fix: login response parsing a00.r.r (v0.1.5)

src/mcp_familywall/fw_client.py

@@ -100,24 +100,21 @@ class FamilyWallClient:
 
         if "ex" in body or "un" in body:
             error_data = body.get("ex", body.get("un"))
-            print(
-                f"[LOGIN ERROR] status={response.status_code} body={body}",
-                file=sys.stderr,
-            )
+            _debug_log("LOGIN ERROR", f"status={response.status_code} body={body}")
             msg = f"Login failed: {error_data}"
             raise FamilyWallError(msg, response_data=body)
 
-        if "r" not in body:
-            print(
-                f"[LOGIN ERROR] status={response.status_code} body={body}",
-                file=sys.stderr,
-            )
-            raise FamilyWallError("Login failed: unexpected response format", response_data=body)
+        # Response structure: {"a00": {"r": {"r": {"tokenCsrf": "...", ...}}}}
+        try:
+            session_id: str = body["a00"]["r"]["r"]["tokenCsrf"]
+        except (KeyError, TypeError) as exc:
+            _debug_log("LOGIN ERROR", f"status={response.status_code} body={body}")
+            raise FamilyWallError(
+                "Login failed: unexpected response format", response_data=body
+            ) from exc
 
-        # Extract JSESSIONID from the Set-Cookie header
-        session_id = response.cookies.get("JSESSIONID")
         if not session_id:
-            raise FamilyWallError("Login succeeded but no JSESSIONID cookie returned.")
+            raise FamilyWallError("Login succeeded but tokenCsrf is empty.")
 
         self._session_id = session_id
         logger.debug("Logged in; session acquired")