Add settings page with change password, fix terminal ws bug

dashboard/backend/auth.py

@@ -60,27 +60,39 @@ async def get_current_user_ws(token: str):
         raise credentials_exception
     return username
 
-# TOTP Persistenceturn username
-
 # TOTP Persistence
 AUTH_FILE = config.VOLUME_ROOT + "/docker/nas-dashboard/auth.json"
+import json, os
 
-def load_totp_secret():
+def _load_auth_data():
     try:
-        import json
         if os.path.exists(AUTH_FILE):
             with open(AUTH_FILE, "r") as f:
-                data = json.load(f)
-                return data.get("totp_secret", "")
+                return json.load(f)
     except Exception:
         pass
-    return config.TOTP_SECRET
+    return {}
 
-def save_totp_secret(secret: str):
-    import json
+def _save_auth_data(data):
     os.makedirs(os.path.dirname(AUTH_FILE), exist_ok=True)
     with open(AUTH_FILE, "w") as f:
-        json.dump({"totp_secret": secret}, f)
+        json.dump(data, f)
+
+def load_totp_secret():
+    return _load_auth_data().get("totp_secret", "") or config.TOTP_SECRET
+
+def save_totp_secret(secret: str):
+    data = _load_auth_data()
+    data["totp_secret"] = secret
+    _save_auth_data(data)
+
+def load_password_hash():
+    return _load_auth_data().get("password_hash", "") or config.ADMIN_PASSWORD_HASH
+
+def save_password_hash(hashed: str):
+    data = _load_auth_data()
+    data["password_hash"] = hashed
+    _save_auth_data(data)
         
 def verify_totp(token: str, secret: str = None):
     if secret is None: