fixes button

webconfig/master_secret.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+"""Deploy-time master password (emergency fallback for web + Qt).
+
+Read order:
+  1. BUTTONTASK_MASTER_PASSWORD environment variable
+  2. <config>/.master file (created once at deploy via bt-set-master)
+
+The file is not part of OTA packages and is not committed to git.
+"""
+import os
+from pathlib import Path
+
+from config_store import config_path
+
+MASTER_FILENAME = ".master"
+
+
+def master_password_path():
+    env = os.environ.get("BUTTONTASK_MASTER_FILE")
+    if env:
+        return Path(env)
+    return config_path().parent / MASTER_FILENAME
+
+
+def load_master_password():
+    env = (os.environ.get("BUTTONTASK_MASTER_PASSWORD") or "").strip()
+    if env:
+        return env
+    path = master_password_path()
+    try:
+        if path.is_file():
+            return path.read_text(encoding="utf-8").strip()
+    except OSError:
+        pass
+    return ""