLE_OWNER
-        import os
+        import os, sqlite3, hashlib
         email = os.environ.get('GRAMPSWEB_ADMIN_EMAIL', '')
         pw = os.environ.get('GRAMPSWEB_ADMIN_PASSWORD', '')
         if email and pw:
@@ -235,7 +235,17 @@ services:
                     add_user(name='Admin', email=email, password=pw, role=ROLE_OWNER)
                     print('[grampsweb] Admin user created')
                 else:
-                    print('[grampsweb] Users already exist, skipping')
+                    try:
+                        add_user(name='Admin', email=email, password=pw, role=ROLE_OWNER)
+                        print('[grampsweb] Admin user created')
+                    except Exception:
+                        from gramps_webapi.auth import get_user_details, modify_user
+                        try:
+                            user = get_user_details(name='Admin')
+                            modify_user(name='Admin', password=pw, role=ROLE_OWNER)
+                            print('[grampsweb] Admin user password reset')
+                        except Exception as e:
+                            print(f'[grampsweb] Could not update admin user: {e}')
         else:
             print('[grampsweb] No admin credentials configured, skipping')
         PYEOF